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Alternatives

Products that do what Opentestudox does

Private messaging with local encryption

  1. 1

    Decentralized anonymous blockchain messenger. Crypto In-Chat

    2020

  2. 2

    In-browser encrypted chat (open source)

    2014

  3. 3AE

    This is a project I made to learn more about crypto. I've also written a [post](https://vaktibabat.github.io/posts/ecurvechat/) that explains all the crypto concepts and algorithms used in the project, and how I implemented them. I'd be very glad for any feedback about both the code and the post :)

    2024 · github.com

  4. 4
    Secret173

    Send a message through a safe, private, and encrypted link

    2017

  5. 5

    Private, end-to-end encrypted, open-source mail

    2022

  6. 6LP

    OP here. I built this because I recently caught myself almost pasting a block of logs containing AWS keys into Claude. The Problem: I need the reasoning capabilities of cloud models (GPT/Claude/Gemini), but I can't trust myself not to accidentally leak PII or secrets. The Solution: A Chrome extension that acts as a local middleware. It intercepts the prompt and runs a local BERT model (via a Python FastAPI backend) to scrub names, emails, and keys before the request leaves the browser. A few notes up front (to set expectations clearly): Everything runs 100% locally. Regex detection…

    Dec 2025 · github.com

  7. 7

    Secure Anonymous SMS in the cloud (and a phone number)

    2018

  8. 8OD
  9. 9DI
  10. 10

    Secure your passwords with an, open-source password manager

    2024

  11. 11
    Vuash105

    Send secret messages safely.

    2016

  12. 12
    MagicPad110

    Free and open-source encryption suite

    2019

  13. 13IC

    2024 · webcrypto-private-messages.vercel.app

  14. 14

    Anonymous messaging, chat in incognito mode, encryption

    2023

  15. 15CI
  16. 16

    Earn Ether from your supporters on any platform & keep 100%

    2018

  17. 17

    Text friends without Google or Facebook snooping

    2018

  18. 18

    Client-side encrypted chat with asymmetric encryption

    2019

  19. 19
    CallBox88

    Anonymous P2P messenger on blockchain technology

    2017

  20. 20ET

    So, you want to avoid mass surveillance and don't trust big tech companies either? But you're tied to your existing network of contacts like everyone else? Well now you can send encrypted messages to your contacts over the Twitter direct messaging channel. It's a serverless SPA called Seecret, a Twitter client hosted at https://www.seecret.io Seecret is open source and freely distributable. You can host it anywhere even from your own localhost server. The app is just plain html and javascript, with no server-side processing at all, no tracking, no logging. Steps: 1-Grant Seecret.io…

    2016

  21. 21
    Ring83

    A free software for distributed and secured communication

    2015

  22. 22

    Prove that you said things before anyone else

    Jun 2026 · yousaidthat.org

  23. 23

    Privacy focused chat that doesn't store your messages

    2019

  24. 24

    Chat for small teams — encrypted and decentralized

    2019

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