The best alternatives to Text in Code are Telegram Messenger, Tresorit, and Mumu. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Text in Code?
AssemblyAI— Speech-to-Text API with superhuman accuracy
Tresorit is an online cloud storage service based in Switzerland and Hungary that emphasizes enhanced security and data encryption for Businesses and individuals/freelancers. ... Tresorit has been likened to a high-security alternative to Dropbox.
Natural Text is an encryption app which with a new algorithm converts the encrypted text to natural text. So, it would be very hard for the adversary to understand that the message is encrypted. Th app is available for many languages including English, Spanish and Chinese.