Life & fun · alternatives · 2026

URL Canary alerts users when their secrets or sensitive information shared online are discovered. Launched in 2018, the tool monitors the web for specified URLs or data, notifying users if those items appear in search… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. URL Canary – Get an alert when someone finds your secrets launched in 2018; newer entries below may have overtaken it.

1. 1
   UpdateCanary.com▲100

   When a search engine updates, we send an SMS alert

   2023 · updatecanary.com · its alternatives →

2. 2
   RevealURL▲206

   No more clicking unknown short-URLs

   2019 · revealurl.xyz · its alternatives →

3. 3
   URL Canary▲15

   URL Canary tells you when your secrets get stolen online

   2018 · its alternatives →

4. 4
   Canary▲68

   Warn Slack teams against nsfw messages using AI

   2019 · its alternatives →

5. 5
   Canary Tokens▲67

   Deploy tiny traps to detect hackers and breaches

   2015 · canarytokens.org · its alternatives →

6. 6
   We got tired of asking 'What browser are you using?' and created this▲521

   Instantly detect your browser, operating system, screen resolution, and more. Get a shareable link with your browser details for support agents.

   2012 · aboutmybrowser.com · its alternatives →

7. 7
   What every browser knows about you▲553

   This is a demonstration of all the data your browser knows about you. All this data can be accessed by any website without asking you for any permission.

   2016 · webkay.robinlinus.com · its alternatives →

8. 8
   Beacon▲75

   Monitor your websites' Lighthouse scores and get alerts

   2023 · its alternatives →

9. 9
   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 →

10. 10BE
    Browser extension that spoofs your location data to match your VPN▲313

    2022 · its alternatives →

11. 11
    Suspicious Site Reporter▲74

    Report suspicious sites to Google

    2019 · chromewebstore.google.com · its alternatives →

12. 12
    ThreatSlayer▲85

    Free enterprise grade security for your personal browser

    2023 · chromewebstore.google.com · its alternatives →

13. 13
    Creep Alert▲131

    Check if friends or colleagues track you via email

    2019 · its alternatives →

14. 14
    Pingkat▲72

    Continuously monitor your website's public resources

    2023 · its alternatives →

15. 15
    Let Me Know When▲120

    AI-Powered website URL monitoring

    2024 · letmeknowwhen.app · its alternatives →

16. 16
    WebARX▲147

    Protect websites from plugin vulnerabilities

    2019 · patchstack.com · its alternatives →

17. 17CI
    Check if your browser is vulnerable to the Apple SSL bug▲118

    2014 · gotofail.com · its alternatives →

18. 18
    Loginbait.com▲77

    Protect your privacy with honeypots and get notified

    2023 · its alternatives →

19. 19
    Beacon – a new open-source privacy and security-focused browser▲47

    Beacon is a privacy and security-focused browser with native DANE support and a decentralized p2p light client.

    2021 · impervious.com · its alternatives →

20. 20
    + Link▲72

    A URL Shortener that helps combat phishing

    2018 · plus.link · its alternatives →

21. 21
    Unshort.link▲70

    Prevent short link services from tracking you 👀

    2020 · unshort.link · its alternatives →

22. 22PY
    Protect your links with a password▲32

    Keep your links safe and accessible only to authorized users

    2024 · protectmylink.xyz · its alternatives →

23. 23
    SafeToOpen▲81

    Anti-phishing extension that alerts you of dangerous sites

    2021 · chromewebstore.google.com · its alternatives →

24. 24
    Checkify▲77

    Super minimal, simple and inexpensive 24/7 uptime monitoring

    2021 · 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 →