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Automated best-of radar

Best Free Voice agents options.

Candidates with a source-backed free tier, free endpoint, free trial, pretrained download, open weights, open-source license, or self-hosted path. Automated radar for live audio, turn-taking, telephony, and real-time voice agent platforms. Rankings use existing source-backed radar data and do not invent prices, benchmark scores, release dates, or capabilities.

Candidates
8
matched automatically
Top fit
100
Gemini Live API
Sources
12
canonical links retained
Access
Free/open
filtered automatically
Updated
Oct 3, 2026
waiting for more evidence
All10Free/open8Paid API8Open source3

Voice agents decision paths

Methodology
Best Voice agentsreal-time voice agents, telephony, turn-taking, tool calling, and production API workflows.Free Voice agentsFree tier, trial, open-weight, downloadable, or self-hosted signals when sources support them.Open-source Voice agentsOpen-source, open-weight, downloadable, or self-hosted candidates with retained source URLs.Paid API Voice agentsHosted API and enterprise access paths without invented prices, limits, or benchmark claims.Compare Voice agentsSide-by-side verdicts, source coverage, freshness, access labels, and evidence caveats.Track Voice agentsGet private RSS alerts and API-access interest for this decision space as the radar updates.
Best overall radar pick

Gemini Live API

Highest automated fit score using source-backed task evidence and radar signals.

Score100serviceGoogle
Best API or hosted option

Gemini Live API

Strong candidate when the source metadata indicates API or hosted-service availability.

Score100serviceGoogle
Best open-source option

LiveKit Agents

Strong candidate when open weights, GitHub, permissive license, or self-hosting signals are visible.

Score88serviceLiveKit
Best developer momentum

Osmantic/ODS

Strong candidate with fresh GitHub, Hub, Product Hunt, or radar momentum.

Score63repoOsmantic
#CandidateTypeAccessSourceFitUpdatedWhy it matchedEvidence
01Gemini Live APIGoogle API serviceservicePaid APIOfficial service pageScore100Jun 26, 2026Matched voice agent, realtime voice, real-time voice; 2 source links; official service signal; access model: Paid APIai.google.dev
02LiveKit AgentsLiveKit frameworkservicePaid APIOfficial service pageScore88Jun 26, 2026Matched voice agent, realtime voice, telephony agent; 2 source links; official service signal; access model: Paid APIdocs.livekit.io
03Deepgram Speech AIDeepgram API serviceservicePaid APIOfficial service pageScore79Jun 26, 2026Matched voice agent, voice agents, realtime voice; 2 source links; official service signal; access model: Paid APIdeepgram.com
04Gemini Live TranslationGoogle API serviceservicePaid APIOfficial service pageScore75Jun 26, 2026Matched live audio, speech-to-speech, speech to speech; 1 source link; official service signal; access model: Paid APIai.google.dev
05Google Gemini APIGoogle API serviceservicePaid APIOfficial service pageScore74Jun 26, 2026Matched voice agent, live audio; 2 source links; official service signal; access model: Paid APIai.google.dev
06Cartesia Voice APICartesia API serviceservicePaid APIOfficial service pageScore73Jun 26, 2026Matched voice agent, realtime voice; 2 source links; official service signal; access model: Paid APIdocs.cartesia.ai
07Osmantic/ODSPython repositoryrepoOpen sourceGitHubScore63Jul 28, 2026Matched voice agent, voice agents; 1 source link; access model: Open source; open weights signalgithub.com
08mohameddalii/coda-llm-datamohameddalii modelmodelOpen weightsHugging Face ModelsScore62Oct 3, 2026Matched voice agent, voice agents; 2 source links; access model: Open weights; freshly updatedhuggingface.co

Related automated lists

All best-of pages
Speech-to-speechBuild voice-to-voice agents, live translation, dubbing, and speech-native AI workflows.Speech-to-textTranscribe speech, meetings, calls, media, and live audio into text.Text-to-speechGenerate speech, product voices, narration, voice agents, and multilingual audio.

Decision pages

Methodology
Voice agent APIs for low latencyUse-case listGemini Live API vs LiveKit AgentsLive comparisonGemini Live API vs Deepgram Speech AILive comparisonLiveKit Agents vs Deepgram Speech AILive comparisonDeepgram Speech AI vs Google Gemini APILive comparisonBest Gemini Live API alternativesAlternativesBest LiveKit Agents alternativesAlternativesBest Deepgram Speech AI alternativesAlternatives
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