Synthetic monitoring alternative
Monitor production without writing a single test script
Synthetic monitoring tools like Checkly and Datadog Synthetic require you to write and maintain test scripts for every scenario you want to monitor. Sitewatch takes a different approach: it automatically discovers and validates every asset on every page — JS bundles, stylesheets, third-party scripts, redirect chains — with zero scripting. Add a URL, get monitoring in 60 seconds.
- Zero test scripts: Sitewatch discovers and checks assets automatically
- 11 detection rules: MIME types, HTTP status, SHA-256 fingerprints, redirect chains
- Deploy hooks: verify production the moment your deploy completes — no test script needed
Free scan
Scan your site right now — zero setup
See what Sitewatch catches that test scripts miss.
No scripts required
Everything Sitewatch monitors automatically
Zero test scripts
Sitewatch fetches your pages, parses the HTML, and validates every linked asset automatically. No Playwright scripts, no test maintenance — just paste your URL and monitoring starts.
MIME type validation
Catches JS served as HTML, CSS served as plain text, and any asset delivered with the wrong content type. These failures return 200 OK so synthetic scripts miss them unless you explicitly assert MIME types.
SHA-256 fingerprinting
Every asset is fingerprinted with SHA-256. When a file changes between deploys — intentionally or not — Sitewatch detects it immediately without any scripted assertions.
Third-party script monitoring
Stripe, Intercom, analytics, chat widgets — every third-party dependency on your page is checked on every monitoring interval. If Stripe.js 404s, you know before your users do.
Deploy hooks
Trigger verification automatically the moment your deploy completes via Vercel, Netlify, or GitHub Actions webhooks. No test script needed — Sitewatch re-validates every asset on the deployed page.
Plain-English diagnosis
When something breaks, you get the exact asset, the failure type, and what it means — not raw script output or assertion failures to decode. What broke, which asset, why it matters.
zero
test scripts required
60 sec
setup time
11
detection rules
Side by side
Synthetic monitoring vs Sitewatch asset monitoring
| Feature | Synthetic monitoring (Checkly / Playwright) | Sitewatch asset monitoring |
|---|---|---|
| Requires writing test scripts | Yes — JavaScript/TypeScript required | No — zero scripts, zero config |
| Automatic asset discovery | No — only checks what you script | Yes — every JS, CSS, image, font, third-party script |
| Catches MIME type mismatches | Only if explicitly asserted in scripts | Automatic on every check |
| Setup time | 60 minutes (write, test, deploy scripts) | 60 seconds (paste URL, done) |
| Maintenance burden | Scripts rot as UI changes — constant upkeep | Zero maintenance — adapts automatically |
| Catches third-party script outages | Only if you script the check | Every third-party asset checked automatically |
| Deploy hook integration | Yes (CLI + CI) | Yes (Vercel, Netlify, GitHub Actions) |
| Plain-English diagnosis | Raw assertion failure output | What broke, which asset, why it matters |
Requires writing test scripts
Automatic asset discovery
Catches MIME type mismatches
Setup time
Maintenance burden
Catches third-party script outages
Deploy hook integration
Plain-English diagnosis
Simple by design
From URL to full monitoring in 60 seconds
Add your URL — no scripts, no config
Paste the URL you want to monitor. No test scripts to write, no browser automation to configure, no CI pipeline to wire up. One URL is all Sitewatch needs.
Sitewatch crawls your page and discovers every asset
Sitewatch fetches your page, parses the HTML, and builds a complete inventory of every linked script, stylesheet, image, font, and third-party dependency.
Each asset is checked on every monitoring interval
HTTP status, MIME content type, and SHA-256 fingerprint — all validated on every check. New assets added to the page are discovered and checked automatically.
Alerts with diagnosis if anything changes or breaks
When an asset fails, you get an alert with the exact file path, failure type, and a plain-English explanation of what it means — no script output to parse.
Stop writing monitoring scripts.
Sitewatch monitors your production site automatically — from $0.
FAQ
Frequently asked questions
Checkly and Playwright require you to write test scripts that simulate specific user interactions. If you want to check that a button exists, you write a script to find it. If you want to check that an asset loads, you write an assertion for it. Sitewatch requires no scripts — it automatically discovers every asset on your pages and validates them all. You get coverage across your entire page without writing a single line of code.
Yes, for complex multi-step interactions like login, checkout, or form submissions, synthetic tools like Checkly remain the right choice. Sitewatch handles the asset layer — the JS bundles, stylesheets, and third-party scripts that power those flows. Many teams run both: synthetic tests for user journeys, Sitewatch for resource-level validation. The two approaches are complementary, not mutually exclusive.
Checkly only catches what you explicitly script. If a new JS dependency gets added to your page and nobody updates the Playwright tests, it won't be caught. Sitewatch catches it automatically — any new asset on the page is discovered and validated without configuration. It also catches MIME type mismatches (a CSS file served as text/html), SHA-256 fingerprint changes between deploys, and third-party script outages — all without any test scripts.
About 60 seconds. Paste your URL, Sitewatch runs its first check immediately. Connect alert channels (Slack, email, PagerDuty) and you're fully set up. Compare that to a Checkly setup: writing Playwright scripts, testing them locally, deploying them to Checkly, and wiring up CI hooks — easily 60 minutes for a single page.
Yes. Sitewatch fetches your page over HTTP and parses the HTML, which includes all statically referenced assets in script and link tags. For SPAs that inject assets dynamically at runtime, Sitewatch validates the initially referenced bundles — the entry points your app loads. If you have dynamically loaded chunks that aren't linked in the HTML, those won't be discovered automatically, but the core bundle and stylesheet validation still applies.
Explore more
Related pages
Sitewatch vs Checkly
Full feature comparison: script-free monitoring vs Playwright tests.
Sitewatch vs Datadog Synthetic
Zero-script asset monitoring vs enterprise synthetic testing.
Synthetic Monitoring Feature
How Sitewatch's automatic asset validation works under the hood.
For Dev Teams
Deploy hooks, asset fingerprinting, and zero-config monitoring for engineers.
Deploy Verification Reports
Automatic post-deploy verification without writing test scripts.
Website Monitoring
Full-page monitoring that goes beyond uptime checks.