how do I start to build an uptime monitoring system such as UptimeRobot or OnlineOrNot?

This page summarizes the projects mentioned and recommended in the original post on

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  • gatus

    ⛑ Automated developer-oriented status page

    We use a self-hosted Gatus at work:

  • blackbox_exporter

    Blackbox prober exporter

    Prometheus blackbox_exporter. Free and open source.

  • InfluxDB

    Access the most powerful time series database as a service. Ingest, store, & analyze all types of time series data in a fully-managed, purpose-built database. Keep data forever with low-cost storage and superior data compression.

  • uptime-kuma

    A fancy self-hosted monitoring tool

  • gocron

    Easy and fluent Go cron scheduling. This is a fork from (by go-co-op)

    Never used it but I read about it here on reddit:

  • unfoldedip

    Unfolded is a distributed monitoring service for checking the availability of hosts or single services (TCP, HTTP, PING) in one or several networks.

  • SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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