Autocrypt
GnuPG
GPG Suite
CrococryptFile
Chatlink.com
File Encryption XP
Delta Chat
S.S.E. File Encryptor
Message Peeping Tom
Easy Message
Cellcrypt
Seecrypt
Signal
YAATA
WhatsRemoved+
WAMR
AutocryptBased on our record, Autocrypt seems to be more popular. It has been mentiond 13 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Also, isn't downloading and using DeltaChat would be easier? It used autocrypt protocol out of the box as well bunch of useful features and feels more like comfortable messenger than email. Source: about 1 year ago
You should look into the autocrypt standard and apps that can use it. Https://autocrypt.org/ Https://en.wikipedia.org/wiki/Autocrypt. Source: over 1 year ago
They can also use new headers then parse those, that is what Autocrypt does, See https://autocrypt.org/ . The email specification allows custom headers for extension. Source: over 1 year ago
Requirement 1: It should be backwards compatible with existing email systems. As examples, consider Delta Chat and the Autocrypt specification it's built on. https://delta.chat/en/ https://autocrypt.org/. - Source: Hacker News / about 2 years ago
That's why I said https://delta.chat/en/ ;) An email-based messenger with https://autocrypt.org/. Source: over 2 years ago
GnuPG - GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).
Easy Message - Easy Message app comes up with features to help users in effortlessly sending text messages to a phone number, which is not in the contact list.
GPG Suite - Use GPG Suite to encrypt, decrypt, sign and verify files or messages.
Cellcrypt - Cellcrypt app provides features so you can enjoy secure conference calling, messaging, and sharing of documents.
CrococryptFile - Strong file encryption tool
Seecrypt - Seecrypt app allows users to do secure voice and conference calls by using advanced encryption features so they can contact their friends, colleagues, and family members without any privacy issues.