Uptime monitoring + status pages in one product. Monitor goes down, status page updates, subscribers get emailed. Setup in 5 minutes for free. Existing options are either self-hosted (costs time), full observability platforms (complex + expensive), or status-page-only tools (clunky + expensive). Upwarden just does the middle part. HTTP, TCP, DNS, WebSocket, Ping, Heartbeat monitoring down to 30s. 7 status page themes. Incident lifecycle. 8 notification channels. REST API. Free tier available.