Apps similar to Threema include Signal, which is free and open source. Other options are Telegram, Element, Tox and SimpleX Chat. Instant Messengers like Threema are a crowded field, with more than 100 alternatives for Android, iPhone, Windows, Mac and Linux.
It is the brand new, and fastest ever, Matrix client. It is for personal and community use, and will support enterprise functionality later this year.
United Kingdom
Encrypted messenger supporting multi-platform access, unlimited group and private chats, file and voice message sharing, decentralized operation, open-source code, custom themes including dark mode, advanced moderation, push notifications, and no advertisements.
Switzerland
Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG].
Germany
EU
ArcaneChat is a Delta Chat client and was created with a focus on usability, good user experience, and saving data plan. Also the app usually experiments with new features that eventually might get added to the official Delta Chat client.
GermanyEU
Peer-to-peer group chatting over Tor and IPFS, with local-first encrypted messaging and no central servers, offers privacy-focused decentralized collaboration for teams, supporting desktop and mobile. FOSS, open to contributors, and avoids surveillance-based tracking.
United States
Berty is a secure peer-to-peer messaging app that works with or without internet access, cellular data or trust in the network. Berty is a privacy-first messaging application built on top of the Berty Protocol.
FranceEU
Buzz is a self-hostable workspace where humans and AI agents share the same rooms.
United States
Decentralized messenger featuring end-to-end encryption for individual and group chats, no registration needed, no tracking or metadata logs, IP address protection, secure attachment sharing, multi-device sync, dark mode, open-source code, and ad-free use.
Switzerland
Cwtch - (a Welsh word roughly translating to “a hug that creates a safe place”) is a decentralized, privacy-preserving, multi-party messaging protocol that can be used to build metadata resistant applications.
Canada
Status combines a private messenger, secure crypto wallet, and Ethereum Web3 DApp browser into one powerful communication tool. Chat with friends and growing communities. Buy, sell, store, and exchange digital assets.
GermanyEU
Secure communication for individuals, teams, and large organizations.
United States
FranceEU
