FastRTC.
A Python library for adding low-latency WebRTC and WebSocket audio or video streams to applications, including voice-agent patterns.
What you are adopting
Repository and documentation checked 2026-07-17. Always re-check license and release activity before adoption.
When FastRTC belongs on the shortlist
The strongest framework is the one that matches your ownership boundary, not the one with the longest provider list.
Best fit
Rapid Python prototypes and custom realtime interfaces that do not need a full call-operations platform.
Operational trade-off
FastRTC is a media/application library, not a bundled telephony, campaign, analytics, or compliance product.
Cost model
Open-source code does not make the full call free. Budget separately for speech models, language models, telephony, phone numbers, recording, storage, observability, compute, support, and the engineering time needed to keep a realtime service healthy.
Inspect the project directly
Repository metadata can drift. Use the source and current documentation for a final technical or legal decision.