Apps like Tessercube

Here are some great alternatives to Tessercube by Dimension HQ :
OpenKeychain: Easy PGP
OpenKeychain: Easy PGP
★4.1
Conversations (Jabber / XMPP)
Conversations (Jabber / XMPP)
★4.3
aTalk (Jabber / XMPP)
aTalk (Jabber / XMPP)
★4.1
Hide Messages - Private SMS
Hide Messages - Private SMS
★4.4
Cryptool
Cryptool
★4.3
ArmorText
ArmorText
★4.4
Messenger - SMS Short Messages
Messenger - SMS Short Messages
★4.3
Handcent Next SMS messenger
Handcent Next SMS messenger
★4.5
Miggi
Miggi
★3.8
Amharic Keyboard
Amharic Keyboard
★3.7
BIG SMS for Seniors
BIG SMS for Seniors
★4.2
Nicegram: AI Chat for Telegram
Nicegram: AI Chat for Telegram
★4.5
Messages - Text sms & mms
Messages - Text sms & mms
★3.9
Bruno the Jabber Bear (XMPP)
Bruno the Jabber Bear (XMPP)
★4.0
Receive SMS Plus
Receive SMS Plus
★4.3
Diamond SMS Texting App
Diamond SMS Texting App
★3.5