Free · Agents · 7 of 10 tools · updated Oct 27, 2026
Free AI tools for voice & phone agents
Pipecat is the strongest tool for voice & phone agents you can use without paying, at 42/100. What you get for nothing: BSD-2; you pay only the services you plug in. 7 of the 10 tools tracked for this job have a free tier, an open-source licence, or are free outright. It is also the top-ranked tool for this job overall, free or not.
Same evidence score as the ranking — GitHub stars, Hacker News mentions, Wikipedia readership, release activity, free access — recomputed nightly, never sold. See all 10 tools for voice & phone agents.
Top 3
evidence / 100
+ The pipeline is explicit, so interruption handling and turn-taking are yours to tune.
− A library, not a dashboard: no call logs or flow editor unless you build them.
+ WebRTC underneath means in-app and in-browser voice, not only phone calls.
− You run the media plane or pay for theirs - the framework alone is not a product.
+ Among the fastest real-time transcription APIs available, with diarization and keyword boosting built in.
− Developer-only; there is no end-user app, and accuracy on heavily accented speech trails Whisper-class models.
All 7, side by side
| Tool | Score | Pricing | What you get free | Platforms |
|---|---|---|---|---|
| Pipecat | 42 | Open source | BSD-2; you pay only the services you plug in | api, cli, linux, mac |
| LiveKit Agents | 37 | Open source | Apache 2.0; LiveKit Cloud is the paid hosted transport | web, api, cli, linux |
| Deepgram | 17 | Free tier | $200 free credit; Nova STT from about $0.0043/min | api |
 Cartesia | 9 | Free tier | Free credits to try; usage-based after | api, web |
| EElevenLabs Agents | 9 | Free tier | Free tier to build; paid by conversation minutes | web, api |
 Inworld AI | 9 | Free tier | usage-based; free tier | api, web |
 Synthflow | 9 | Free tier | Free minutes to build with; paid plans by call minutes and seats | web, api |
A free tier counts, and so does an open-source licence you can self-host — both are in the table, so a tool that is only free for a trial is not here.
Head to head: Pipecat vs LiveKit Agents Pipecat vs Deepgram LiveKit Agents vs Deepgram