One audit grades what runs a site, how current it is, how well it's built - and how ready it is for the AI web.
Free plan - 5 audits a month. No card required.
Decay has a shape.
Each mode fails on its own schedule. None of them announce themselves in a deploy log - and all three are visible from outside.
End of life
A runtime stops receiving patches on a date published years in advance. Nothing changes on your site that day. The fixes just stop arriving, and every later flaw stays open.
Detected as version vs. release calendar.
Known vulnerabilities
A vulnerability is published against a version you already run. The disclosure is public before your update is - the window between the two is the whole risk.
Detected as version matched to advisories.
Quality drift
A third-party script here, an uncompressed image there, one more redirect. Each change is small enough to approve. The measurement moves anyway, and it only moves one way.
Detected as Lighthouse + field data.
A website is a stack. We cut it open.
Every layer that serves your site, graded in place - and the weakest one flagged where it sits.
One score. Four audited dimensions.
No black box: weighted across technology choice, version health, engineering quality and AI-readiness - methodology published.
How good are the choices?
Each detected technology is ranked inside its category by npm downloads and GitHub stars - the audit measures the quality of choices, not the quantity.
How current are the versions?
Every version is measured against its release history. Falling behind costs points; staying current pays them back.
How well is it built?
Lighthouse results across four categories that count equally - PWA is deliberately out. A fast page that fails accessibility still loses points.
Can AI agents read your site?
llms.txt, agent access rules, structured data, content without JavaScript - graded A-F on every new audit. Counts as the fourth dimension of the score, methodology 2026.08.
Four tools. One audit engine.
One engine: 5,000+ technologies, version intelligence, Lighthouse-grade quality.
Audit any website on demand.
The full picture in about 2 minutes - every technology with version, vulnerabilities, quality metrics and the score history over time.
Every technology, catalogued.
Browse the 5,000+ technologies we detect across 105 categories - and see how the audit grades each one it finds on your stack.
- 5,000+ technologies detected
- 105 categories
- Version intelligence from release history
- npm downloads & GitHub stars on every audited tech
Know the moment a stack changes.
Scheduled re-audits of the sites you care about - yours, your clients', your competitors'. Get the diff, not the noise.
The same audit, programmable.
Start audits, poll status, pull full results - score and the complete technology list - into CI gates, dashboards or your own product, or expose the audit to coding agents over MCP.
POST /api/v2/audits { "url": "https://github.com" } 202 Accepted -> GET /api/v2/audits/{id} { "score": 96, "band": "high", "scores": { "technology": 97, "upToDateness": 94, "quality": 95, "aiReadiness": 30 }, "technologies": [ { "title": "Ruby on Rails", "version": "8.0.2", "versionStatus": "present" }, { "title": "MySQL", "version": "9.3.1", "latestVersion": "9.4.0" }, ... 14 more ] }
The audit is a snapshot.
Stack Watch keeps reading.
One audit tells you where a stack stands today. Stack Watch keeps checking after you close the tab and writes to you only when something moves.
- A CVE is published for a version you are running
- A technology reaches its end-of-life date
- A version drifts further behind its release history
- A TLS certificate approaches expiry
- The Awesomeness Score crosses a band
Alert feed
examplestore.comexampleBuilt for people who answer for websites.
Agencies
Sell the audit, keep the retainer - branded reports and monthly client digests for every site you manage.
Developers & freelancers
Watch your own sites and your competitors'. Catch version drift and quality regressions before they page you.
Site owners
One number tells you where you stand - and the audit tells your developers exactly what to fix.
Security
Live-site vulnerabilities, end-of-life and version freshness - reconnaissance without an agent.
Watch your stack. From free.
One-off audits are the free taste - the subscription is the watching: alerts, history, branded reports.
Prices exclude VAT / sales tax - calculated at checkout.