2 Best Open Source WhatsApp Alternatives
A curated collection of the 2 best open source and self-hosted alternatives to WhatsApp in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for WhatsApp in 2026? The top open-source alternative is Signal — Privacy-first encrypted messaging app.
Other highly rated open-source WhatsApp alternatives include Twake Chat.
Privacy-first encrypted messaging app
Signal is a privacy-focused messaging app that prioritizes secure communication without compromising usability. Built on open-source principles, Signal offers state-of-the-art end-to-end encryption for all messages, calls, and media, ensuring only you and your intended recipients can access your conversations. - End-to-End Encryption: All messages, calls, and media are encrypted by default using the open-source Signal Protocol. - Free Messaging & Calls: Send texts, voice messages, photos, videos, and files without SMS fees. Make crystal-clear voice and video calls globally at no cost. - Group Chats: Create encrypted group conversations for family, friends, or coworkers. - Stickers & Expressions: Add encrypted stickers or create custom sticker packs to personalize chats. - No Ads or Trackers: Signal is ad-free and does not collect user data for tracking or monetization. - Nonprofit & Independent: Operated by a 501c3 nonprofit, free from corporate influence or acquisition. - Cross-Platform: Available on Android, iOS, Windows, Mac, and Linux. - Open Source: Transparent development with public repositories for security audits. Signal operates as a centralized service with client-side encryption. While the core infrastructure is not self-hostable, the open-source Signal Protocol can be integrated into other applications. Clients are available for all major platforms, and the service is supported by donations and grants.
Secure open-source messenger for professionals
Twake Chat is a secure and private-by-default messenger designed for professional communication. Built on the decentralized Matrix protocol, it ensures high levels of security and privacy while offering features like end-to-end encryption, multi-account support, and cross-device synchronization. - End-to-End Encryption (E2EE): Secure conversations with customizable security levels. - Multi-Account Support: Switch between personal and work accounts seamlessly. - Cross-Platform Sync: Synchronize messages and data across all devices (mobile, tablet, laptop). - Matrix Protocol Integration: Communicate across platforms like Telegram, Discord, and Signal via bridges. - Jitsi Integration: Built-in videoconferencing for improved collaboration. - Corporate Directory (SSO): Facilitate communication with contacts from phone books and corporate directories. - On-Premises Deployment: Host Twake Chat on your own infrastructure for enhanced security and performance. - User-Friendly Interface: Simple registration, usage, and maintenance with strong community support. Twake Chat is powered by the Matrix protocol and can be deployed on-premises or in the cloud. The open-source server (ToM-server) is available on GitHub, and the project offers technical documentation for self-hosting. Mobile apps are available for both Android and iOS.
About WhatsApp
A free messaging app that lets you send text, voice, and video messages to other WhatsApp users.