What are the best open-source voice agents?

The projects listed below, ranked by maintained adoption — GitHub stars plus recent activity — so you see what's genuinely used and still maintained, not abandoned.

Are open-source voice agents free?

The software is free to run and self-host. You still pay for the infrastructure you run it on and any model or API usage it makes.

Open-source or commercial voice agents — which should I choose?

Pick open source for control, privacy, and no lock-in when you're happy to host and maintain it; pick a commercial product for a managed, supported experience. You can compare both in the full voice agents category.

Open source · self-hostable

Best open-source voice agents

The open-source voice agents in the index — self-hostable, inspectable, and free to run. Ranked by real maintained adoption (GitHub stars and recent commit activity), never by sponsorship. Open source buys you control, privacy, and no vendor lock-in; the trade-off is that you host and maintain it yourself.

24 open-source records · all voice agents · how we rank

01xiaozhi-esp32-serverInfrastructure本项目为xiaozhi-esp32提供后端服务，帮助您快速搭建ESP32设备控制服务器。Backend service for xiaozhi-esp32, helps you quickly build an ESP32 device control server.JavaScript · 10.0k stars · MIT · Jul 2026JavaScript · 10.0k stars · MITVerified · Active 02ten-vadSDK / libraryVoice Activity Detector (VAD): low-latency, high-performance and lightweightC · 2.2k stars · Feb 2026C · 2.2k stars · Feb 2026Verified 03bailingAgent百聆是一个类似GPT-4o的语音对话机器人，通过ASR+LLM+TTS实现，集成DeepSeek R1等优秀大模型，接入openClaw，真正的个人语音助手，时延低至800ms，Mac等低配置也可运行，支持打断Python · 1.7k stars · MIT · Apr 2026Python · 1.7k stars · MITVerified 04RCLIAgentTalk to your Mac, query your docs, no cloud required. On-device voice AI + RAGC++ · 1.5k stars · MIT · Mar 2026C++ · 1.5k stars · MITVerified 05CyberVersePlatformSelf hosted, real-time digital human agent platform. Build voice-first AI agents with WebRTC, persona memory, tools, RAG, and optional digi…Python · 1.4k stars · GPL-3.0 · Jul 2026Python · 1.4k stars · GPL-3.0Verified · Active 06PatterSDK / libraryOpen-source voice-AI SDK. The Vapi/Retell alternative for builders who want to own the stack. Give your AI agent a phone number in 4 lines…Python · 919 stars · MIT · Jul 2026Python · 919 stars · MITVerified · Active 07rustpbxInfrastructureA PBX written by rustRust · 654 stars · MIT · Jul 2026Rust · 654 stars · MITVerified · Active 08echokit_serverPlatformOpen Source Voice Agent PlatformRust · 588 stars · GPL-3.0 · Feb 2026Rust · 588 stars · GPL-3.0Verified 09StarmoonFrameworkA conversational, AI device + software framework for companionship, entertainment, education, healthcare, IoT applications, and DIY robotic…TypeScript · 549 stars · GPL-3.0 · Mar 2026TypeScript · 549 stars · GPL-3.0Verified 10JARVISAgentYour own personal voice assistant: Voice to Text to LLM to Speech, displayed in a web interfacePython · 524 stars · GPL-3.0 · Jun 2024Python · 524 stars · GPL-3.0Verified 11deepgram-python-sdkSDK / libraryOfficial Python SDK for Deepgram.Python · 447 stars · MIT · Jul 2026Python · 447 stars · MITVerified · Active 12bolnaAgentEnd-to-end platform for building voice first multimodal agentsPython · 433 stars · MIT · Oct 2024Python · 433 stars · MITVerified

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13sutandoAgentMy AI Stand. Realtime by day, rewriting itself by night. Summon my AI superpower.Python · 353 stars · MIT · Jul 2026Python · 353 stars · MITVerified · Active 14LLMVoXSDK / libraryLLMVoX: Autoregressive Streaming Text-to-Speech Model for Any LLMPython · 308 stars · May 2025Python · 308 stars · May 2025Verified 15ai-avatar-systemAgentAI Avatar / digital human platform — upload a photo, clone a voice, talk to any face in real time with lip-sync video. Open-source, self…Python · 295 stars · MIT · Jun 2026Python · 295 stars · MITVerified · Active 16agent-second-brainAgentAn always-on second brain you talk to. Voice notes in Telegram → typed, linked knowledge in your Obsidian vault. Runs 24/7 on the Claude su…Python · 289 stars · MIT · Jun 2026Python · 289 stars · MITVerified · Active 17deepgram-js-sdkSDK / libraryOfficial JavaScript SDK for Deepgram.TypeScript · 266 stars · MIT · Jul 2026TypeScript · 266 stars · MITVerified · Active 18xybridSDK / libraryBuild apps powered by on-device AIRust · 264 stars · Apache-2.0 · Jul 2026Rust · 264 stars · Apache-2.0Verified · Active 19M.I.L.E.SAgentM.I.L.E.S, a GPT-4-Turbo voice assistant, self-adapts its prompts and AI model, can play any Spotify song, adjusts system and Spotify volum…Python · 233 stars · MIT · Dec 2024Python · 233 stars · MITVerified 20gdansk-aiAgentFull stack voice chatbotTypeScript · 199 stars · GPL-2.0 · Oct 2024TypeScript · 199 stars · GPL-2.0Verified 21active-callAgentA SIP/WebRTC voice agentRust · 173 stars · Jul 2026Rust · 173 stars · Jul 2026Verified · Active 22AI-Voice-AgentAgentSelf-hosted AI voice agentPython · 152 stars · MIT · Jun 2026Python · 152 stars · MITVerified · Active 23axiom-voice-agentAgentRun a <400ms latency Voice Agent on just 4GB VRAM. Fully offline, no API keys required. Optimized for GTX 1650 and edge robotics with zero-…Python · 136 stars · Apache-2.0 · May 2026Python · 136 stars · Apache-2.0Verified · Active 24BentoVoiceAgentAgentBuild Phone Calling Voice Agent fully powered by open source models.Python · 124 stars · Apr 2025Python · 124 stars · Apr 2025Verified

Frequently asked

What are the best open-source voice agents?: The projects listed below, ranked by maintained adoption — GitHub stars plus recent activity — so you see what's genuinely used and still maintained, not abandoned.
Are open-source voice agents free?: The software is free to run and self-host. You still pay for the infrastructure you run it on and any model or API usage it makes.
Open-source or commercial voice agents — which should I choose?: Pick open source for control, privacy, and no lock-in when you're happy to host and maintain it; pick a commercial product for a managed, supported experience. You can compare both in the full voice agents category.