Based on our record, Autocrypt seems to be more popular. It has been mentiond 6 times since March 2021. We are tracking product recommendations and mentions on Reddit, HackerNews and some other platforms. They can help you identify which product is more popular and what people think of it.
If you want encrypted instant messaging, I'd recommend the Matrix ecosystem, using the Element apps. For an email-based protocol, I would suggest Delta Chat, which is backwards compatible with existing email accounts, and follows the Autocrypt approach to PGP.  https://element.io/  https://delta.chat/en/  https://autocrypt.org/. - Source: Hacker News / 24 days ago
> you have to use it in your existing email client, and then you have to download keys, and then there’s this whole third issue of making sure they’re the right keys. If you use Thunderbird as your email client, then it will download the right keys for you automatically. Actually it's two clicks to use the WKD support to download the key (assuming your correspondent's email provider supports that, as ProtonMail... - Source: Hacker News / 24 days ago
> a new protocol that can degrade gracefully Does Autocrypt meet that definition? https://autocrypt.org/ Sadly, for the last 3 years, ProtonMail has resisted implementing it (unlike Posteo, for example), using FUD tactics to justify themselves: https://github.com/ProtonMail/WebClient/issues/120. - Source: Hacker News / 2 months ago
If we're sharing obligatory links, then a detailed critique of "The PGP Problem" is: https://articles.59.ca/doku.php?id=pgpfan:tpp It's true, though, that much work is needed to bring PGP up to the levels expected of modern crypto tools. Hopefully some of that will happen as a result of the work happening in the IETF: https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-03.html and due to technology... - Source: Hacker News / 4 months ago
I think Autocrypt is meant to help address this issue, but not 100% sure. Someone, please correct me if this is wrong. - Source: Reddit / 5 months ago
GnuPG - GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).
PGP Tool - PGPTool allows you to encrypt and decrypt files. It's free and easy to use.
GPG Suite - Use GPG Suite to encrypt, decrypt, sign and verify files or messages.
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.
Encrypto - Encrypto lets you encrypt files before sending them to friends or coworkers.
AES Crypt - AES Crypt is an advanced file encryption utility that integrates with the Windows shell or runs from the Linux command prompt to provide a simple, yet powerful, tool for encrypting files using the Advanced Encryption Standard (AES).