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Website monitoring for agencies, freelancers and dev teams

Your uptime dashboard is green. Your website is still broken.

Uptime tools ping your server. Sitewatch loads the page like a browser, fingerprints every asset, and tells you exactly what broke — even when the server is still returning 200 OK.

  • Catches what 200 OK hides — broken JS bundles, MIME errors, redirect loops, mixed content, security header regressions, and more
  • Root cause in 60 seconds — 10 cause families, stack-specific fix steps for Vercel, WordPress, Cloudflare, Next.js + 19 more
  • 2-of-3 retry, fingerprint dedup, deploy hooks — alerts only when something is actually broken

Free plan  ·  No credit card  ·  Works with any stack

The cost of finding out too late

Broken pages happen every week. Most teams find out from a client email.

Hosting update broke a JS bundle. Checkout dead for 3 days.

A JavaScript bundle 404'd after a hosting update — the page loaded, the server returned 200, and your client's checkout was broken for three days.

Three days of lost conversions. For a client doing $500/day, that's $1,500 — and your agency's credibility.

With Sitewatch

  • Broken bundle detected within an hour
  • Diagnosis and fix steps sent via Slack
  • Client report ready to send before they even notice

Friday 5pm deploy. Bundle hash mismatch. Homepage blank for 60 hours.

A Vercel build changed a bundle hash. The old filename 404'd. The CI pipeline showed green. The homepage was a white screen for 60 hours.

Every paid ad and email campaign sent traffic to a blank page all weekend.

With Sitewatch

  • Deploy hook triggers an instant check
  • Missing bundle flagged with a pass/fail verdict
  • Slack alert sent within minutes

Cloudflare cache rule changed. CSS served as text/plain for 2 weeks.

Cloudflare served a stylesheet with the wrong MIME type after a cache rule change — the browser silently rejected it and visitors saw unstyled HTML for two weeks.

Two weeks of broken styling. Paid traffic budget wasted on a site that looked broken.

With Sitewatch

  • MIME mismatch detected on the next scheduled check
  • Root cause: CDN Misconfiguration, 85% confidence
  • Fix step delivered: "Clear the Cloudflare cache for this zone"

API gateway returned JSON on a page route. 4 hours of debugging.

An API gateway returned a JSON error on a landing page URL. The page looked fine in cached browsers and broken in others. Half a day of debugging.

4 hours of senior engineering time — $600 spent investigating what one alert would have explained in 60 seconds.

With Sitewatch

  • "Non-HTML Response" identified as the failure type
  • Expected vs actual Content-Type shown in the alert
  • Root cause in 60 seconds, not 4 hours
Stop finding out from your clients

Start free — monitor in 60 seconds. No credit card required.

What you get

Five jobs Sitewatch does that uptime tools can't

Portfolio monitoring, deploy verification, asset integrity, API contracts, and full security posture — all on the same check that runs every few minutes.

Find broken client sites before the client email arrives

A broken client site you don't know about is a client call you're not ready for. Sitewatch monitors checkout, login, and revenue pages across your entire portfolio — so you find out first, not your client.

  • Monitor checkout, login, and revenue pages — not just the homepage
  • Tag sites by client and see per-client health at a glance
  • Incident reports and health summaries auto-generated and branded
  • Business severity scoring — broken checkout = wake-up call, broken blog image = morning notification
Learn more about agency monitoring

Catch the failures that break your site while uptime says it's fine

Every broken JavaScript bundle is a silent conversion killer. Your server returns 200, your analytics show traffic, but nothing loads. Sitewatch fingerprints every asset and flags failures — even when your server says everything is fine.

  • Asset fingerprinting catches hash mismatches after deploys
  • Deploy hooks trigger instant checks after every ship
  • Broken JS/CSS, missing images, 404 errors — all surfaced with evidence
  • Reports show exactly what changed, when, and what to do about it
Learn more about asset monitoring

Verify every deploy automatically — no test scripts required

Paste a webhook URL into your CI/CD pipeline. Every deploy triggers an automatic check — Vercel, Netlify, GitHub Actions, or any platform with webhooks. Get a pass/fail/degraded verdict with a before/after diff showing exactly what changed.

  • Pass/fail/degraded verdict after every deploy
  • Before/after diff — asset counts, fingerprint changes, redirect shifts
  • Zero-config setup — one webhook URL, no test scripts
  • Incidents tagged with deploy context for instant debugging
Learn more about deploy verification

Monitor the APIs your frontend depends on

APIs fail silently — wrong status codes, changed response structures, missing fields. Sitewatch monitors your endpoints and catches backend problems before they break the frontend.

  • Validate response status codes and payload structure
  • JSONPath matching to verify critical response fields
  • Configurable severity thresholds per endpoint
Learn more about API monitoring

Monitor your full security posture — certificates, headers, and mixed content

A valid SSL cert is just the start. Sitewatch monitors every layer of your site's security — from TLS handshake to response headers to page content. Security header regression alerts tell you the moment a deployment strips a header that was previously present. No other monitoring tool does this.

  • SSL expiry monitored continuously — alerted 30 days before expiry
  • Security header regression alerts — know when a deploy removes CSP, HSTS, or X-Frame-Options
  • Mixed content detection — catches HTTP resources on HTTPS pages before visitors see "Not Secure"
  • Domain registration tracked automatically — no WHOIS tools, no manual reminders
Learn more about security monitoring
Start monitoring your client sites — free

No credit card required. Set up in 60 seconds.

What happens when something breaks

From broken page to client report in minutes

Every check fingerprints your assets, traces redirects, and validates responses. When something breaks, you'll know in minutes — not when your client calls.

01

A real check, not a ping

Scheduled checks and deploy hooks fetch your pages, parse the HTML, and verify every linked asset. A 2-of-3 retry confirmation rules out transient blips. When Sitewatch alerts, it's confirmed.

02

Plain-English root cause in 60 seconds

Every failure is classified into one of 10 cause families — CDN Misconfiguration, Deployment Artifact, Redirect Misconfiguration, and more. You get a plain-English diagnosis: what broke, what users see, and fix steps specific to your stack. 23 platforms supported.

03

The right person, only when it's real

The right person gets notified through the right channel — Slack, email, SMS, webhooks, PagerDuty, or Opsgenie. Business severity scoring adjusts priority based on page importance. A broken checkout page bypasses quiet hours. A broken blog image doesn't.

04

Client-ready before they email you

When the incident resolves, a branded client report is auto-generated — timeline, root cause, fix applied, resolution status. Plain English, no jargon. Share as a PDF or unique link. Health summaries sent to clients monthly on all plans (weekly on Pro), automatically.

Uptime monitoring vs Sitewatch

You don't need to replace your uptime tool. You need to fill the gap above it.

Revenue pages protected

Server responds with 200 — broken checkout, login, and payment pages go undetected

Every asset on checkout, login, pricing, and landing pages validated on every check. Broken JS that kills conversions is caught before customers notice.

Time to understand the problem

"Site down" with a status code — you investigate from there

60 seconds. Plain-English diagnosis with root cause, affected pages, user impact, and stack-specific fix steps.

Alert fatigue

Single-check alerts — transient blips trigger pages at 3 AM

Confirmed alerts only. 2-of-3 retry filters transients, fingerprint dedup collapses repeat alerts for the same root cause, 30-minute cooldown prevents storms.

Time to fix

Hours — you investigate from scratch across logs, CDN configs, and deploy history

Minutes. Prioritized fix steps specific to your platform — Vercel, Cloudflare, WordPress, Next.js, and 19 more.

Client trust

Manual status updates and incident summaries — hours of agency time per incident

Automatic. Branded reports generated on resolve. Monthly health summaries sent to clients with no manual effort.

Post-deploy confidence

No post-deploy checks — you hope nothing broke

Immediate. Webhook fires, check runs, pass/fail verdict delivered with before/after diff. Know in seconds, not hours.

Uptime tools tell you the server answered. Sitewatch tells you the page worked. That's the gap above your monitoring stack.

Try it free — see the difference yourself

Free plan available. No credit card required.

Why Sitewatch exists

200 OK doesn't mean the site works.

Nicky Christensen, Founder of Sitewatch

Nobody was checking what actually loaded in the browser. So I built something that does.

After 15 years building sites for clients, the story was always the same: deploy goes live, monitoring stays green, client finds the problem first. Checkout broken, forms dead, scripts 404ing — all while the server returned 200 OK. Sitewatch is the layer that watches what your uptime tool can't see.

Nicky Christensen

Founder, Sitewatch

Pricing

One caught incident pays for a year of monitoring.

Free plan covers your own projects. Starter and Pro are built for agencies managing client portfolios.

Free

Monitor your own projects for free.

$0/month
  • 1 site monitored
  • 1 monitored page per site
  • 30-min integrity checks
  • 5-min ping checks
  • 1 region (Europe)
  • All detection rules (assets, headers, SSL, perf)
  • Plain-English diagnosis
  • Business severity scoring
  • Incident reports on resolve
  • Monthly auto-reports
  • Email alerts
  • Evidence dashboard
  • 7-day data retention
Start free

Starter

Everything you need to monitor client sites.

$9/month

7-day free trial

  • 25 sites monitored
  • 5 monitored pages per site
  • 15-min integrity checks (configurable)
  • 5-min ping checks
  • 1 region (Europe)
  • 5 API monitors (every 6 hrs)
  • Email, Slack & webhook alerts
  • 3 deploy hooks (50/day)
  • 1 public status page
  • Monthly auto-reports
  • 5 team members
  • 30-day data retention
Get Starter
Best for agencies

Pro

Built for agencies managing 50+ client sites.

$19/month

7-day free trial

Everything in Starter, plus:

  • 100 sites monitored
  • 25 monitored pages per site
  • 5-min integrity checks (configurable)
  • 25 API monitors (30 min – 24 hrs)
  • 2 regions (EU + US)
  • All 6 alert channels incl. SMS (30/mo)
  • Weekly + monthly auto-reports
  • 10 deploy hooks (200/day)
  • Unlimited status pages (advanced customization)
  • Bundle reports
  • Custom report branding
  • 20 team members
  • 90-day data retention
Start with Pro

FAQ

Frequently asked questions

Everything you need to know about Sitewatch and website monitoring.

Paste a URL. Find out in 60 seconds what your uptime tool has been missing.

Every asset fetched, every redirect followed, every header validated, every fingerprint checked. If something's broken, you'll see exactly what — and how to fix it.

Free plan available. No credit card required.