Apps like Briar Mailbox

Here are some great alternatives to Briar Mailbox by Briar Project :
Chiffry Secure Messenger
Chiffry Secure Messenger
★4.3
mail.co.uk Mail
mail.co.uk Mail
★4.4
Tuta: Secure & Private Mail
Tuta: Secure & Private Mail
★4.6
Free Mailer - Mail Client
Free Mailer - Mail Client
★3.6
Yandex Mail
Yandex Mail
★4.5
Criptoo
Criptoo
★3.4
KT Messenger (KalamTime)
KT Messenger (KalamTime)
★4.1
Privacy Keyboard : Secure text
Privacy Keyboard : Secure text
★4.6
TransMessenger
TransMessenger
★4.1
Voxer Walkie Talkie Messenger
Voxer Walkie Talkie Messenger
★3.3
Conversations (Jabber / XMPP)
Conversations (Jabber / XMPP)
★4.2
Pryvate Messenger
Pryvate Messenger
★3.6
Link'D
Link'D
★3.4
AI Chat - Call&Chat
AI Chat - Call&Chat
★4.4
Call.Me
Call.Me
★3.5
Inbox Private Messenger
Inbox Private Messenger
★3.9