Telegram is a popular messaging app that also offers voice and video calls. Below is a curated list of free VoIP (Voice over IP) solutions that can be used as alternatives for voice communication, group calls, and conferencing.
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Free voice channels and direct calls for gamers and communities, with low‑latency audio.
Free version includes unlimited chat and voice/video calls for up to 100 participants.
Open‑source video‑conferencing platform that also supports high‑quality VoIP calls without registration.
Low‑latency, open‑source voice chat primarily used by gamers; self‑hosted or via public servers.
Decentralized messenger with secure VoIP and video calls built on the Matrix protocol.
Secure collaboration suite with free voice and video calls for up to 5 participants per room.
Peer‑to‑peer, encrypted instant messaging and voice/video calling without central servers.
Open‑source SIP client for Android, iOS, macOS, Windows, and Linux with free VoIP calling.
Cross‑platform SIP softphone offering free voice calls through any SIP provider.
Self‑hosted chat platform that can be extended with free VoIP plugins for voice calls.
Free conference calling service offering unlimited voice minutes and dial‑in numbers.
Google’s free video‑meeting platform that also supports high‑quality voice‑only calls.
Popular video‑conferencing tool that allows voice‑only meetings up to 40 minutes for free.
Telegram’s experimental client with enhanced voice‑call performance and lower latency.