HTTP, TCP, DNS and TLS certificate monitoring from twenty-four regions, with alerting that respects your on-call rota. Flat monthly price — we do not bill per check.
Start free for 14 days See how it worksFive check types cover almost everything people actually page on.
Status code, response body match, redirect chain and total time. Optional assertions on JSON fields.
Raw port reachability with configurable send and expect strings — useful for databases and message brokers.
Record presence and value drift across resolvers. Catches propagation failures your own resolver caches away.
Expiry countdown, chain validity and unexpected issuer changes. Alerts at 30, 14 and 3 days.
A job that stops calling in is an incident. Define an expected interval and a grace window.
Public or password-protected, on your own domain, with subscriber notifications. Included in every plan.
A single failed probe is noise. We confirm from three independent regions before paging anyone, and we tell you which regions disagreed.
| Channel | Latency | Notes |
|---|---|---|
| ~5 s | Per-user digest options | |
| Webhook | <1 s | Signed payloads, retries with backoff |
| SMS and voice | ~10 s | Included allowance, then at cost |
| Slack, Teams, Telegram | ~3 s | Threaded updates until resolution |
| PagerDuty, Opsgenie | ~2 s | Full incident lifecycle sync |