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Ranked · Voice agents

Best Voice agents — Bring your own key

6 of 13 researched voice agents have a confirmed yes for Bring your own key. Qualified, negative, and unknown answers stay distinct.

6 of 13 voice agents have a confirmed yes for “Bring your own key”. 3 are qualified or tier-scoped, 2 are confirmed no, and 2 remain not established. Only confirmed yes answers appear in this set; an unknown is never treated as a negative.

How we ranked these

Projected from the live listing datasheets using the tenant’s “Your own inference, your own keys, or your own cloud?” axis. Membership requires a sourced yes; partial and unknown answers are reported above but excluded from the ranking. Entries retain the directory’s paid-tier ordering, visibly labelled on every promoted card.

The full ranking method →

All picks at a glance

All 6 compared on one screen. Pick a row to jump to the full entry.

#AgentBest forFrom
1Cartesia$0 / month
2Deepgram Voice Agent API$4.50/hr Standard / Standard to Custom (BYO LLM and TTS)
3ElevenLabs ElevenAgents$0 / mo
4LiveKit Agents$0 / month
5PolyAICustom (per minute, sales-led)
6Vapi$0.05 / min

The ranking

  1. Editor’s pick

    #1

    Cartesia

    Streaming text-to-speech and speech-to-text APIs with a managed runtime for deployed voice agents.

    Visit Cartesia ↗Read the review →Get a quote →from $0 / month
  2. #2

    Deepgram Voice Agent API

    One WebSocket API that runs speech-to-text, LLM orchestration and text-to-speech for real-time voice agents.

    Visit Deepgram Voice Agent API ↗Read the review →Get a quote →from $4.50/hr Standard / Standard to Custom (BYO LLM and TTS)
  3. #3

    ElevenLabs ElevenAgents

    Voice and chat agent platform built on ElevenLabs speech models, deployed to web, mobile and telephony.

    Visit ElevenLabs ElevenAgents ↗Read the review →Get a quote →from $0 / mo

  4. Advertisement

    Your agent here. Go Featured and sit above the free listings in this ranking, or buy the slot beside it. Every paid unit and every paid row wears the Advertisement label above — and the verdict, the facts, the exclusions and the quality gate are not for sale.

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  5. #4

    LiveKit Agents

    Open-source framework and hosted realtime infrastructure for building and running production voice agents

    Visit LiveKit Agents ↗Read the review →Get a quote →from $0 / month
  6. #5

    PolyAI

    Enterprise platform for building and running voice and chat agents that resolve customer calls

    Visit PolyAI ↗Read the review →Get a quote →from Custom (per minute, sales-led)
  7. #6

    Vapi

    Developer platform for building, testing and deploying voice AI agents over phone, SIP and the web.

    Visit Vapi ↗Read the review →Get a quote →from $0.05 / min

Side by side

All 6 compared. Scroll the table sideways, the fact column stays pinned →

FeatureCartesiaDeepgram Voice Agent APIElevenLabs ElevenAgentsLiveKit AgentsPolyAIVapi
DescriptionStreaming text-to-speech and speech-to-text APIs with a managed runtime for deployed voice agents.One WebSocket API that runs speech-to-text, LLM orchestration and text-to-speech for real-time voice agents.Voice and chat agent platform built on ElevenLabs speech models, deployed to web, mobile and telephony.Open-source framework and hosted realtime infrastructure for building and running production voice agentsEnterprise platform for building and running voice and chat agents that resolve customer callsDeveloper platform for building, testing and deploying voice AI agents over phone, SIP and the web.
CategoryVoice agentsVoice agentsAgent platforms, Voice agentsVoice agentsVoice agentsVoice agents
Pricing$0 / month$4.50/hr Standard / Standard to Custom (BYO LLM and TTS)$0 / mo$0 / monthCustom (per minute, sales-led)$0.05 / min
TagsAPIEnterpriseClaudeFree tierOpen modelsGPTOpen sourceMulti-agentNo-codeAPIEnterpriseSelf-hostedGPTClaudeMulti-agentOpen modelsAutonomousAPIFree tierNo-codeAutonomousEnterpriseOpen modelsGPTClaudeOpen sourceSelf-hostedFree tierAPIGPTClaudeEnterpriseMulti-agentEnterpriseAutonomousAPINo-codeClaudeGPTAPIAutonomousMulti-agentEnterpriseGPTClaude

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The digestFree

Which agents actually ship.

What we re-checked, what got added, and one number from the index. Tuesdays.

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This ranking

  • 6 agents ranked
  • 6 of 6 with known API status offer an API
  • paid plans $4.50-$50
  • 3 free or freemium
  • verified August 31, 2026
How we rank →

Advertise here

Reach buyers mid-decision. Put your brand in front of them — advertising slots are open to any advertiser (see the content policy), and listed agents can go Featured at the top of their category. Every paid unit and every paid row is labelled "Advertisement" where it renders.

Featured — top of your category →Advertise on this page →

Advertise here

Reach buyers mid-decision. Put your brand in front of them — advertising slots are open to any advertiser (see the content policy), and listed agents can go Featured at the top of their category. Every paid unit and every paid row is labelled "Advertisement" where it renders.

Featured — top of your category →Advertise on this page →

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