Overwatch: Open-source uptime monitor and alerting
Single Go binary beats Uptime Kuma for CLI-first teams who hate containers.

No-account email alerts for FDA pet food recalls beat manual database checking.
Pet owners concerned about food safety
Recall Alert · Pet Food Recall App
Single Go binary beats Uptime Kuma for CLI-first teams who hate containers.
Telegram-first alerting is the product's personality — there are website/API/cron/SSL checks and an explicit "Start without email" flow that keeps signup friction low. The retro terminal UI is tasteful and suggests an MVP you can click through fast, but it doesn't yet offer a clear feature advantage over established uptime tools unless Telegram-only delivery is your hard requirement.
Claude-powered pricing surveillance with plain-English change summaries. Free tier included.
Heartbeat monitoring without the 4-tool sprawl, but early-stage and unproven at scale.
Useful passive monitoring, but AirNow and PurpleAir already cover this for free.
Well-built but monitors APIs same way Betterstack, UptimeRobot, and 20 others do.