Bolna.
An end-to-end voice-agent orchestration framework for ASR, LLM, TTS, WebSockets, and telephony, with an optional hosted platform.
What you are adopting
Repository and documentation checked 2026-07-17. Always re-check license and release activity before adoption.
When Bolna 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
Builders who want an India-built OSS orchestrator plus an upgrade path to hosted APIs.
Operational trade-off
The open repository is the orchestration layer; Bolna documents its hosted API and no-code UI as separate products.
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.