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
All systems operational
Recent activity
All systems operational
Recent activity
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
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
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
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
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
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
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.
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.
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.
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.
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.
Free plan available. No credit card required.
Why Sitewatch exists
200 OK doesn't mean the site works.

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.
- 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
Starter
Everything you need to monitor client sites.
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
Pro
Built for agencies managing 50+ client sites.
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
FAQ
Frequently asked questions
Everything you need to know about Sitewatch and website monitoring.
Uptime monitors only check if your server responds with a 200 status code. Sitewatch runs two types of checks on every site: ping checks (lightweight HTTP probe every 5 minutes for uptime tracking) and integrity checks (full page fetch that validates every asset, inspects headers, and compares against baselines). Broken JavaScript bundles, missing CSS files, MIME mismatches, and redirect loops can all happen while your server returns 200. We catch the failures that uptime tools miss.
Yes. Sitewatch fingerprints every JavaScript and CSS asset on your monitored pages. If a CDN goes down, a deploy breaks a bundle hash, or a third-party script returns a 404, we detect it within minutes and include the full evidence in your incident report.
Absolutely. Many websites rely on third-party scripts for analytics, chat widgets, payment forms, and more. Sitewatch monitors all assets loaded on your pages, including third-party resources, so you know immediately when an external dependency fails.
Sitewatch runs integrity checks on a configurable schedule — from every 5 minutes (Pro) to every 30 minutes (Free), plus 5-minute ping checks on all plans. When an issue is detected, alerts are sent immediately via your configured channels. Email is available on all plans. Starter adds Slack and webhooks. Pro adds PagerDuty, Opsgenie, and SMS (30/month). Most teams receive their first alert within minutes of an issue appearing.
Yes. Our Pro plan includes multi-region monitoring so you can verify that your sites work correctly for users across different geographies. This is especially useful for catching CDN issues that only affect certain regions.
Each incident report includes a plain-English diagnosis (what broke, what users see, how to fix it), affected assets with full URLs, HTTP status codes, business severity level, and a complete timeline. When an incident resolves, a branded client-ready report is auto-generated — choose between a non-technical client template or a detailed technical view. Share via PDF or email link.
Yes. Every incident auto-generates a branded report on resolve, designed for agencies to send directly to clients. The client template uses plain English — no technical jargon. Add your logo, brand colors, and optional agency notes. Share as a PDF or via a unique link — no login required for viewing.
Deploy hooks are webhooks you add to your CI/CD pipeline (Vercel, Netlify, GitHub Actions, or any platform that supports webhooks). When a deploy completes, the webhook triggers an immediate Sitewatch website check — so you know within seconds if something broke, instead of waiting for the next scheduled check.
When Sitewatch detects an issue, it automatically classifies the root cause into one of 10 cause families (like DNS resolution failure, CDN cache misconfiguration, or deployment artifact missing). Each classification includes a confidence score and evidence from the check. No configuration required — it works out of the box.
Sitewatch auto-detects 23 tech stacks including Next.js, Nuxt, Gatsby, WordPress, Shopify, Cloudflare, Vercel, Netlify, AWS CloudFront, Nginx, Apache, and more. When an issue is found, fix steps include platform-specific guidance — like clearing the Cloudflare cache or redeploying on Vercel.
You can click through a page and see if it looks right, but you can't see MIME mismatches by eye, you can't detect host drift from a browser tab, and you certainly can't check 50 sites every hour. Even automated scripts only check what you've told them to check — and they don't deduplicate alerts, diagnose root cause, or generate client reports. Sitewatch validates every linked asset's HTTP status, content type, and fingerprint on every check — catching the silent failures that manual checks and basic scripts miss.
Internal monitoring typically checks what you've configured it to check — server health, specific endpoints, maybe a few status codes. Sitewatch checks what you didn't think to look for: MIME type mismatches, asset fingerprint changes after deploys, redirect chains, host drift, and 7 more failure types that all return 200 OK. It runs continuously across every asset on every monitored page, confirms issues aren't transient with retry logic, diagnoses root cause for 23 tech stacks, and auto-generates branded client reports. It's the layer between your infrastructure monitoring and your customers.
Hosting monitors infrastructure — server CPU, memory, and whether the process is running. They don't check whether your page actually works for visitors. A server returning 200 OK while serving broken JavaScript, missing stylesheets, or redirect loops is invisible to infrastructure monitoring. Sitewatch monitors the customer experience layer that hosting providers don't cover.
Instead of only monitoring the homepage, Sitewatch lets you monitor multiple pages per site — checkout, login, pricing, contact forms, or any page that matters to the business. Each page can be assigned a business importance level (critical, high, normal, low). The Free plan includes 1 page per site, Starter includes 5, and Pro includes 25.
When a deploy happens, Sitewatch automatically runs checks and produces a structured pass/fail/degraded verdict with a before/after comparison showing exactly what changed — asset counts, fingerprint diffs, redirect chain changes. No test scripts required. Just paste a webhook URL into your CI/CD pipeline.
Incident severity is adjusted based on the business importance of the affected page. A medium-severity issue on a checkout page marked as "critical" gets escalated to high severity and bypasses quiet hours. The same issue on a blog page stays medium. This means your team gets woken up for revenue-impacting failures — not blog image issues.
Sitewatch automatically sends branded health summary reports on a schedule — monthly on all plans (including Free), plus weekly on Pro. Each report shows uptime percentage, incidents detected and resolved, and overall site health. Clients view reports via a branded web link with no login required. Set it up once and it runs automatically.
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.