Alternatives

Products that do what Watchdog does

Know your site is down before your client does

1. 1
   Pulsetic▲412

   Know when your site is down before your customers do

   2020

2. 2
   Apollo▲101

   Reliable uptime monitoring, status pages & much more

   2020

3. 3
   DownNotifier▲139

   Get an alert when your website is down 🚨

   2016

4. 4
   Monitor v2 [Retired]▲129

   Alert your entire team when your site goes offline.

   2015

5. 5
   UptimeRobot App 2.0▲199

   Web, SSL, ports & Cron-jobs monitoring

   2021

6. 6
   Simple Uptime▲203

   Monitor the health of your websites and servers inside Slack

   2024

7. 7
   UptimeWatchdog▲2

   Know when your website goes down before your users do.

   May 2026 · uptimewatchdog.com

8. 8
   Whydown▲3

   Website monitoring with instant downtime alerts.

   Jul 2026 · whydown.org

9. 9
   ApiChecker▲104

   Reliable uptime and performance monitoring for your services

   2019

10. 10
    SiteIsDead.dev▲11

    Phone alerts for website downtime | real-time monitoring

    Nov 2025 · siteisdead.dev

11. 11
    Tell Me When Down▲6

    Uptime monitoring & a free website security scan

    Jul 2026 · tellmewhendown.com

12. 12
    PingWatch — Uptime Monitoring▲16

    Monitor your websites 24/7. Get instant downtime alerts.

    Jun 2026 · pingwatch.netlify.app

13. 13
    24/7 Uptime, SSL & SEO Alerts▲8

    Website monitoring & health checks

    2025

14. 14
    SiteSentry▲1

    Get alerted the second your site goes down.

    7d ago · usesitesentry.com

15. 15
    URLWatch.io Website Monitoring tool.▲3

    Check any website up/down Status? SSL issues & more.

    27d ago · urlwatch.io

16. 16
    IsDown▲10

    Be the first to know when vendors go down

    2025

17. 17
    AlertsDown▲5

    Simple uptime/SSL monitor with instant alerts

    Dec 2025 · alertsdown.com

18. 18
    Outage Observer▲8

    Get notified when any service in your stack has issues

    Jun 2026 · outage.observer

19. 19
    SSL Monitoring Solution▲6

    Monitor SSL certs and avoid unexpected downtime

    2025

20. 20EC
    Erlywarn, Clever Uptime Monitoring. Any thoughts?▲11

    We launched an early version of our uptime monitoring service Erlywarn to the public this week. http://erlywarn.com The project was scratching an itch that monitoring services would only alert you if your site went down and not if they started responding slowly or erratically. So we built Erlywarn to keep track of the response times and allow it to send notifications if your site responds unusually, as this is often an early warning sign that something is starting to go wrong. It's only been 2 weeks from conception to this, so feedback would be most welcome, especially: Would you consider…

    2011

21. 21
    webdog.ai▲14

    Open source web monitoring service

    Jul 2026 · webdog.ai

22. 22
    SafeWebAlerts▲6

    Is Your Website Up or Down? Monitor It 24/7

    Oct 2025

23. 23IB
    I built a tool that texts you if your server goes down▲21

    2025 · yourserverisdown.com

24. 24
    Downdar▲4

    Uptime, cron & SSL monitoring in one dashboard

    Jul 2026 · downdar.com

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