otrv4 VS end-to-end

Compare otrv4 vs end-to-end and see what are their differences.


Off-the-Record Messaging Protocol version 4. -This is a draft- This repository is a mirror of http://bugs.otr.im/otrv4/otrv4 (by otrv4)


End-To-End is a crypto library to encrypt, decrypt, digital sign, and verify signed messages (implementing OpenPGP) (by google)
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otrv4 end-to-end
5 8
185 4,096
0.5% 0.0%
0.0 0.0
4 months ago 4 months ago
- Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of otrv4. We have used some of these posts to build our list of alternatives and similar projects.

We haven't tracked posts mentioning otrv4 yet.
Tracking mentions began in Dec 2020.


Posts with mentions or reviews of end-to-end. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-06-13.
  • A few questions for the dev…
    3 projects | reddit.com/r/Cryptee | 13 Jun 2022
    In contrast, companies like Standard Notes actually uses their own home-built encryption library, which is why it's a bit more critical that they go through these audits more often and quickly than others. And despite the audits, this home-brewed encryption library puts them at a much bigger risk, due to the fact that it's never going to be as thoroughly battle tested as an open industry-standard encryption like OpenPGP, used by much larger companies like Google, Protonmail, etc.
  • End-to-end encryption messaging implementation
    3 projects | reddit.com/r/ComputerSecurity | 5 Nov 2021
    https://github.com/google/end-to-end ?
  • How to do E2EE in the Browser correctly if even possible?
    2 projects | reddit.com/r/crypto | 23 Aug 2021
    When Google was looking at implementing E2E mail via a browser plugin, it gave up in part because of the difficulties of doing it right. They published the library and documentation, but the more valuable part was the threat model. In it they examine the assets to protect, threat sources both inside and outside the threat model, UI threats, message threats, key-related threats, cryptographic threats, and other threats. It's an excellent walk-through of just how difficult it is to do general encryption right, and why doing it in the browser is so hard.
  • Browser extension that makes any web app E2E encrypted?
    5 projects | reddit.com/r/privacy | 28 Feb 2021
    Google E2E Library — Unsure how up-to-date this ... limited GitHub activity.

What are some alternatives?

When comparing otrv4 and end-to-end you can also consider the following projects:

freedom-pgp-e2e - Wrapping up end-to-end code and provide in freedom custom API.

openpgpjs - OpenPGP implementation for JavaScript

PGP-Anywhere - Chrome browser extension to de- & encrypt PGP in your browser

HiddenVM - HiddenVM — Use any desktop OS without leaving a trace.

Xabber - Open-source XMPP client for Android

2key-ratchet - 2key-ratchet is an implementation of a Double Ratchet protocol and X3DH in TypeScript utilizing WebCrypto.

2Password - 2Password: A cryptography experiment

ChatSecure-iOS - ChatSecure is a free and open source encrypted chat client for iOS that supports OTR and OMEMO encryption over XMPP.