FlowCrypt aims to become fully compatible with all OpenPGP compliant email software out there.
Please let us know if you encounter any issues so that we can promptly fix them.
Interoperability with other software
White spaces mean we have not tested this or did not hear from any user who tested it.
✓ and ✕ means we tested it or heard from a user who has.
|Enigmail||ProtonMail||GPG Suite||Symantec Encryption Des.||gpg4o||AirMail||Encryptomatic||eM||gpg4win / GpgOL||k-9||Mailvelope||Open Keychain||p≡p (pEp)|
|Import Private Key from||✓||n/a||✓||✓||✓||✓||✓|
|Import Public Key from||✓||✓||✓||✓||✓||✓||✓||✓||✓||✓||✓||✓|
|Read messages by||✓||✓||✓||✓||✓||✓||✓||✓||✓||✓||✓||✓||✓|
|Send messages to||✓||✓||✓||✓||✓||✕||✓||✕||✓||✓||✓||✓||✕|
|Send attachment to||✓||✓||✓||✓||✓||✓||✓||✓||✓|
|Receive attachment from||✓||✓||✓||✓||✓||✓||✓||✓||✓|
*Unicode compatibility between Enigmail and FlowCrypt is well tested, but we have heard of one instance where our Android app was not able to read Japanese text produced by Enigmail, that we were not able to properly investigate. If you experience any issues, please read compatibility issue - incoming email and see if you can get us a sample.
Please help us complete the table above if you have tested any combinations that we haven’t. You can use the
Contribute button, or email us at
|FlowCrypt Browser Ext.||FlowCrypt Android App|
|Attachments||✓||●||Android attachments limited to 3MB while in Beta|
|Import Private Key||✓||✓|
|Import Public Key||✓||✓|
|Sign a message||✓||✕|
|Sign encrypted message||✕||✕||issue tracker|
|Send pgp/mime||✕||✕||issue tracker|
|2048bit, 4096bit RSA||✓||✓|
|Use of public keys without a self signature||✕||✕||issue tracker|
|Decrypt messages without MDC||●||●||Only manually, after a warning|
Our software is uses on OpenPGP.js on all platforms.