WebRTC SFU + SDKs · Go · Apache-2.0
⭐ The strongest single choice for app-to-app voice and video. Apache-2.0, Go, actively developed, SDKs for web and mobile, and it does rooms rather than raw peer plumbing.
Last push 2026-09-07 · 20766 stars at survey time. github.com/livekit/livekit
Engineering and regulatory orientation, not legal advice. The FCC obligations named here are real and enforced; confirm your own position with counsel before carrying a single call to a phone number.