LINE is a popular messaging app offering chat, voice/video calls, stickers, and a timeline. Below is a curated list of 20 free instant‑messaging platforms that provide comparable or complementary features, ranging from mainstream consumer apps to open‑source collaboration tools.
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Widely used mobile messenger with end‑to‑end encrypted text, voice, video calls and group chats. Supports media sharing and status updates.
Cloud‑based messenger with fast, secure chats, large group support (up to 200k members), bots, channels, and self‑destructing messages.
Open‑source, privacy‑focused app offering end‑to‑end encrypted text, voice, video calls and disappearing messages.
Free messaging and VoIP app with encrypted chats, stickers, group calls, and a public chat community platform.
Community‑oriented platform with text, voice, and video channels, screen sharing, and robust moderation tools (free tier).
Team collaboration hub offering channel‑based messaging, file sharing, and integrations; free plan includes 10k recent messages.
Free version of Teams provides chat, video meetings, file collaboration, and integration with Office online.
All‑in‑one Chinese messenger with text, voice/video calls, Moments (social feed), and mini‑programs.
South‑Korean messenger featuring free texting, voice/video calls, emoticons, and integrated games.
Simple group‑chat app that works across iOS, Android, and web; supports media sharing and polls.
Integrated with Facebook, offers text, voice/video calls, stickers, and chat bots; works on mobile and web.
Free chat service for personal Google accounts; supports direct messages, rooms, and integration with Google Workspace.
Open‑source client for the Matrix protocol; provides encrypted group chats, voice/video calls, and bridges to other services.
Self‑hosted open‑source chat platform with real‑time messaging, video conferencing, and extensive customization.
Open‑source Slack alternative offering channel‑based messaging, file sharing, and optional self‑hosting.
Threaded open‑source chat app that combines real‑time and asynchronous messaging for organized discussions.
Decentralized, peer‑to‑peer messenger with end‑to‑end encryption, voice/video calls, and no central server.
Free, open‑source, peer‑to‑peer instant messenger with encrypted text, voice, and video chat.
Secure collaboration platform offering encrypted messaging, voice/video calls, and file sharing for personal use.
Classic messenger revived with modern features: free text, voice/video calls, stickers, and bot integration.