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AlertSleep monitors uptime, APIs, ports, and SSL certificates, alerting instantly when something.
Grounded in available product and source data
Finding out a service is down because a customer complained first is already too late — AlertSleep offers 24/7 uptime, API, and SSL monitoring instead, watching infrastructure continuously and alerting the moment something actually breaks.
Coverage goes well beyond a basic ping check. Website Monitoring tracks availability from multiple global locations, API Monitoring watches REST and GraphQL response times and error rates specifically, Page Speed Monitoring tracks Core Web Vitals rather than just uptime, and Port Monitoring checks TCP/UDP ports directly for services that don't run over standard web protocols.
SSL Monitoring closes a gap that uptime checks alone tend to miss — a certificate quietly expiring doesn't take a site down immediately, but it does trigger browser security warnings that scare off visitors, and tracking expiration ahead of time avoids that entirely.
When something does trip an alert, it routes through whatever channel a team already uses — Slack, Telegram, Microsoft Teams, or WhatsApp — rather than requiring everyone to check a separate dashboard. The site states 5,000+ users and 10M+ checks run per month, with a free plan available and no credit card required to start. The page reviewed does not specify how many monitors are included on the free plan specifically, worth checking directly before assuming full coverage across every monitoring type at no cost.
The page reviewed does not describe alert-grouping or deduplication behavior specifically, worth confirming directly before rolling monitoring out across many services at once.
The page reviewed does not price SSL Monitoring separately from the rest of the platform, listing it alongside the other named monitoring types rather than as a distinct add-on.
The page reviewed does not detail per-alert routing rules, worth checking directly for a team that wants API alerts going to engineering while uptime alerts go to a different channel.
The page reviewed does not specify whether a regional outage triggers one consolidated alert or a separate one per monitoring location, worth confirming directly for a service with users in several regions.
