Life & fun · alternatives · 2026

Dffer monitors websites and sends notifications when they change. It's designed for people who want to track updates on specific web pages without manually checking them repeatedly. The tool automatically detects… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Dffer – Get notified when a website changes launched in 2017; newer entries below may have overtaken it.

1. 1
   Differ▲7

   Dffer sends notifications for website changes

   2017 · its alternatives →

2. 2
   Changed▲169

   Monitor and get push notifications when a website changes

   2018 · apps.apple.com · its alternatives →

3. 3
   Changedetection.io detect changes in websites and JSON feeds▲147

   Best and simplest tool for website change detection, web page monitoring, and website change alerts. Perfect for tracking content changes, price drops, restock alerts, and website defacement monitoring—all for free or enjoy our SaaS plan! - dgtlmoon/changedetection.io

   2022 · github.com · its alternatives →

4. 4ME
   Monitorbook – Easily track anything on the web▲134

   2014 · monitorbook.com · its alternatives →

5. 5
   Monitor websites for change and get scraped data in a webhook▲49

   Monitor website changes around the clock and get alerts in Discord, Telegram, Slack, Google Sheets and many more apps - no code or technical skills needed!

   2019 · monitoro.xyz · its alternatives →

6. 6
   Web Monitoring by Visualping▲196

   Email alert when something changes on a webpage

   2017 · visualping.io · its alternatives →

7. 7
   VisualPing▲133

   Get notified on visual changes of a website or website area

   2014 · visualping.io · its alternatives →

8. 8
   Sleeping Spider▲103

   Web page change monitor - track changes on any site.

   2014 · its alternatives →

9. 9
   Monitorbook▲294

   Easily track anything on the web

   2014 · its alternatives →

10. 10
    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 →

11. 11TW
    Track when any website adds or removes anything▲11

    2014 · insights.nerdydata.com · its alternatives →

12. 12
    ChangeTower▲149

    Get emailed when website content changes

    2018 · changetower.com · its alternatives →

13. 13
    Uptime Monitor▲76

    Get instant alerts when your website goes down.

    2023 · uptime-monitor.io · its alternatives →

14. 14
    Watcher37▲63

    Get notified when web pages change, encrypted.

    2023 · its alternatives →

15. 15
    Notify Me▲22

    Simple website update tracking and monitoring tool

    2024 · notify-me.rs · its alternatives →

16. 16
    Distill Web Monitor▲5

    Monitor websites, get notified when they change.

    2015 · distill.io · its alternatives →

17. 17SS
    Sleeping Spider – Web page change monitor▲31

    2014 · sleepingspider.com · its alternatives →

18. 18
    Tracker AI▲9

    Track website changes automatically | All-for-1 notification

    2025 · its alternatives →

19. 19
    WebCheck▲65

    Get notified whenever some of your websites are down

    2020 · webcheck.vercel.app · its alternatives →

20. 20
    Checkify▲77

    Super minimal, simple and inexpensive 24/7 uptime monitoring

    2021 · its alternatives →

21. 21
    Web Change Monitor▲2

    Know when any webpage changes

    Apr 2026 · webchangemonitor.com · its alternatives →

22. 22
    AlertBits▲5

    Save time & costs with auto website change tracking & alerts

    2022 · alertbits.com · its alternatives →

23. 23CV
    Computer vision to track and notify website changes▲16

    2014 · obvious.io · its alternatives →

24. 24
    ChangeWatch▲6

    Website change alerts, made simple.

    Jan 2026 · changewatch.vercel.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 →