Website Health, Delivered by Email

No. SiteLetter runs entirely from our servers. You just provide the URL, and we handle the monitoring externally. No scripts, no plugins, no performance overhead on your end.

Uptime is checked continuously — as often as every minute when something looks unstable, easing back to a few minutes apart on sites that have been healthy for a while. The moment a site starts flapping, we're back to the fastest cadence. Lighthouse, visual scans, SSL, domain expiry, and broken links run daily.

Yes. Each project can hold multiple sites. Add as many client hostnames as you need — billing scales per site, and you manage everything from one dashboard.

Yes. You invite client emails as report recipients — they confirm via a one-time link, and then reports land in their inbox on your schedule, with your branding. No SiteLetter login needed on their end.

When we detect a visual change on your site, AI classifies it as dynamic content (ads, banners — auto-dismissed), an intentional update (content edit — noted in your report), or something broken (missing images, layout issues — urgent alert). You only hear about what matters. This applies to visual scans only — uptime, SSL, domain, and performance alerts use straightforward thresholds.

We take daily screenshots of your key pages and compare them to a baseline. When something changes, we highlight the affected area and AI classifies whether it's a real issue or expected content rotation — so you can act before clients notice.

Absolutely. There are no long-term contracts. Cancel anytime from your dashboard or Stripe's portal — no questions asked.

Currently, we only monitor public-facing pages. Support for Basic Auth and custom headers for staging environments is on our roadmap.