Apps like Copiosus

Here are some great alternatives to Copiosus by verbosus.com :
Seecrypt Enterprise
Seecrypt Enterprise
★3.7
Letstalk IM
Letstalk IM
★3.8
SimpleX Chat
SimpleX Chat
★4.2
SOCIETY: Secure Social Network
SOCIETY: Secure Social Network
★3.8
Confide - secure messenger
Confide - secure messenger
★4.4
Messages
Messages
★4.0
CrazyChat - Online Chat Rooms!
CrazyChat - Online Chat Rooms!
★3.3
Voxer Walkie Talkie Messenger
Voxer Walkie Talkie Messenger
★3.3
StealthTalk: Private Messenger
StealthTalk: Private Messenger
★4.1
Messages: Private messaging
Messages: Private messaging
★4.1
Glacier Chat: Secure Messenger
Glacier Chat: Secure Messenger
★4.3
Threema Work. For Companies
Threema Work. For Companies
★3.6
Messages
Messages
★4.6
Chat-in Instant Messenger
Chat-in Instant Messenger
★4.0
SMS Messages: Secure & Private
SMS Messages: Secure & Private
★3.9
Messages App
Messages App
★3.7