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Automated best-of radar

Best Paid Voice agents options.

Candidates with a source-backed paid API, usage-based hosted API, or enterprise access 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
OpenAI Realtime API
Sources
14
canonical links retained
Access
Paid API
filtered automatically
Updated
Jun 26, 2026
listed in sitemap
All10Free/open6Paid API8Open source1
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.

RDR91serviceLiveKit
Best developer momentum

OpenAI Realtime API

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

RDR100serviceOpenAI
#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 pageRDR92Jun 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 pageRDR91Jun 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 pageRDR82Jun 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 pageRDR79Jun 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 pageRDR77Jun 26, 2026Matched voice agent, live audio; 2 source links; official service signal; access model: Paid APIai.google.dev
08Cartesia Voice APICartesia API serviceservicePaid APIOfficial service pageRDR76Jun 26, 2026Matched voice agent, realtime voice; 2 source links; official service signal; access model: Paid APIdocs.cartesia.ai

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