AI · alternatives · 2026

24 alternatives to Javascript Constable

Stop data skimming w/ network activity change detection 🕵️

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

1. 1
   Guardscript – Detect any changes made to your JavaScript files▲28

   Guardscript monitors every few minutes any changes made to your Javascript files and sends you a notification with the changes made. You can then detect any malicious modification by analyzing these results.

   2019 · guardscript.com · its alternatives →

2. 2
   ScrapX▲356

   Stay ahead of your competitors - Our service tracks the websites you select on a daily basis and notifies you of any changes, whether it's a new headline or a new product that's been released.

   2023 · scrapx.io · its alternatives →

3. 3
   Kuoll JavaScript Tracer▲205

   See how your users crashed your web application

   2016 · kuoll.com · its alternatives →

4. 4
   A Chrome extension that tracks front-end JavaScript at runtime▲95

   A chrome extension tracks front-end JavaScript that uses DOM / jQuery APIs to manipulate html dom elements (e.g., change style, attach event listener) at runtime. - pilagod/js-tracker

   2018 · github.com · its alternatives →

5. 5
   HookWatch▲112

   Automated webhook monitoring for indie hackers & small teams

   Feb 2026 · hookwatch.dev · its alternatives →

6. 6
   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 →

7. 7SU
   Speed up your site by running JavaScript when the browser is idle▲94

   2022 · npmjs.com · its alternatives →

8. 8
   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 →

9. 9
   Bugbot by Kuoll▲204

   Instantly see user actions that lead up to a bug, in Slack

   2017 · kuoll.com · its alternatives →

10. 10
    SentinelJS – Detect new DOM nodes using CSS selectors▲90

    Detect new DOM nodes using CSS selectors (650 bytes) - amorey/sentineljs

    2017 · github.com · its alternatives →

11. 11
    Hexowatch▲138

    Your AI sidekick to monitor any page for changes

    2020 · hexowatch.com · its alternatives →

12. 12
    Trailbot▲86

    Monitor your files and react upon unwanted modification

    2016 · its alternatives →

13. 13PM
    Proxino -- Monitor and Debug your JavaScript▲105

    2012 · proxino.com · its alternatives →

14. 14SA
    Stop asking your clients "What browser are you on?"▲93

    2013 · browser-details.com · its alternatives →

15. 15
    Socket – Secure your JavaScript supply chain▲133

    Excited to share the project I've been working on for the past 7 months! We've seen nearly weekly attacks against the open source software supply chain. I saw the seeds of this trend start in the mid 2015s as an open source maintainer and I've watched it only get worse over the years. I finally decided to try to solve this problem. Socket is taking an entirely new approach to one of the hardest problems in security in a stagnant part of the industry that has historically been obsessed with just reporting on known vulnerabilities. Unlike other scanning tools, Socket actually analyzes the…

    2022 · socket.dev · its alternatives →

16. 16
    TrackJS JavaScript Error Monitoring▲119

    Discover the bugs in your web applications and fix them fast

    2014 · trackjs.com · its alternatives →

17. 17
    An experimental data-flow analysis tool for JavaScript▲95

    Find the origin of any character in the DOM

    2019 · fromjs.com · its alternatives →

18. 18
    Haark▲72

    Monitors your sites and notifies you if they're down

    2021 · its alternatives →

19. 19
    Trailbot – Monitor Your Data and Act Upon Unwanted Modifications▲18

    Trailbot tracks files and logs in your servers and triggers Smart Policies upon unwanted modification. - trailbot/client

    2016 · github.com · its alternatives →

20. 20
    JavaScript port of Scientist library for refactoring critical paths▲34

    :microscope: A JavaScript interpretation of the Ruby library Scientist, a library for carefully refactoring critical paths. - bugthesystem/scientist.js

    2016 · github.com · its alternatives →

21. 21SO
    ScriptObservatory.org – How much malicious JavaScript goes unnoticed?▲38

    2015 · scriptobservatory.org · its alternatives →

22. 22
    AlertBot▲6

    The Leader in Web Transaction Monitoring

    2021 · alertbot.com · its alternatives →

23. 23
    Jscrambler▲8

    JavaScript Protection and Webpage Monitoring

    2019 · jscrambler.com · its alternatives →

24. 24
    Detect▲12

    A chrome extension to track any change on a website

    2017 · getdetect.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 →