License
GPLv2Supported platforms
Linux,, OSX, Android, iOS, SailfishOSBrowser integration
Chrome, Firefox, QutebrowserEncryption methods
GnuPGMultifactor
-Platforms
-End-to-end encryption
-License
ISCSupported platforms
Linux, macOSBrowser integration
NoEncryption methods
N/AMultifactor
YesPlatforms
-End-to-end encryption
-License
-Supported platforms
-Browser integration
-Encryption methods
-Multifactor
-Platforms
Cross PlatformEnd-to-end encryption
Http2 TLS 1.3 end to end encryption