# 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, ranked by maintained GitHub adoption; sponsorship never affects the ranking. Browse on the web: https://agentsearchengine.app/best/open-source-voice-agents

## Ranked

1. [xiaozhi-esp32-server](https://agentsearchengine.app/agents/xiaozhi-esp32-server) — 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. · Open source · Infrastructure · 10k★ · JavaScript · MIT · active 5 days ago
2. [ten-vad](https://agentsearchengine.app/agents/ten-vad) — Voice Activity Detector (VAD): low-latency, high-performance and lightweight · Open source · SDK / library · 2.2k★ · C · active 5 months ago
3. [bailing](https://agentsearchengine.app/agents/bailing) — 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 · Open source · Agent · 1.7k★ · Python · MIT · active 3 months ago · best for experimenting with a low-latency chinese-language voice assistant on modest hardware
4. [RCLI](https://agentsearchengine.app/agents/rcli) — Talk to your Mac, query your docs, no cloud required. On-device voice AI + RAG · Open source · Agent · 1.5k★ · C++ · MIT · active 4 months ago
5. [CyberVerse](https://agentsearchengine.app/agents/cyberverse) — Self hosted, real-time digital human agent platform. Build voice-first AI agents with WebRTC, persona memory, tools, RAG, and optional digital-human video. · Open source · Platform · 1.5k★ · Python · GPL-3.0 · active 4 days ago
6. [Patter](https://agentsearchengine.app/agents/patter) — Open-source voice-AI SDK. The Vapi/Retell alternative for builders who want to own the stack. · Open source · SDK / library · 1.0k★ · Python · MIT · active 1 day ago
7. [rustpbx](https://agentsearchengine.app/agents/rustpbx) — A PBX written by rust · Open source · Infrastructure · 736★ · Rust · MIT · active today
8. [echokit_server](https://agentsearchengine.app/agents/echokit-server) — Open Source Voice Agent Platform · Open source · Platform · 589★ · Rust · GPL-3.0 · active 5 months ago
9. [Starmoon](https://agentsearchengine.app/agents/starmoon) — A conversational, AI device + software framework for companionship, entertainment, education, healthcare, IoT applications, and DIY robotics. · Open source · Framework · 549★ · TypeScript · GPL-3.0 · active 4 months ago
10. [JARVIS](https://agentsearchengine.app/agents/jarvis) — Your own personal voice assistant: Voice to Text to LLM to Speech, displayed in a web interface · Open source · Agent · 526★ · Python · GPL-3.0 · active 2 years ago
11. [deepgram-python-sdk](https://agentsearchengine.app/agents/deepgram-python-sdk) — Official Python SDK for Deepgram. · Open source · SDK / library · 454★ · Python · MIT · active 3 days ago
12. [bolna](https://agentsearchengine.app/agents/bolna) — End-to-end platform for building voice first multimodal agents · Open source · Agent · 432★ · Python · MIT · active 1 year ago
13. [sutando](https://agentsearchengine.app/agents/sutando) — My AI Stand. Realtime by day, rewriting itself by night. Summon my AI superpower. · Open source · Agent · 359★ · Python · MIT · active today
14. [ai-avatar-system](https://agentsearchengine.app/agents/ai-avatar-system) — AI 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. · Open source · Agent · 344★ · Python · MIT · active 5 days ago
15. [agent-second-brain](https://agentsearchengine.app/agents/agent-second-brain) — An 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. · Open source · Agent · 342★ · Python · MIT · active 18 days ago
16. [xybrid](https://agentsearchengine.app/agents/xybrid) — Build apps powered by on-device AI · Open source · SDK / library · 319★ · Rust · Apache-2.0 · active 1 day ago
17. [LLMVoX](https://agentsearchengine.app/agents/llmvox) — LLMVoX: Autoregressive Streaming Text-to-Speech Model for Any LLM · Open source · SDK / library · 308★ · Python · active 1 year ago
18. [deepgram-js-sdk](https://agentsearchengine.app/agents/deepgram-js-sdk) — Official JavaScript SDK for Deepgram. · Open source · SDK / library · 269★ · TypeScript · MIT · active 3 days ago
19. [M.I.L.E.S](https://agentsearchengine.app/agents/m-i-l-e-s) — M.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, · Open source · Agent · 233★ · Python · MIT · active 8 days ago
20. [gdansk-ai](https://agentsearchengine.app/agents/gdansk-ai) — Full stack voice chatbot · Open source · Agent · 199★ · TypeScript · GPL-2.0 · active 1 year ago
21. [active-call](https://agentsearchengine.app/agents/active-call) — A SIP/WebRTC voice agent · Open source · Agent · 184★ · Rust · active 3 days ago
22. [axiom-voice-agent](https://agentsearchengine.app/agents/axiom-voice-agent) — Run 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) · Open source · Agent · 136★ · Python · Apache-2.0 · active 2 months ago
23. [BentoVoiceAgent](https://agentsearchengine.app/agents/bentovoiceagent) — Build Phone Calling Voice Agent fully powered by open source models. · Open source · Agent · 125★ · Python · active 20 days ago
24. [AI-Voice-Agent](https://agentsearchengine.app/agents/ai-voice-agent) — Self-hosted AI voice agent · Open source · Agent · 35★ · Python · MIT · active 11 days ago

## FAQ

**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.

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Source: [Agent Search Engine](https://agentsearchengine.app) — https://agentsearchengine.app/best/open-source-voice-agents