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Open source alternative to Threema Work, Wire and Element (Element Matrix Services)
It is a free, open-source, and encrypted peer-to-peer instant messaging protocol, prioritizing user privacy and security.

Use Tox when users want encrypted communication without depending on a central messaging provider.
Your community needs polished workspace administration and easy invite-based onboarding.
Use Toxcore as a foundation for experiments or apps around peer-to-peer private communication.
You need a hosted messaging API with SLAs and support.
Tox is built around direct peer-to-peer communication rather than a central chat server controlling every conversation.
The protocol and core library target encrypted messaging, voice, video, and file transfer use cases.
Toxcore provides the lower-level foundation that client applications can build on for private communication experiences.
Tox is a protocol and core library with client applications built around it.
Tox is designed for peer-to-peer communication rather than a central provider-owned chat server.
Peer-to-peer serverless chat app with no central server
Secure team chat built on the Matrix open protocol
Peer-to-peer encrypted chat over Bluetooth mesh network
Empower AI agents with agent-native CLIs
Fast and censorship-resistant proxy solution
Your AI research assistant, fully local and encrypted.
Centralized messengers require users to trust one provider with account identity, metadata, availability, and policy decisions. That can be a poor fit for privacy-focused communities or developers building communication tools.
Peer-to-peer messaging changes the trust model, but it also changes reliability, discovery, and usability expectations. Users need to understand that privacy and decentralization come with practical tradeoffs.
Tox is best for privacy-focused users and developers who value peer-to-peer encrypted communication over hosted workspace features.