AI · alternatives · 2026

24 alternatives to AuthMetrik

Prevent unauthorised sharing of online accounts

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. AuthMetrik launched in 2018; newer entries below may have overtaken it.

1. 1
   Authgear ONCE▲82

   Own your auth without subscription

   2025 · authgear.com · its alternatives →

2. 2US
   Using stylometry to find HN users with alternate accounts▲676

   Author here. This site lets you put in a username and get the users with the most similar writing style to that user. It confirmed several users who I suspected were alts and after informally asking around has identified abandoned accounts of people I know from many years ago. I made this site mostly to show how easy this is and how it can erode online privacy. If some guy with a little bit of Python, and $8 to rent a decent dedicated server for a day can make this, imagine what a company with millions of dollars and a couple dozen PhD linguists could do. Here's Paul Graham:…

   2022 · stylometry.net · its alternatives →

3. 3
   AccessURL▲819

   Share access to accounts without sending a username/password

   2016 · accessurl.com · its alternatives →

4. 4
   Trueguard▲368

   Stop fake user signups

   2025 · trueguard.io · its alternatives →

5. 5
   Control Auth▲7

   Stop account sharing. boost revenue

   2025 · its alternatives →

6. 6
   Google Invisible reCAPTCHA▲427

   Protects your website from spam and abuse

   2017 · its alternatives →

7. 7GJ
   garlic.js - don't let your users lose their form data▲212

   2012 · guillaumepotier.github.com · its alternatives →

8. 8
   PreventShare▲3

   Get notified if someone is sharing logins to your SaaS tool.

   2018 · its alternatives →

9. 9
   ProfileShare▲88

   Securely share any account without sharing your password

   2023 · its alternatives →

10. 10
    Sabil▲92

    Account sharing prevention like Netflix without losing users

    2022 · its alternatives →

11. 11
    One Account▲176

    1 click sign-ups

    2021 · its alternatives →

12. 12
    Loginbait.com▲77

    Protect your privacy with honeypots and get notified

    2023 · its alternatives →

13. 13
    MonoCloud for Startups▲167

    One identity layer for your customers, APIs, and agents

    Jul 2026 · monocloud.com · its alternatives →

14. 14
    Notopass▲218

    Share your accounts without giving username/password

    2020 · its alternatives →

15. 15
    ShareAccount▲167

    Share your account without giving out your password

    2017 · its alternatives →

16. 16
    Account Sharer▲74

    Share your account without giving out your password

    2021 · its alternatives →

17. 17
    Rupt▲183

    First API to detect and monetize password sharing

    2023 · its alternatives →

18. 18
    1ty.me▲158

    Self destructing links for sharing sensitive information

    2018 · its alternatives →

19. 19
    Authentiq▲157

    Strong authentication, without the passwords

    2017 · its alternatives →

20. 20
    Masked Emails by 1Password▲164

    Protect your online privacy with unique email addresses

    2021 · its alternatives →

21. 21KA
    Keratin AuthN – Accounts and Auth Microservice in Go▲104

    2017 · keratin.tech · its alternatives →

22. 22AT
    API to track and control account sharing▲9

    2022 · sabil.io · its alternatives →

23. 23
    AuthSafe▲82

    Block fraud not legitimate customers

    2021 · its alternatives →

24. 24
    Ninja▲18

    Prevent your email address from being sold 🙈

    2018 · 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 →