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Antivirus/site/index.html
dev 2cd68ebc57 site: sharpen the copy, sync live design and pricing into the repo 
Joe's note: the visual identity is right, the words were not. This keeps the
design exactly as shipped and rewrites the verbiage to be sharper and more
specific — the hero lede, the stat labels, the "what it catches" framing, the
supply-chain / execution / model-file cards, the agents section, and the
pricing line.

Also reconciles the repo with what is actually live: the current hero-video
design, the new pricing ($59.99/yr Pro, $19/seat/mo Fleet with a 3-seat
minimum), softwareVersion 0.1.12 in the structured data, and the referenced
static assets (hero.mp4, favicon, og-image, privacy/terms, icons). Source
links now point at the public GitHub mirror.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-08-21 16:00:47 -05:00

875 lines
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<!doctype html>
<html lang="en" data-theme="light">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Hound — endpoint and supply-chain security for Linux</title>
<meta name="description" content="Hound blocks a binary before it runs and reads your lockfiles against 235,577 packages that exist only to be malware. Open source agent, Linux-native, built for people who ship software.">
<link rel="canonical" href="https://houndav.com/">
<link rel="icon" href="/favicon.png" type="image/png">
<link rel="apple-touch-icon" href="/icons/app-256.png">
<meta name="robots" content="index, follow, max-snippet:-1, max-image-preview:large">
<meta name="author" content="Hound">
<meta name="theme-color" content="#5A58D6">
<meta property="og:type" content="website">
<meta property="og:url" content="https://houndav.com/">
<meta property="og:site_name" content="Hound">
<meta property="og:title" content="Hound — endpoint and supply-chain security for Linux">
<meta property="og:description" content="Blocks a malicious binary before it runs, in 2 ms, and reads your lockfiles against 235,577 packages that exist only to be malware. Open-source agent. Ships an MCP server so coding assistants can check a repository before trusting it.">
<meta property="og:image" content="https://houndav.com/og-image.jpg">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="Hound — endpoint and supply-chain security for Linux">
<meta name="twitter:description" content="97% of npm's security records are malware, not bugs. Hound knows 235,577 of them by name.">
<meta name="twitter:image" content="https://houndav.com/og-image.jpg">
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap">
<style>
/* ── tokens ──────────────────────────────────────────────────────────
Light is the bare :root, dark is layered over it twice — once for the
un-stamped "follow the system" state, once for an explicit choice —
so all three of auto/light/dark resolve as a complete set. */
:root {
--bg: #F7F7FB;
--raised: #FFFFFF;
--panel: #FFFFFF;
--line: #E2E2EC;
--line-hi: #C9C9DA;
--fg: #14141C;
--dim: #55556B;
--faint: #8A8AA0;
--brand: #5A58C8;
--brand-dim: #7B79D8;
--on-brand: #FFFFFF;
/* Buttons get their own background rather than reusing --brand. White
on the dark theme's #9896E0 is 2.70:1, which fails AA outright; this
is 5.52:1 and lets the label stay white in both themes, which is
what makes the control read as the same object when you switch. */
--btn-bg: #5A58C8;
--btn-bg-hi: #4B49B4;
--ok: #147A3D;
--warn: #9A6100;
--bad: #C22222;
--code-bg: #F0F0F7;
--shadow: 0 1px 2px rgb(20 20 28 / .06), 0 8px 24px rgb(20 20 28 / .05);
--term-bg: #0B0E14;
--term-fg: #E8ECF4;
--term-dim: #8B96AB;
}
@media (prefers-color-scheme: dark) {
:root:not([data-theme="light"]) {
--bg: #0B0E14;
--raised: #12161F;
--panel: #161B26;
--line: #232B3A;
--line-hi: #32405A;
--fg: #E8ECF4;
--dim: #8B96AB;
--faint: #5A6478;
--brand: #9896E0;
--brand-dim: #7B79C8;
--on-brand: #0B0E14;
--btn-bg: #5A58D6;
--btn-bg-hi: #6B69E4;
--ok: #22C55E;
--warn: #F59E0B;
--bad: #EF4444;
--code-bg: #0F131C;
--shadow: 0 8px 30px rgb(0 0 0 / .45);
--term-bg: #080B10;
}
}
:root[data-theme="dark"] {
--bg: #0B0E14;
--raised: #12161F;
--panel: #161B26;
--line: #232B3A;
--line-hi: #32405A;
--fg: #E8ECF4;
--dim: #8B96AB;
--faint: #5A6478;
--brand: #9896E0;
--brand-dim: #7B79C8;
--on-brand: #0B0E14;
--btn-bg: #5A58D6;
--btn-bg-hi: #6B69E4;
--ok: #22C55E;
--warn: #F59E0B;
--bad: #EF4444;
--code-bg: #0F131C;
--shadow: 0 8px 30px rgb(0 0 0 / .45);
--term-bg: #080B10;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
html { scroll-behavior: auto; }
* { animation: none !important; transition: none !important; }
}
body {
background: var(--bg);
color: var(--fg);
font: 16px/1.65 "IBM Plex Sans", system-ui, -apple-system, sans-serif;
-webkit-font-smoothing: antialiased;
overflow-x: hidden;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
/* Grid and flex children default to min-width:auto, so anything holding
a long unbreakable string — a terminal block, a curl command — refuses
to shrink below that string and pushes the whole PAGE sideways instead
of scrolling inside its own box. This is the single most common cause
of a layout that is fine on a desktop and broken on a phone. */
.hero > *, .grid2 > *, .grid3 > *, .tiers > *, .install > *, .stats > * { min-width: 0; }
.mono { font-family: "JetBrains Mono", ui-monospace, monospace; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible {
outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 6px;
}
h1, h2, h3 { font-family: "Space Grotesk", system-ui, sans-serif; letter-spacing: -.02em; text-wrap: balance; }
p { text-wrap: pretty; }
/* ── header ───────────────────────────────────────────────────────── */
header {
position: sticky; top: 0; z-index: 20;
/* Opaque first. A sticky header that falls back to transparent puts
scrolling content underneath the navigation, which is worse than
having no blur. color-mix and backdrop-filter are the enhancement. */
background: var(--bg);
border-bottom: 1px solid var(--line);
}
@supports (backdrop-filter: blur(1px)) and (background: color-mix(in srgb, red 50%, transparent)) {
header {
background: color-mix(in srgb, var(--bg) 88%, transparent);
backdrop-filter: blur(12px);
}
}
.bar { display: flex; align-items: center; gap: 16px; height: 62px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--fg); }
.logo:hover { text-decoration: none; }
.logo svg { width: 30px; height: 30px; flex: 0 0 auto; }
.logo b { font: 700 18px/1 "Space Grotesk", system-ui, sans-serif; }
nav.links { margin-left: auto; display: flex; gap: 22px; align-items: center; }
nav.links a { color: var(--dim); font-size: 14.5px; font-weight: 500; }
nav.links a:hover { color: var(--fg); text-decoration: none; }
nav.links a.btn { color: #FFFFFF; }
nav.links a.btn:hover { color: #FFFFFF; }
/* Hamburger. Hiding links on a phone was not enough — the theme switch
and the call to action still competed for a 360px bar and pushed it
sideways. Below the breakpoint the bar holds the mark and one button,
and everything else moves into a panel. */
.menu-btn {
display: none; appearance: none; border: 1px solid var(--line-hi);
background: var(--raised); color: var(--fg); cursor: pointer;
border-radius: 9px; padding: 9px; line-height: 0; margin-left: auto;
}
.menu-btn svg { width: 20px; height: 20px; }
.menu-btn .close { display: none; }
.menu-btn[aria-expanded="true"] .open { display: none; }
.menu-btn[aria-expanded="true"] .close { display: block; }
/* No display:contents here. An ID beats a class, so it would override
nav.links's own flex layout and margin-left:auto and quietly unstick
the desktop navigation from the right-hand side. The panel styles
belong inside the breakpoint and nowhere else. */
@media (max-width: 760px) {
.menu-btn { display: inline-flex; }
#menu {
display: none;
position: absolute; left: 0; right: 0; top: 100%;
background: var(--bg); border-bottom: 1px solid var(--line);
padding: 8px 24px 20px;
flex-direction: column; align-items: stretch; gap: 4px;
box-shadow: var(--shadow);
}
#menu.open { display: flex; }
#menu a:not(.btn) {
padding: 13px 4px; border-bottom: 1px solid var(--line);
font-size: 16px; color: var(--fg);
}
#menu .theme { align-self: flex-start; margin: 14px 0 4px; }
#menu .btn { justify-content: center; padding: 13px 17px; }
header { position: sticky; }
.bar { position: relative; }
}
/* theme switch */
.theme {
display: inline-flex; border: 1px solid var(--line-hi); border-radius: 999px;
padding: 2px; background: var(--raised); gap: 1px;
}
.theme button {
appearance: none; border: 0; background: transparent; cursor: pointer;
color: var(--faint); padding: 5px 8px; border-radius: 999px; line-height: 0;
}
.theme button svg { width: 15px; height: 15px; }
.theme button[aria-pressed="true"] { background: var(--btn-bg); color: #FFFFFF; }
.btn {
display: inline-flex; align-items: center; gap: 8px;
background: var(--btn-bg); color: #FFFFFF;
font: 600 14.5px/1 "IBM Plex Sans", system-ui, sans-serif;
padding: 11px 17px; border-radius: 9px; border: 1px solid transparent;
transition: background .15s;
}
.btn:hover { background: var(--btn-bg-hi); color: #FFFFFF; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--line-hi); }
.btn.ghost:hover { background: var(--raised); }
/* ── hero ─────────────────────────────────────────────────────────── */
.hero-wrap {
position: relative;
overflow: hidden;
background: #0B0E14;
}
.hero-video {
position: absolute; inset: 0;
width: 100%; height: 100%;
object-fit: cover;
object-position: 70% center;
opacity: 0.55;
}
.hero {
position: relative; z-index: 1;
padding: 100px 0 80px;
display: block;
max-width: 560px;
}
@media (max-width: 900px) {
.hero { padding: 64px 0 52px; max-width: 100%; }
.hero-video { object-position: 60% center; }
}
.eyebrow {
font-family: "JetBrains Mono", ui-monospace, monospace;
font-size: 12px; letter-spacing: 1.3px; text-transform: uppercase;
color: #9896E0; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(34px, 5.2vw, 54px); line-height: 1.05; font-weight: 700; color: #E8ECF4; }
.hero .lede { color: #B0B8C8; font-size: 18px; margin: 20px 0 30px; max-width: 52ch; }
.hero .lede strong { color: #E8ECF4; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.cta .note { color: #8B96AB; font-size: 13.5px; }
.hero-wrap .btn.ghost { color: #E8ECF4; border-color: #3A4558; }
.hero-wrap .btn.ghost:hover { background: rgba(255,255,255,.08); }
/* terminal (used in later sections) */
.term {
background: var(--term-bg); border: 1px solid var(--line); border-radius: 13px;
box-shadow: var(--shadow); overflow: hidden; min-width: 0; max-width: 100%;
}
.term-bar {
display: flex; align-items: center; gap: 9px; padding: 10px 14px;
border-bottom: 1px solid rgb(255 255 255 / .07);
font: 500 11.5px/1 "JetBrains Mono", monospace; color: var(--term-dim);
}
.term-bar i { width: 9px; height: 9px; border-radius: 50%; background: #32405A; display: inline-block; }
.term pre {
margin: 0; padding: 16px 18px 20px; overflow-x: auto; max-width: 100%;
font: 12.5px/1.75 "JetBrains Mono", ui-monospace, monospace;
color: var(--term-fg);
scrollbar-width: thin;
scrollbar-color: rgba(152,150,224,.25) transparent;
}
.term pre::-webkit-scrollbar { height: 5px; }
.term pre::-webkit-scrollbar-track { background: transparent; }
.term pre::-webkit-scrollbar-thumb { background: rgba(152,150,224,.25); border-radius: 4px; }
.term pre::-webkit-scrollbar-thumb:hover { background: rgba(152,150,224,.4); }
.term .p { color: #9896E0; }
.term .d { color: #5A6478; }
.term .g { color: #22C55E; }
.term .r { color: #EF4444; }
.term .y { color: #F59E0B; }
/* ── stat band ────────────────────────────────────────────────────── */
.band { border-block: 1px solid var(--line); background: var(--raised); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); }
@media (max-width: 820px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { background: var(--raised); padding: 26px 22px; }
.stat b { display: block; font: 700 clamp(24px, 3.6vw, 34px)/1 "Space Grotesk", system-ui, sans-serif; font-variant-numeric: tabular-nums; }
.stat span { display: block; margin-top: 7px; font-size: 13px; color: var(--dim); }
/* ── sections ─────────────────────────────────────────────────────── */
section { padding: 76px 0; }
@media (max-width: 720px) { section { padding: 52px 0; } }
.kicker {
font-family: "JetBrains Mono", ui-monospace, monospace;
font-size: 11.5px; letter-spacing: 1.2px; text-transform: uppercase;
color: var(--faint); margin-bottom: 12px;
}
section h2 { font-size: clamp(26px, 3.6vw, 36px); font-weight: 700; }
section .sub { color: var(--dim); margin-top: 14px; max-width: 62ch; font-size: 17px; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; margin-top: 40px; }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; margin-top: 40px; }
@media (max-width: 880px) { .grid2, .grid3 { grid-template-columns: 1fr; } }
.card {
background: var(--panel); border: 1px solid var(--line);
border-radius: 13px; padding: 24px;
}
.card h3 { font-size: 18px; font-weight: 600; margin-bottom: 9px; }
.card p { color: var(--dim); font-size: 14.5px; }
.card .tag {
display: inline-block; font-family: "JetBrains Mono", monospace;
font-size: 10.5px; letter-spacing: .7px; text-transform: uppercase;
color: var(--brand); background: color-mix(in srgb, var(--brand) 12%, transparent);
padding: 3px 8px; border-radius: 999px; margin-bottom: 12px;
}
code, .inline {
font-family: "JetBrains Mono", ui-monospace, monospace; font-size: .88em;
background: var(--code-bg); border: 1px solid var(--line);
padding: 1px 6px; border-radius: 5px; color: var(--fg);
}
/* ── pricing ──────────────────────────────────────────────────────── */
.tiers { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; margin-top: 44px; align-items: stretch; }
@media (max-width: 880px) { .tiers { grid-template-columns: 1fr; } }
.tier {
position: relative; background: var(--panel); border: 1px solid var(--line);
border-radius: 16px; padding: 28px 26px 26px;
display: flex; flex-direction: column;
}
/* The featured tier is marked by a rule along its top edge rather than a
different fill — the card stays the same object, it is just the one
being pointed at. */
.tier.feature { border-color: var(--btn-bg); box-shadow: var(--shadow); }
.tier.feature::before {
content: ""; position: absolute; inset: -1px -1px auto -1px; height: 4px;
background: var(--btn-bg); border-radius: 16px 16px 0 0;
}
.badge {
position: absolute; top: -11px; right: 22px;
background: var(--btn-bg); color: #FFFFFF;
font: 600 10.5px/1 "JetBrains Mono", monospace; letter-spacing: .8px;
text-transform: uppercase; padding: 6px 10px; border-radius: 999px;
}
.tier h3 { font-size: 13px; font-weight: 600; color: var(--dim); letter-spacing: 1px; text-transform: uppercase; }
.price {
margin: 16px 0 2px; font: 700 38px/1 "Space Grotesk", system-ui, sans-serif;
font-variant-numeric: tabular-nums; letter-spacing: -.03em;
}
.price small { font-size: 15px; font-weight: 500; color: var(--dim); letter-spacing: 0; }
.tier .who { color: var(--faint); font-size: 13.5px; margin-top: 8px; min-height: 42px; }
.tier hr { border: 0; border-top: 1px solid var(--line); margin: 22px 0 20px; }
.tier ul { list-style: none; margin: 0 0 26px; display: flex; flex-direction: column; gap: 12px; flex: 1 1 auto; }
/* Two columns, therefore exactly two children: the tick and ONE box
holding all the text. A bare text node sitting beside a <strong>
becomes its own anonymous grid item, lands in the 20px icon column,
and wraps one word per line. */
.tier li { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 10px; font-size: 14.5px; color: var(--dim); line-height: 1.55; align-items: start; }
.tier li > span { min-width: 0; }
.tier li svg { width: 15px; height: 15px; margin-top: 4px; color: var(--ok); }
.tier li strong { color: var(--fg); font-weight: 600; }
.tier .btn { width: 100%; justify-content: center; padding: 13px 17px; }
.tier .fine { margin-top: 12px; font-size: 12px; color: var(--faint); text-align: center; }
/* ── install ──────────────────────────────────────────────────────── */
.install { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 36px; }
@media (max-width: 880px) { .install { grid-template-columns: 1fr; } }
.copy {
display: flex; align-items: center; gap: 12px;
background: var(--code-bg); border: 1px solid var(--line);
border-radius: 10px; padding: 13px 15px;
min-width: 0;
}
/* Only the command scrolls. The button sits outside that box so it can
never be scrolled out of reach — which is what happens when the whole
row is the scroll container. */
.copy .cmd {
overflow-x: auto; min-width: 0; flex: 1 1 auto;
scrollbar-width: thin;
scrollbar-color: var(--brand-dim) transparent;
}
.copy .cmd::-webkit-scrollbar { height: 5px; }
.copy .cmd::-webkit-scrollbar-track { background: transparent; }
.copy .cmd::-webkit-scrollbar-thumb { background: rgba(90,88,200,.2); border-radius: 4px; }
.copy .cmd::-webkit-scrollbar-thumb:hover { background: rgba(90,88,200,.35); }
.copy code {
background: none; border: 0; padding: 0; font-size: 13px;
white-space: nowrap; display: block;
}
.copy button {
appearance: none; border: 1px solid var(--line-hi);
background: var(--raised); color: var(--dim); cursor: pointer;
padding: 8px; border-radius: 7px; flex: 0 0 auto; line-height: 0;
transition: color .15s, border-color .15s;
}
.copy button svg { width: 16px; height: 16px; }
.copy button:hover { color: var(--fg); border-color: var(--fg); }
.copy button .ico-done { display: none; }
.copy button.done { color: var(--ok); border-color: var(--ok); }
.copy button.done .ico-copy { display: none; }
.copy button.done .ico-done { display: block; }
/* On a phone, wrapping beats sideways scrolling: the whole command is
visible at once, and the Copy button is the thing they will use
anyway. break-all because a URL has no useful break points. */
@media (max-width: 720px) {
.copy { align-items: flex-start; flex-direction: column; gap: 10px; }
.copy .cmd { overflow-x: visible; width: 100%; }
.copy code { white-space: pre-wrap; word-break: break-all; line-height: 1.7; }
.copy button { align-self: flex-end; }
}
/* ── faq ──────────────────────────────────────────────────────────── */
.faq { margin-top: 36px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
cursor: pointer; list-style: none; padding: 18px 34px 18px 0; position: relative;
font: 600 17px/1.4 "Space Grotesk", system-ui, sans-serif; color: var(--fg);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
content: ""; position: absolute; right: 6px; top: 26px;
width: 9px; height: 9px; border-right: 2px solid var(--faint);
border-bottom: 2px solid var(--faint); transform: rotate(45deg);
transition: transform .2s;
}
.faq details[open] summary::after { transform: rotate(-135deg); top: 30px; }
.faq p { color: var(--dim); padding: 0 0 20px; max-width: 74ch; font-size: 15.5px; }
/* ── footer ───────────────────────────────────────────────────────── */
footer { border-top: 1px solid var(--line); padding: 40px 0 56px; color: var(--faint); font-size: 13.5px; }
.foot { display: flex; gap: 28px; flex-wrap: wrap; align-items: center; }
.foot a { color: var(--dim); }
.foot .right { margin-left: auto; }
@media (max-width: 640px) { .foot .right { margin-left: 0; } }
</style>
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<script type="application/ld+json">{"@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{"@type": "Question", "name": "Is Hound an antivirus?", "acceptedAnswer": {"@type": "Answer", "text": "Partly, and the interesting part is not. Hound does scan files and quarantine malware, but traditional antivirus databases are overwhelmingly Windows malware, which is close to irrelevant on a Linux developer machine. What actually compromises those machines is a dependency, a model file or a repository, so most of Hound is supply-chain and agent-era detection rather than file signatures."}}, {"@type": "Question", "name": "How is Hound different from ClamAV?", "acceptedAnswer": {"@type": "Answer", "text": "ClamAV's corpus is mostly Windows malware, useful if you are a file server passing infections along to Windows clients. Hound is Linux-native: it refuses a malicious binary at execve rather than reporting it afterwards, and its 235,577 indicators are packages that exist only to be malware, drawn from the OSSF malicious-packages feed. Hound can use clamd alongside it for the Windows-carrier case, but does not require it."}}, {"@type": "Question", "name": "Does Hound slow my machine down?", "acceptedAnswer": {"@type": "Answer", "text": "The execution gate adds about 0.8 milliseconds to a program starting, and sustains over 4,000 executions per second. On a server running 21 containers, 16 Node processes and a web server, arming it did not move request latency or load average. A verdict cache means a program you have already run is answered from memory without re-reading it."}}, {"@type": "Question", "name": "What happens if Hound crashes while it is blocking programs?", "acceptedAnswer": {"@type": "Answer", "text": "Nothing. The gate fails open: a watchdog releases any execution that has not been answered within 500 milliseconds, and if the daemon dies outright the kernel releases everything pending when its descriptor closes. A bug in an antivirus must never be able to freeze a machine, so that path is tested rather than assumed."}}, {"@type": "Question", "name": "Is Hound open source?", "acceptedAnswer": {"@type": "Answer", "text": "The agent is Apache-2.0 and the source is public. You are being asked to run a root daemon that can block execution, so you should be able to read it. Definitions are signed with a key whose public half is compiled into the binary, so anyone can verify that the definitions they received are the ones that were published. What is paid for is the threat feed, the console and support."}}, {"@type": "Question", "name": "Can my coding assistant use Hound?", "acceptedAnswer": {"@type": "Answer", "text": "Yes. Hound ships an MCP server with four read-only tools, so Claude, Cursor, VS Code or anything else that speaks MCP can check a project before installing its dependencies, check a single package or model file, and audit the MCP servers it is already trusting. There is deliberately no tool that can delete or quarantine anything: an assistant that can be persuaded by the repository it is reading must not be able to make your antivirus destroy files."}}, {"@type": "Question", "name": "What does Hound detect that other scanners do not?", "acceptedAnswer": {"@type": "Answer", "text": "Packages whose install script pipes a remote script into a shell before you have used any of their code. Package names an AI invented that somebody then registered. Model files whose pickle stream calls os.system when loaded. Instructions in CLAUDE.md or .cursorrules aimed at your assistant rather than at you. MCP servers downloaded fresh from the internet on every launch and handed an API token. Setuid binaries no installed package claims."}}, {"@type": "Question", "name": "Does Hound phone home?", "acceptedAnswer": {"@type": "Answer", "text": "No telemetry by default, and it can run fully offline with definitions imported from a file, which is how it works in air-gapped and regulated environments. The only network request it makes is fetching signed definition packs, and you can point that at your own mirror."}}, {"@type": "Question", "name": "Which Linux distributions does Hound support?", "acceptedAnswer": {"@type": "Answer", "text": "Ubuntu, Debian and Linux Mint have packages today. An AppImage runs anywhere without installing, though it cannot provide the execution gate, which needs privileges an uninstalled bundle does not have. RPM and Arch packaging exists but is not yet built and published."}}]}</script>
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<b>Hound</b>
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<a href="#what">What it catches</a>
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<div class="hero">
<div class="eyebrow">Linux · open source agent</div>
<h1>Your antivirus has never heard of the things that actually reach your machine.</h1>
<p class="lede">
Hound refuses a malicious binary at launch and reads your lockfiles against
<strong>235,577 packages that exist only to attack you</strong> — the poisoned
dependency, the model file that runs code when it loads, the install script that
fires before you have imported a line. Built for the machines you ship software from.
</p>
<div class="cta">
<a class="btn" href="#install">Install on Linux</a>
<a class="btn ghost" href="#what">See what it catches</a>
<span class="note">Free tier, no account.</span>
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<div class="band">
<div class="wrap">
<div class="stats">
<div class="stat"><b>97%</b><span>of npm's security advisories are malware, not bugs</span></div>
<div class="stat"><b>235,577</b><span>malicious packages Hound blocks by name</span></div>
<div class="stat"><b>2&nbsp;ms</b><span>to stop a malicious binary at <span class="mono">execve</span></span></div>
<div class="stat"><b>0.8&nbsp;ms</b><span>added to every other program you run</span></div>
</div>
</div>
</div>
<section id="what">
<div class="wrap">
<div class="kicker">What it catches</div>
<h2>What compromises a Linux dev machine is not a Windows virus.</h2>
<p class="sub">
Every other scanner is looking for the wrong thing. Their databases are overwhelmingly
Windows malware — useful on a file server relaying infections, irrelevant to the laptop
you write code on. What actually reaches a developer machine arrives through a dependency,
a model file, or a repository you cloned. That is what Hound is built to catch.
</p>
<div class="grid3">
<div class="card">
<span class="tag">Supply chain</span>
<h3>Dependencies that are malware</h3>
<p>A typosquat one keystroke off a real package. A name your AI assistant hallucinated that an attacker then registered and filled with a payload. Hound reads the lockfile, so it catches what <em>will</em> be installed — before the install script ever runs.</p>
</div>
<div class="card">
<span class="tag">Execution</span>
<h3>Stopped at launch, not flagged after</h3>
<p>Most tools tell you about the malware that already ran. Hound denies the <span class="mono">execve</span> itself, in about two milliseconds, built on fanotify. A watchdog fails the gate open — a bug in your antivirus must never be the thing that freezes your machine.</p>
</div>
<div class="card">
<span class="tag">Model files</span>
<h3>Weights that are really programs</h3>
<p>A pickle-based <span class="mono">.pt</span> or <span class="mono">.ckpt</span> runs arbitrary code the moment you load it — <span class="mono">torch.load</span> is a code-execution decision most people make by reflex. Hound reads the pickle opcodes and tells you before you find out the hard way.</p>
</div>
<div class="card">
<span class="tag">Persistence</span>
<h3>What changed since last time</h3>
<p>Half of a Linux compromise is a line added to a startup file, not a file on disk. Hound keeps a hashed ledger of systemd units, cron, autostart, shell profiles and authorized_keys, and reports what moved.</p>
</div>
<div class="card">
<span class="tag">Install scripts</span>
<h3>Code that runs on <span class="mono">npm install</span></h3>
<p>A <span class="mono">postinstall</span> hook that pipes a remote script into a shell, decodes something scrambled and runs it, or reaches for your SSH keys. It executes before you have used a line of the package.</p>
</div>
<div class="card">
<span class="tag">Rootkits</span>
<h3>Questions with factual answers</h3>
<p>A process the kernel has but <span class="mono">/proc</span> does not list. A setuid binary no installed package claims. Not guesswork against a list of names that only holds on one distribution.</p>
</div>
</div>
</div>
</section>
<section id="agents" class="band">
<div class="wrap">
<div class="kicker">For people who code with agents</div>
<h2>Your coding assistant can ask Hound before it trusts anything.</h2>
<p class="sub">
You have handed an AI agent the keys to your machine and pointed it at the open internet.
Hound ships an MCP server, so Claude, Cursor, VS Code — anything that speaks MCP — can
check a repository, a package or a model file before it installs or runs a thing.
</p>
<div class="grid2">
<div class="term" aria-label="MCP configuration">
<div class="term-bar"><i></i><i></i><i></i> ~/.config/mcp/servers.json</div>
<pre>{
<span class="p">"mcpServers"</span>: {
<span class="p">"hound"</span>: {
<span class="p">"command"</span>: <span class="g">"/usr/bin/hound-mcp"</span>
}
}
}
<span class="d">// No npx — nothing fetched at launch.</span>
<span class="d">// No env — no secret handed over.</span>
<span class="d">// No path — no directory granted.</span>
<span class="d">//</span>
<span class="d">// Hound flags all three in other</span>
<span class="d">// people's configs. Ours passes its</span>
<span class="d">// own audit.</span>
</pre>
</div>
<div style="display:flex; flex-direction:column; gap:18px;">
<div class="card">
<h3>Four read-only tools</h3>
<p><span class="mono">check_project</span>, <span class="mono">check_package</span>, <span class="mono">check_file</span>, <span class="mono">check_mcp_config</span>. There is no quarantine tool and never will be — an assistant that can be persuaded by the repository it is reading must not be able to make your antivirus delete things.</p>
</div>
<div class="card">
<h3>It audits the tools you already trust</h3>
<p>Every MCP server in your config runs with your permissions and gets called without asking you. Hound tells you which ones download their code fresh on every launch, and which ones you handed a token.</p>
</div>
<div class="card">
<h3>Written to be read twice</h3>
<p>Once by the model, once by you. No rule identifiers, no jargon, and a clean result says what it did <em>not</em> check — because "nothing wrong" that reads as a blanket endorsement is worse than no answer.</p>
</div>
</div>
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</div>
</section>
<section id="pricing">
<div class="wrap">
<div class="kicker">Pricing</div>
<h2>The scanner is free. The blocking and the feed are not.</h2>
<p class="sub">
Everything that runs on your own machine — scanning, quarantine, the supply-chain and
agent-era checks, the MCP server — is free forever, no account and no expiry. What you pay
for is the part that costs real money to build and serve: refusing execution at launch, and
the full malicious-package feed.
</p>
<div class="tiers">
<div class="tier">
<h3>Free</h3>
<div class="price">$0</div>
<p class="who">Everyone. No account, no telemetry, no expiry.</p>
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<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>On-demand scanning, CLI and desktop app</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>Real-time file protection</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>Quarantine vault with one-click restore</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>MCP server for your coding assistant</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>Rootkit and persistence checks</span></li>
</ul>
<a class="btn ghost" href="#install">Install</a>
<p class="fine">Apache-2.0. Yours to read and to fork.</p>
</div>
<div class="tier feature">
<span class="badge">Most popular</span>
<h3>Pro</h3>
<div class="price">$59.99 <small>/ year</small></div>
<p class="who">One machine, for someone who builds software on it.</p>
<hr>
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<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>Everything in Free</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span><strong>Execution gate</strong> — a malicious binary is refused before it runs, in 2&nbsp;ms</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span><strong>Supply-chain scanner</strong> against all 235,577 indicators</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span><strong>Hound Linux threat pack</strong> — miners, backdoors, rootkits, webshells</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>Signed definitions, updated automatically</span></li>
</ul>
<a class="btn" href="#install">Get Pro</a>
<p class="fine">Annual only. Billed once, cancel any time.</p>
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<div class="tier">
<h3>Fleet</h3>
<div class="price">$19 <small>/ seat / month</small></div>
<p class="who">3-seat minimum. Annual billing at 10 months' price.</p>
<hr>
<ul>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>Everything in Pro, on every machine</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>Central console, enrolment and policy push</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span><strong>Compliance reports</strong> an auditor accepts</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>Air-gapped definition mirrors</span></li>
<li><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg><span>Priority support and a named contact</span></li>
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<p class="fine">Over 25 seats? Volume pricing available.</p>
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</section>
<section id="install" class="band">
<div class="wrap">
<div class="kicker">Install</div>
<h2>One command, then it is running.</h2>
<p class="sub">
Ubuntu, Debian and Linux Mint today. The execution gate ships switched <strong>off</strong> —
it needs root and covers your whole filesystem, so turning it on is your decision rather
than the installer's.
</p>
<div class="install">
<div>
<p style="color:var(--dim); font-size:14px; margin-bottom:10px;"><strong style="color:var(--fg)">Debian, Ubuntu, Mint</strong></p>
<div class="copy">
<div class="cmd"><code id="c1">curl -fsSL https://dl.houndav.com/deb/hound_latest_amd64.deb -o hound.deb &amp;&amp; sudo apt install ./hound.deb</code></div>
<button data-copy="c1" aria-label="Copy command" title="Copy command">
<svg class="ico-copy" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="9" y="9" width="12" height="12" rx="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg>
<svg class="ico-done" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg>
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</div>
<div>
<p style="color:var(--dim); font-size:14px; margin-bottom:10px;"><strong style="color:var(--fg)">Try it without installing</strong></p>
<div class="copy">
<div class="cmd"><code id="c2">curl -fsSL https://dl.houndav.com/appimage/Hound-latest-x86_64.AppImage -o hound &amp;&amp; chmod +x hound &amp;&amp; ./hound status</code></div>
<button data-copy="c2" aria-label="Copy command" title="Copy command">
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<svg class="ico-done" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6 9 17l-5-5"/></svg>
</button>
</div>
</div>
</div>
<p style="color:var(--faint); font-size:13.5px; margin-top:22px;">
The AppImage runs as your user and leaves nothing behind. It cannot do the execution gate —
that needs privileges an uninstalled bundle does not have — and it will tell you so rather
than failing quietly.
</p>
</div>
</section>
<section id="faq">
<div class="wrap">
<div class="kicker">Questions</div>
<h2>What people ask before installing it.</h2>
<div class="faq">
<details>
<summary>Is Hound an antivirus?</summary>
<p>Partly, and the interesting part is not. Hound does scan files and quarantine malware, but traditional antivirus databases are overwhelmingly Windows malware, which is close to irrelevant on a Linux developer machine. What actually compromises those machines is a dependency, a model file or a repository, so most of Hound is supply-chain and agent-era detection rather than file signatures.</p>
</details>
<details>
<summary>How is Hound different from ClamAV?</summary>
<p>ClamAV's corpus is mostly Windows malware, useful if you are a file server passing infections along to Windows clients. Hound is Linux-native: it refuses a malicious binary at execve rather than reporting it afterwards, and its 235,577 indicators are packages that exist only to be malware, drawn from the OSSF malicious-packages feed. Hound can use clamd alongside it for the Windows-carrier case, but does not require it.</p>
</details>
<details>
<summary>Does Hound slow my machine down?</summary>
<p>The execution gate adds about 0.8 milliseconds to a program starting, and sustains over 4,000 executions per second. On a server running 21 containers, 16 Node processes and a web server, arming it did not move request latency or load average. A verdict cache means a program you have already run is answered from memory without re-reading it.</p>
</details>
<details>
<summary>What happens if Hound crashes while it is blocking programs?</summary>
<p>Nothing. The gate fails open: a watchdog releases any execution that has not been answered within 500 milliseconds, and if the daemon dies outright the kernel releases everything pending when its descriptor closes. A bug in an antivirus must never be able to freeze a machine, so that path is tested rather than assumed.</p>
</details>
<details>
<summary>Is Hound open source?</summary>
<p>The agent is Apache-2.0 and the source is public. You are being asked to run a root daemon that can block execution, so you should be able to read it. Definitions are signed with a key whose public half is compiled into the binary, so anyone can verify that the definitions they received are the ones that were published. What is paid for is the threat feed, the console and support.</p>
</details>
<details>
<summary>Can my coding assistant use Hound?</summary>
<p>Yes. Hound ships an MCP server with four read-only tools, so Claude, Cursor, VS Code or anything else that speaks MCP can check a project before installing its dependencies, check a single package or model file, and audit the MCP servers it is already trusting. There is deliberately no tool that can delete or quarantine anything: an assistant that can be persuaded by the repository it is reading must not be able to make your antivirus destroy files.</p>
</details>
<details>
<summary>What does Hound detect that other scanners do not?</summary>
<p>Packages whose install script pipes a remote script into a shell before you have used any of their code. Package names an AI invented that somebody then registered. Model files whose pickle stream calls os.system when loaded. Instructions in CLAUDE.md or .cursorrules aimed at your assistant rather than at you. MCP servers downloaded fresh from the internet on every launch and handed an API token. Setuid binaries no installed package claims.</p>
</details>
<details>
<summary>Does Hound phone home?</summary>
<p>No telemetry by default, and it can run fully offline with definitions imported from a file, which is how it works in air-gapped and regulated environments. The only network request it makes is fetching signed definition packs, and you can point that at your own mirror.</p>
</details>
<details>
<summary>Which Linux distributions does Hound support?</summary>
<p>Ubuntu, Debian and Linux Mint have packages today. An AppImage runs anywhere without installing, though it cannot provide the execution gate, which needs privileges an uninstalled bundle does not have. RPM and Arch packaging exists but is not yet built and published.</p>
</details>
</div>
</div>
</section>
<section>
<div class="wrap">
<div class="kicker">Open source</div>
<h2>You are installing a root daemon that can block execution.</h2>
<p class="sub">
So you should be able to read it. The agent is Apache-2.0 and the definitions are signed
with a key whose public half is compiled into the binary — anyone can verify that what
they received is what we published. What you pay for is the threat feed, the console and
support, not permission to look.
</p>
<div class="cta" style="margin-top:26px;">
<a class="btn ghost" href="https://github.com/HoundAV/hound-antivirus">Read the source</a>
<a class="btn ghost" href="https://defs.houndav.com/index.json">See the definitions index</a>
</div>
</div>
</section>
</main>
<footer>
<div class="wrap foot">
<span>&copy; 2026 Hound</span>
<a href="https://github.com/HoundAV/hound-antivirus">Source</a>
<a href="mailto:support@houndav.com">Support</a>
<a href="https://dl.houndav.com/">Downloads</a>
<a href="/privacy">Privacy</a>
<a href="/terms">Terms</a>
<span class="right mono" style="font-size:12px;">Definitions 2026.08.21 &middot; 235,577 indicators</span>
</div>
<div class="wrap" style="margin-top:16px;">
<p style="font-size:11.5px; line-height:1.6; color:var(--faint); max-width:680px;">Hound is provided as-is without warranty of any kind. No security software can guarantee complete protection against all threats. Hound is one layer of a security strategy, not a substitute for one. See our <a href="/terms" style="color:var(--dim);">terms of service</a> for full details.</p>
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