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Automated best-of radar

Best Voice agents radar.

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
11
matched automatically
Top fit
100
OpenAI Realtime API
Sources
17
canonical links retained
Access
All
all access paths
Updated
Jul 28, 2026
listed in sitemap
All11Free/open7Paid API8Open source2

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

OpenAI Realtime API

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

RDR100serviceOpenAI
Best API or hosted option

OpenAI Realtime API

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

RDR100serviceOpenAI
Best open-source option

LiveKit Agents

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

RDR89serviceLiveKit
Best developer momentum

Osmantic/ODS

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

RDR65repoOsmantic
Best research signal

Introducing Real World VoiceEQ: A New Benchmark for Voice AI Quality

Strong paper or research-linked candidate when a source-backed research signal exists.

RDR61articleSource: Hugging Face blog post "Introducing Real World VoiceEQ: Measuring the human quality of voice AI"
#CandidateTypeAccessSourceFitUpdatedWhy it matchedEvidence
01OpenAI Realtime APIOpenAI API serviceservicePaid APIOfficial service pageRDR100Jun 26, 2026Matched voice agent, voice agents, realtime voice; 2 source links; official service signal; access model: Paid APIdevelopers.openai.com
02Gemini Live APIGoogle API serviceservicePaid APIOfficial service pageRDR100Jun 26, 2026Matched voice agent, realtime voice, real-time voice; 2 source links; official service signal; access model: Paid APIai.google.dev
03Hume Empathic Voice InterfaceHume AI API serviceservicePaid APIOfficial service pageRDR89Jun 26, 2026Matched voice agent, realtime voice, speech-to-speech; 2 source links; official service signal; access model: Paid APIdev.hume.ai
04LiveKit AgentsLiveKit frameworkservicePaid APIOfficial service pageRDR89Jun 26, 2026Matched voice agent, realtime voice, telephony agent; 2 source links; official service signal; access model: Paid APIdocs.livekit.io
05Deepgram Speech AIDeepgram API serviceservicePaid APIOfficial service pageRDR80Jun 26, 2026Matched voice agent, voice agents, realtime voice; 2 source links; official service signal; access model: Paid APIdeepgram.com
06Gemini Live TranslationGoogle API serviceservicePaid APIOfficial service pageRDR76Jun 26, 2026Matched live audio, speech-to-speech, speech to speech; 1 source link; official service signal; access model: Paid APIai.google.dev
07Google Gemini APIGoogle API serviceservicePaid APIOfficial service pageRDR75Jun 26, 2026Matched voice agent, live audio; 2 source links; official service signal; access model: Paid APIai.google.dev
08ElatoAI: Realtime Voice AI for Arduino ESP32 DevicesAI ToolsarticlePricing not verifiedAI on Radar articleRDR75May 26, 2026Matched realtime voice, real-time voice, speech-to-speech; 1 source link; access model: Pricing not verifiedgithub.com
09Cartesia Voice APICartesia API serviceservicePaid APIOfficial service pageRDR74Jun 26, 2026Matched voice agent, realtime voice; 2 source links; official service signal; access model: Paid APIdocs.cartesia.ai
10Osmantic/ODSPython repositoryrepoOpen sourceGitHubRDR65Jul 28, 2026Matched voice agent, voice agents; 1 source link; access model: Open source; open weights signalgithub.com
11Introducing Real World VoiceEQ: A New Benchmark for Voice AI QualityBenchmarksarticlePricing not verifiedAI on Radar articleRDR61Jul 15, 2026Matched voice agent, voice agents; 1 source link; access model: Pricing not verifiedhuggingface.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 telephonyUse-case listVoice agent APIs for low latencyUse-case listOpenAI Realtime API vs Gemini Live APILive comparisonGemini Live API vs Hume Empathic Voice InterfaceLive comparisonOpenAI Realtime API vs Hume Empathic Voice InterfaceLive comparisonGemini Live API vs LiveKit AgentsLive comparisonBest Gemini Live API alternativesAlternativesBest OpenAI Realtime API alternativesAlternatives
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