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Vapi Alternatives

3 alternatives to Vapi — free and paid AI coding tools covering similar jobs, with pricing and standout strengths.

Full comparison: Realtime Voice Agents: Build on LiveKit, Buy Vapi, or Pipeline with Pipecat

Looking for a Vapi alternative? Vapi is listed under Voice (paid). The 3 tools below cover similar jobs, closest matches first — the table compares pricing, license, and platforms so you can shortlist quickly, and each entry further down adds a fuller summary and a link to the full profile.

ToolPricingLicensePlatformsCategory
Cartesiafreemium—WebVoice
LivekitfreemiumApache-2.0Web, macOS, Windows, LinuxVoice
Pipecatopen sourceBSD-2-ClauseLinux, macOS, WindowsVoice

Free and open-source alternatives to Vapi

Vapi alternatives in detail

  1. Cartesia

    freemiumWebVoice

    Cartesia builds voice AI on state-space models: Sonic streaming TTS — vendor-claimed sub-100ms model latency, 42 languages, emotion controls — Ink streaming STT with turn detection native to the model, and Line, a code-first platform for deploying voice agents with hosted infra, telephony, and evals. Freemium credits; commercial use starts at the low-cost Pro tier.

    Read: Realtime Voice Agents: Build on LiveKit, Buy Vapi, or Pipeline with Pipecat

  2. Livekit

    freemiumApache-2.0Web, macOS, Windows, LinuxVoice

    LiveKit is the open-source realtime stack voice AI standardized on: an Apache-2.0 WebRTC server plus the LiveKit Agents framework (Python/Node) wiring STT→LLM→TTS or speech-to-speech models, with an open multilingual turn-detection model, full telephony (SIP, DTMF, transfers), and LiveKit Cloud as the managed network. Self-host free; cloud freemium with metered minutes.

    Read: Realtime Voice Agents: Build on LiveKit, Buy Vapi, or Pipeline with Pipecat

  3. Pipecat

    open sourceBSD-2-ClauseLinux, macOS, WindowsVoice

    Pipecat is an open-source Python framework for building real-time voice and multimodal conversational agents. It orchestrates the streaming STT → LLM → TTS loop, the audio transport (WebRTC/WebSocket), and turn-taking into composable pipelines, with integrations across dozens of speech and model providers — so you build the agent's behavior instead of the real-time plumbing.

    Read: Realtime Voice Agents: Build on LiveKit, Buy Vapi, or Pipeline with Pipecat