Olvid is a messaging service from France which is useable without a phone number and accessible under Android and iOS (which allows running it on a tablet without a SIM-Card). It provides an end-to-end encryption which includes metadata and thereby can assure anonymity of its users.

Threema Private is an instant messaging app for individuals from Switzerland, available for iOS, Android, Windows, macOS and Linux, and downloadable from the App Store and Google Play. Messages are end-to-end encrypted, and the mobile and desktop client apps are published under the AGPL-3.0 open-source license, while the server software that relays and stores messages remains proprietary. Because encryption and decryption take place only on users' own devices, the server cannot read message content, which limits how much the proprietary server code affects the confidentiality of communication. Threema Private is the individual-user product from Threema AG, distinct from Threema Work, the company's separate offering for businesses and organizations.