The best open source alternative to TeamSpeak is Mumble. If that doesn't suit you, our users have ranked more than 50 alternatives to TeamSpeak and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to TeamSpeak are Element, Jami, Jitsi Desktop and Element X.
Free, open source voice chat featuring low-latency, high quality audio, secure encrypted communication, self-hosting options, in-game overlays, positional audio, scripting support, low resource usage, and robust user permission controls for gaming and collaboration.
Provides secure collaboration with end-to-end encryption, supporting chat, voice, and video calls. Available on all major platforms, it enables digital sovereignty with a decentralized design and interoperability through bridges to systems like Slack and Teams. Includes enterprise-grade SaaS.
Open source decentralized communication platform supporting secure end-to-end encrypted calls, messaging, group conferencing, file and media sharing, SIP compatibility, multi-device sync, and strong privacy, available across desktop and mobile systems.
Jitsi Desktop (previously SIP Communicator) is a legacy audio/video and chat communicator with full encryption, precedessor of Jitsi Meet .
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.
Powered by WebRTC, Real-time video call, chat room and screen sharing entirely browser based.
Open-source chat platform providing community-focused group messaging, video calls, profile customization with animated avatars, custom emojis, tags, post creation, discovery of communities, and full source code access on GitHub. Entirely donation-funded.
![Profile Interface [PC - 2025]](https://img.alternativeto.net/s/618x394/avif/nerimity_993222_full.png)
![Messages View [PC - 2025]](https://img.alternativeto.net/s/618x394/avif/nerimity_281418_full.png)
![Server Discovery [PC - 2025]](https://img.alternativeto.net/s/618x394/avif/nerimity_282508_full.png)
![Server Settings [PC - 2025]](https://img.alternativeto.net/s/618x394/avif/nerimity_628028_full.png)
Open source group chat, voice, and video platform with self-hostable private servers, Discord compatibility, extensible plugin and theme system, end-to-end encryption, support for multiple instances, and community-driven development offering high flexibility.
Decentralized social and blog platform based on XMPP, enabling self-hosting, cross-network chat, video calls, and group collaboration. Users control and migrate their data, communicate across various networks, and access services from any node while preserving privacy and open-source principles.
The preservation of privacy is the main driver for this project. Secure technologies, such as WebRTC, are used to establish a direct connection between the participants. The website that provides the web application and mediates the communication stores as little data as...
The best Discord alternative. Mezon is a Live, Work, and Play platform. It’s perfect for gaming and chilling with friends, or even building a global community. Customize your own space to talk, play, and hang out.
An ad-free, theme-able, chatting platform built for privacy and security while offering a huge feature set including bot support, moderation, voice calls, screen sharing, video, embeds and many other features, it's built to be reliable and self-hosted while still allowing...
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Open source alternative, that has the same level or better of voice quality.