Signal is unclaimed —
S
Signal
Speak Freely·signal.org
Signal is an end-to-end encrypted messaging app that lets users send text, voice messages, photos, videos, GIFs, and files, and make voice and video calls, all secured with the open source Signal Protocol. It supports group chats and encrypted stickers, and runs on the user's data connection to avoid SMS/MMS fees. Signal is developed by an independent nonprofit with no ads or trackers, and is free for everyone.
What it's for
Share text, voice messages, photos, videos, GIFs and filesMake voice and video callsSend encrypted stickers and create custom sticker packsGroup chats with family, friends, and coworkers
Features 16
- Custom sticker pack creation and sharing
- Double Ratchet encryption algorithm
- Encrypted stickers
- End-to-end encryption powered by the open source Signal Protocol
- Group chats
- ML-KEM Braid post-quantum continuous key agreement
- No ads or trackers
- Photo, video, GIF, and file sharing
- PQXDH post-quantum key agreement protocol
- Sesame algorithm for multi-device session management
- Text messaging
- Uses phone's data connection instead of SMS/MMS
- Video calls
- Voice calls
- Voice messages
- X3DH key agreement protocol
At a glance
free tieropen source
TypeMobile app
PlatformsAndroid, iOS, Windows, macOS, Linux
LanguagesAfrikaans, العربية, Azərbaycanca, Bahasa Indonesia, Bahasa Melayu, Български, বাংলা, Bosanski, Català, Česky, Dansk, Deutsch, ελληνικά, English, Español, Eesti, Euskera, فارسی, Filipino, Français, Gaeilge, Galego, ગુજરાતી, עִבְרִית, हिन्दी, Hrvatski, Italiano, ქართული, Қазақша, Кыргызча, ಕನ್ನಡ, ខ្មែរ, 한국어, Lietuviškai, Latviešu, Magyar, Македонски, മലയാളം, मराठी, မြန်မာ, 日本語, Norsk, Nederlands, Polski, Português (Brasil), Português (Portugal), ਪੰਜਾਬੀ, Română, Pусский, Slovenčina, Slovenščina, Shqip, Српски, Suomi, Svenska, Kiswahili, தமிழ், తెలుగు, Українська, اردو, ئۇيغۇرچە, ภาษาไทย, Tiếng Việt, Türkçe, 廣東話 (香港), 简体中文, 繁體中文
CompanySignal Technology Foundation
Resources
Pricing
Signal is described as 'Free for Everyone' — it is an independent nonprofit supported by grants and donations, not by charging users.