AI · alternatives · 2026

24 alternatives to Watcher37

Get notified when web pages change, encrypted.

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. Watcher37 launched in 2023; newer entries below may have overtaken it.

1. 1IB
   I built a tool that watches webpages and exposes changes as RSS▲320

   I built Site Spy after missing a visa appointment slot because a government page changed and I didn’t notice for two weeks. It watches webpages for changes and shows the result like a diff. The part I think HN might find interesting is that it can monitor a specific element on a page, not just the whole page, and it can expose changes as RSS feeds. So instead of tracking an entire noisy page, you can watch just a price, a stock status, a headline, or a specific content block. When it changes, you can inspect the diff, browse the snapshot history, or follow the updates in an RSS reader. It’s…

   Mar 2026 · sitespy.app · its alternatives →

2. 2
   Changed▲169

   Monitor and get push notifications when a website changes

   2018 · its alternatives →

3. 3
   Notifyz▲145

   Create, Subscribe, Notify All in One Place

   2024 · its alternatives →

4. 4
   Pulsetic▲240

   Website uptime monitoring, alerts, status pages & badges

   2022 · its alternatives →

5. 5GN
   Get notified when sites update their terms of service▲190

   After reading about what happened with NightOwl yesterday [0], I thought about what it would take to be aware of things like that in the future. I created ToSNotify to automatically notify you when a website's terms change. A harder problem I've been thinking through is how to know which terms to track, since it'd be a pain to add every site I have an account with. One idea I had is to automatically get terms for apps you have installed from the app store. Any other ideas/feedback are appreciated! [0]: https://news.ycombinator.com/item?id=37052508

   2023 · tosnotify.com · its alternatives →

6. 6
   Crypto Notifications for Metamask▲156

   Telegram & Email notifications for crypto & NFT transactions

   2023 · its alternatives →

7. 7
   Checkify▲77

   Super minimal, simple and inexpensive 24/7 uptime monitoring

   2021 · its alternatives →

8. 8MW
   Monitor websites for changes. Get alerted by Email, Slack and Telegram▲8

   2021 · webtrackr.io · its alternatives →

9. 9
   Pulsetic▲204

   Status pages and website uptime checker—no expert needed!

   2024 · its alternatives →

10. 10CI
    Changedetection.io detect changes in websites and JSON feeds▲147

    2022 · github.com · its alternatives →

11. 11
    PHunted▲190

    Be notified if a site you're browsing has been hunted or not

    2014 · its alternatives →

12. 12
    DomainWatchBot▲116

    A bot that tells you when your domains are about to expire

    2017 · its alternatives →

13. 13
    ChangeTower▲149

    Get emailed when website content changes

    2018 · its alternatives →

14. 14
    The Witness▲8

    When a page updates, you understand why.

    Feb 2026 · its alternatives →

15. 15
    Site Alerts▲108

    Instant insights on any website

    2014 · its alternatives →

16. 16
    VisualPing▲133

    Get notified on visual changes of a website or website area

    2014 · its alternatives →

17. 17
    Notify Me▲22

    Simple website update tracking and monitoring tool

    2024 · its alternatives →

18. 18DG
    DomainWatch – Get notified when a domain becomes availablefree tier, from $5/mo▲25

    2018 · domainwatch.me · its alternatives →

19. 19
    Uptime Monitor▲76

    Get instant alerts when your website goes down.

    2023 · its alternatives →

20. 20AC
    A Chrome extension to see notifications for comments on your HN threads▲79

    2021 · chrome.google.com · its alternatives →

21. 21DG
    Dffer – Get notified when a website changes▲63

    2017 · dffer.com · its alternatives →

22. 22MA
    Monitor a Hacker News post over time▲78

    2020 · hacker-news-analytics.christianfei.com · its alternatives →

23. 23
    ChangeWatch▲6

    Website change alerts, made simple.

    Jan 2026 · changewatch.vercel.app · its alternatives →

24. 24
    PingWatch — Uptime Monitoring▲16

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

    Jun 2026 · pingwatch.netlify.app · 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 →