Dev tools · alternatives · 2026

24 alternatives to OnlineOrNot

We alert you before your customers do.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. OnlineOrNot launched in 2019; newer entries below may have overtaken it.

1. 1
   OnlineOrNot Browser Checks▲5

   Browser-based uptime checks for your critical pages.

   2021 · its alternatives →

2. 2
   Uptime Monster▲208

   Monitor your websites and servers from one place

   2024 · uptimemonster.com · its alternatives →

3. 3IM
   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 →

4. 4
   Hyperping▲351

   Uptime monitoring made beautifully simple and reliable

   2018 · its alternatives →

5. 5
   Uptime Monitor▲76

   Get instant alerts when your website goes down.

   2023 · its alternatives →

6. 6
   Pulsetic▲204

   Status pages and website uptime checker—no expert needed!

   2024 · pulsetic.com · its alternatives →

7. 7
   updown.io▲112

   Simple & Inexpensive Website Monitoring.

   2015 · its alternatives →

8. 8
   Odown▲74

   Simple and reliable uptime monitoring service

   2021 · its alternatives →

9. 9UI
   Updown.io, a simple and cheap website monitoring service▲38

   2014 · updown.io · its alternatives →

10. 10UW
    Uptime.website – A free uptime check tool▲11

    2024 · uptime.website · its alternatives →

11. 11
    Web-alert.io — Uptime Monitoring▲7

    Instant uptime alerts. Stay online, stay confident.

    Dec 2025 · web-alert.io · its alternatives →

12. 12
    Checkify▲77

    Super minimal, simple and inexpensive 24/7 uptime monitoring

    2021 · its alternatives →

13. 13
    DTEKT▲70

    Website uptime and performance monitoring

    2021 · its alternatives →

14. 14
    Dialogs Monitor▲16

    Simple, easy to use and free website uptime monitoring tool

    2025 · dialogsmonitor.com · its alternatives →

15. 15
    UptimeMonitor▲8

    Self-hosted monitoring tool

    2025 · github.com · its alternatives →

16. 16
    WebRadar▲8

    Analyze your website health and social presence.

    2025 · webradar.net · its alternatives →

17. 17
    Uppi▲34

    Uptime monitoring and alerting, open-source & free

    2025 · its alternatives →

18. 18
    SpeedMonitor▲10

    Automate your website's page speed testing for free!

    2019 · its alternatives →

19. 19
    UpTimeTools▲11

    Website Uptime Monitoring Service

    2025 · uptimetools.net · its alternatives →

20. 20SC
    Server Check.in - inexpensive website uptime monitoring▲32

    2012 · servercheck.in · its alternatives →

21. 21
    DownChecker▲11

    Free website monitoring service - keep websites in check

    2025 · downchecker.bekhruz.com · its alternatives →

22. 22
    DownOrNot▲6

    Is a Website Down? Find Out Instantly!

    2025 · downornot.net · its alternatives →

23. 23WA
    What are the best features you want to find in uptime monitoring?▲14

    2021 · odown.io · its alternatives →

24. 24
    Webstatus247▲7

    website analytics

    Sep 2025 · webstatus247.com · 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 →