Signal
A secure messenger with end-to-end encryption, voice/video calls, and group chats. No ads, no trackers, and completely free.
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.
Key Features
- 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.
Tech / Self-Hosting
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.