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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. Right now it's led by xiaozhi-esp32-server (10k stars), with ten-vad and bailing close behind. Rankings shift as projects gain stars and ship commits.

24 open-source records · all voice agents · more best-of lists · how we rank

xiaozhi-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 · 10k stars · MIT · Aug 2026ten-vadSDK / libraryVoice Activity Detector (VAD): low-latency, high-performance and lightweightC · 2.2k stars · Feb 2026bailingAgent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 · 1.8k stars · MIT · Apr 2026CyberVersePlatformSelf hosted, real-time digital human agent platform. Build voice-first AI agents with WebRTC, persona memory, tools, RAG, and optional digital-human video.Python · 1.6k stars · GPL-3.0 · Aug 2026RCLIAgentTalk to your Mac, query your docs, no cloud required. On-device voice AI + RAGC++ · 1.5k stars · MIT · Mar 2026PatterSDK / libraryOpen-source voice-AI SDK. The Vapi/Retell alternative for builders who want to own the stack.Python · 1.0k stars · MIT · Aug 2026rustpbxInfrastructureA PBX written by rustRust · 745 stars · MIT · Aug 2026echokit_serverPlatformOpen Source Voice Agent PlatformRust · 590 stars · GPL-3.0 · Feb 2026StarmoonFrameworkA conversational, AI device + software framework for companionship, entertainment, education, healthcare, IoT applications, and DIY robotics.TypeScript · 549 stars · GPL-3.0 · Mar 2026JARVISAgentYour own personal voice assistant: Voice to Text to LLM to Speech, displayed in a web interfacePython · 525 stars · GPL-3.0 · Jun 2024deepgram-python-sdkSDK / libraryOfficial Python SDK for Deepgram.Python · 457 stars · MIT · Aug 2026bolnaAgentEnd-to-end platform for building voice first multimodal agentsPython · 431 stars · MIT · Oct 2024
Signal inventory open — put your agent in front of people choosing oneReserve a signal slot →
xybridSDK / libraryBuild apps powered by on-device AIRust · 412 stars · Apache-2.0 · Aug 2026ai-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-hosted. Claude · Whisper · Chatterbox · MuseTalk.Python · 412 stars · MIT · Jul 2026sutandoAgentMy AI Stand. Realtime by day, rewriting itself by night. Summon my AI superpower.Python · 374 stars · MIT · Aug 2026agent-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 subscription you already have.Python · 352 stars · MIT · Aug 2026LLMVoXSDK / libraryLLMVoX: Autoregressive Streaming Text-to-Speech Model for Any LLMPython · 309 stars · May 2025deepgram-js-sdkSDK / libraryOfficial JavaScript SDK for Deepgram.TypeScript · 271 stars · MIT · Aug 2026M.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 volume, performs calculations, browses the web and internet,Python · 234 stars · MIT · Jul 2026gdansk-aiAgentFull stack voice chatbotTypeScript · 199 stars · GPL-2.0 · Oct 2024active-callAgentA SIP/WebRTC voice agentRust · 186 stars · Aug 2026axiom-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-copy inference. (Apache 2.0)Python · 142 stars · Apache-2.0 · May 2026BentoVoiceAgentAgentBuild Phone Calling Voice Agent fully powered by open source models.Python · 128 stars · Jul 2026AI-Voice-AgentAgentSelf-hosted AI voice agentPython · 37 stars · MIT · Jul 2026

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.