The best open source alternative to Skype is Signal. If that doesn't suit you, our users have ranked more than 100 alternatives to Skype and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Skype are Tox, Element, Wire and Jami.
Encrypted video meetings with unlimited participants, screen sharing, recording with secure storage, no data sale or registration, chat, reactions, calendar and background features, hosted entirely in Switzerland on renewable energy and compliant with strict privacy laws.
An alternative Telegram client based on TDLib, with higher speed, slicker animations and experimental features.
Feature-rich XMPP client for advanced users offering strong customization options, secure encrypted messaging (TLS, OpenPGP, OTR, OMEMO), file transfers, audio/video calls, support for animated emoticons, modern themes, group messaging, and multi-platform compatibility.
Self-hosted communication platform with secure audio, video, chat, web conferencing, screensharing, advanced encryption, and metadata privacy, running on user-controlled servers, supporting web and mobile apps, and eliminating third-party data exposure.
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)
Pure instant messaging — simple, fast, secure, and synced across all your devices. One of the top 5 most downloaded apps in the world with over 1 billion active users.
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...
Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell it about your accounts on all those services and do all your chatting within one application.
Chitchatter is a free (as in both price and freedom) communication tool. Designed to be the simplest way to connect with others privately and securely, it is:
Speek! is the first messenger that is anonymous and censorship-resistant by design. Speek! messenger encrypts all messages and is secure, private and decentralized.
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Enpathy is just a client sofware, not a service like Skype.