Dev tools · alternatives · 2026

Checkup is an open-source uptime monitoring tool designed for developers. It tracks whether websites and services are available and running properly. Built to be accessible to technical users, the tool allows… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Checkup, an open-source uptime monitoring tool built for developers launched in 2016; newer entries below may have overtaken it.

1. 1CO
   Checkup – OSS tool for simple, self-hosted health checks▲79

   2016 · text.sourcegraph.com · its alternatives →

2. 2
   I made tool that let's you see everything about any website▲411

   Yes, it's open source: https://github.com/lissy93/web-check :) Why I'm building this? There are a lot of tools out there for discovering meta and security data relating to a website, IP or server. But currently, there isn't anything that does everything, all in one place and without a paywall/ user sign up. It's still a WIP, and I'm working on a new version, with some more comprehensive checks, so any feedback would be much appreciated :)

   2024 · v1.web-check.xyz · its alternatives →

3. 3
   UpUp▲306

   Make sure your sites work even when your users are offline

   2015 · talater.com · its alternatives →

4. 4
   Checkup▲3

   Open source, self hosted, uptime monitor for developers

   2016 · sourcegraph.github.io · its alternatives →

5. 5
   updown.io▲112

   Simple & Inexpensive Website Monitoring.

   2015 · updown.io · its alternatives →

6. 6UW
   Uptime.website – A free uptime check tool▲11

   2024 · uptime.website · its alternatives →

7. 7
   Uptime Monitor▲76

   Get instant alerts when your website goes down.

   2023 · uptime-monitor.io · its alternatives →

8. 8
   Checkly 2.0▲209

   Monitor your modern web app in 1 minute. Free dev plan!

   2021 · checklyhq.com · its alternatives →

9. 9
   Uptime Monster▲208

   Monitor your websites and servers from one place

   2024 · uptimemonster.com · its alternatives →

10. 10
    Uppi▲34

    Uptime monitoring and alerting, open-source & free

    2025 · its alternatives →

11. 11
    Odown▲74

    Simple and reliable uptime monitoring service

    2021 · odown.com · its alternatives →

12. 12
    Updown.io, a simple and cheap website monitoring service▲38

    ϟ Website monitoring — beautiful, simple and inexpensive.

    2014 · updown.io · its alternatives →

13. 13
    My Site Up/Down Checker - Checking Globally▲11

    2012 · wheresitup.com · its alternatives →

14. 14
    Simple Uptime▲203

    Monitor the health of your websites and servers inside Slack

    2024 · simpleuptime.app · its alternatives →

15. 15
    Up Ninja▲128

    Simple and affordable uptime monitors and status pages

    2020 · upninja.io · its alternatives →

16. 16
    CheckCle▲12

    A self-hosted open-source

    2025 · checkcle.io · its alternatives →

17. 17
    Uptimepage▲12

    Open-source monitoring + status page, driven as code.

    Jul 2026 · uptimepage.dev · its alternatives →

18. 18
    ApiChecker▲104

    Reliable uptime and performance monitoring for your services

    2019 · its alternatives →

19. 19
    Uptrace – open-source APM (alternative to Datadog, NewRelic)▲85

    Open source APM: OpenTelemetry traces, metrics, and logs - uptrace/uptrace

    2023 · github.com · its alternatives →

20. 20
    Curler▲123

    Dead Simple Free Uptime Monitoring

    2019 · its alternatives →

21. 21
    What are the best features you want to find in uptime monitoring?▲14

    Simple website uptime monitoring tool to monitor your websites and APIs combined with public status pages. We'll also monitor your SSL certificates and notify you you through multiple alert channels if something happens.

    2021 · odown.io · its alternatives →

22. 22
    Checkly is now free for developers▲10

    Discover Checkly's affordable pricing for synthetic monitoring made for projects of any scope and scale. Choose the perfect plan for your requirements.

    2021 · checklyhq.com · its alternatives →

23. 23
    Server Check.in - inexpensive website uptime monitoring▲32

    Unlimited SMS and email notifications.

    2012 · servercheck.in · its alternatives →

24. 24
    Checker▲124

    Detect fake signups in under 200ms with an easy-to-use API

    2025 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →