Enigma is a FREE instant messaging application based on end-to-end encryption.
Free: Enigma uses your phone's Internet connection to let you message friends and family, so you don’t have to pay for every message. (Data charge may apply. Contact your provider for details)
Multi-device support: Synchronize your messages on up to 5 devices, so you can use multiple phones and computers at the same time.
Unlimited: You can send an unlimited amount of messages, photos, videos and files of any type (.zip, .pdf, .doc, etc.).
Secure: Message content uses end-to-end encryption by default, even our developers can't decrypt your messages. Pictures, audio, video, and files sent in chat will be encrypted using symmetric AES.
Privacy: After becoming the contact and phone number will not appear, you can also prevent others find you by phone number in your privacy settings.