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Best AI tools for voice agents

Five AI tools are listed for voice agents, and four of them have a free plan. Cartesia is described as providing real-time voice agents through an API, while two others have text to speech as their primary task. Chatbase is described as a platform for building AI agents across chat, email and voice.

The ranked list

  1. 1

    Voice.ai

    Generates speech and clones voices

    Voice agentsWeb appAPI

    Free plan

    Voice agents for inbound and outbound calls, plus text to speech, a real-time voice changer and voice cloning, via web app or API. Free plan includes 5k credits per month.

  2. 2

    Cartesia

    Runs real-time voice AI agents

    Voice agentsAPI

    Free plan

    Voice agents that answer and make calls, with text-to-speech and speech-to-text models in one API and a Managed Agents platform. SOC 2 Type II certified; free plan with 20K credits monthly.

  3. 3

    ElevenLabsalso does this

    Generates speech and music

    Text to speechAPI

    Free plan

    Voice generator and voice agents platform covering text to speech in 90+ languages, speech to text, dubbing and voice and chat agents. Free plan includes 10k credits per month.

  4. 4

    Murf AIalso does this

    Generates speech and voice agents

    Text to speechWeb appAPI

    Free plan

    Text to speech with 200+ voices in 35+ languages, a sub-100ms time-to-first-audio API, and AI video dubbing in 40+ languages. Also builds inbound and outbound voice agents.

  5. 5

    Chatbasealso does this

    Builds AI agents for customer care

    Customer support chatbotsAPI

    Free trial

    Builds AI agents deployed across chat, email, WhatsApp and Slack, with phone voice agents on Standard plan and above. Free trial offered; Hobby plan is USD 32/month billed annually.

  6. 6

    Respeecheralso does this

    Generates voice clones and speech

    Voice cloningPlugin or MCPAPIWeb app

    Respeecher generates AI voices through voice cloning, speech synthesis and an API, for film, game, podcast and advertising teams.

List updated 18 Oct 2026