Dev tools · alternatives · 2026

24 alternatives to upsonar.io

Don't let a CDN outage break your site silently

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.

1. 1
   I made a down detector for down detectorfree▲591

   After down detector went down with the rest of the internet during the Cloudflare outage today I decided to build a robust, independent tool which checks if down detector is down. Enjoy!!

   Nov 2025 · downdetectorsdowndetector.com · its alternatives →

2. 2
   Uptime Monitor▲76

   Get instant alerts when your website goes down.

   2023 · uptime-monitor.io · its alternatives →

3. 3
   Simple Uptime▲203

   Monitor the health of your websites and servers inside Slack

   2024 · simpleuptime.app · its alternatives →

4. 4
   Better Uptime▲144

   Unified observability tool

   2020 · betterstack.com · its alternatives →

5. 5
   Does it use Cloudflare?▲144

   Tool to check if site uses CloudFlare

   2017 · its alternatives →

6. 6
   Uptime Monitor by HetrixTools▲81

   Minimize your downtime by being the first to know about it

   2021 · hetrixtools.com · its alternatives →

7. 7
   Uptime by Linkjar▲64

   Be the first who knows that your website is down

   2021 · its alternatives →

8. 8
   StayUp.dev▲2

   Find out if it’s your server or Cloudflare messing up.

   Nov 2025 · stayup.dev · its alternatives →

9. 9
   easyping.▲110

   Uptime monitoring made super easy 📯.

   2020 · easyping.io · its alternatives →

10. 10
    Is AWS Down? by Taloflow▲58

    Track AWS outages down to the minute

    2022 · taloflow.ai · its alternatives →

11. 11
    elmah.io▲71

    Cloud logging for .NET web applications

    2022 · elmah.io · its alternatives →

12. 12
    Nodown▲67

    Know when your website goes down, before your customers will

    2022 · its alternatives →

13. 13
    Check Cloudflare Cache▲5

    See which resources are properly served from cache.

    2021 · bigballi.com · its alternatives →

14. 14
    Odown▲74

    Simple and reliable uptime monitoring service

    2021 · odown.com · its alternatives →

15. 15
    WebsiteDown.xyz▲12

    Website status checker, uptime monitor & site outage reports

    2025 · websitedown.xyz · its alternatives →

16. 16
    Uptime Monitor▲59

    Monitor your domains uptime with Domaintowers Uptime monitor

    2014 · domaintower.com · its alternatives →

17. 17
    What Broke Today▲6

    Know what's broken before your boss asks

    Jan 2026 · whatbroke.today · its alternatives →

18. 18
    Its simply tool for check is you site POSSIBLE affected to CloudFlare data leaks▲6

    cloudflare, leaks, hack

    2017 · its alternatives →

19. 19
    Server Check.in - inexpensive website uptime monitoring▲32

    Unlimited SMS and email notifications.

    2012 · servercheck.in · its alternatives →

20. 20
    BryZora Uptime Monitoring Services▲17

    Get notified if your websties/server/dns/domain go down 🚨

    2025 · bryzora.com · its alternatives →

21. 21
    Website Uptime Monitoring▲10

    Uptime Guardian for Your Website: Never Miss a Downtime

    2024 · websitemonitoring.pro · its alternatives →

22. 22
    UptimeObserver▲12

    Uptime monitoring for all of your online services

    2025 · uptimeobserver.com · its alternatives →

23. 23
    Stack Status IO▲7

    Real-time cloud service status monitoring dashboard

    2025 · stack-status.io · its alternatives →

24. 24
    MonitorFlare

    Zero-cost uptime monitoring on the Cloudflare free tier

    Aug 2026 · monitorflare.csr.plus · 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 →