Alternatives · Voice Agents
Patter alternatives
Looking for an alternative to Patter? Below are the voice agents in our index that do a similar job — open-source options are ranked by real maintained adoption (GitHub stars and recent commit activity), never by sponsorship. Patter is open source, so the list below includes both other self-hostable projects and commercial products.
Open-source voice-AI SDK. The Vapi/Retell alternative for builders who want to own the stack.
Open source · 1.0k stars · Python · MIT · updated Jul 2026
Commercial alternatives to Patter
Bland AIEnterprise platform for AI phone calls that sound human.Paid productPaid productElevenLabs AgentsConversational voice agents powered by ElevenLabs' leading speech models.FreemiumFreemiumRetell AIBuild production-ready AI phone agents with ultra-low latency.Paid productPaid productSynthflowNo-code AI voice agents for inbound and outbound calls.Paid productPaid productVapiDeveloper platform for building, testing, and deploying voice AI agents.Paid productPaid product
Open-source alternatives to Patter
ten-vadVoice Activity Detector (VAD): low-latency, high-performance and lightweightC · 2.2k stars · Feb 2026C · 2.2k stars · Feb 2026deepgram-python-sdkOfficial Python SDK for Deepgram.Python · 450 stars · MIT · Jul 2026Python · 450 stars · MITLLMVoXLLMVoX: Autoregressive Streaming Text-to-Speech Model for Any LLMPython · 308 stars · May 2025Python · 308 stars · May 2025xybridBuild apps powered by on-device AIRust · 297 stars · Apache-2.0 · Jul 2026Rust · 297 stars · Apache-2.0deepgram-js-sdkOfficial JavaScript SDK for Deepgram.TypeScript · 267 stars · MIT · Jul 2026TypeScript · 267 stars · MITxiaozhi-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.JavaScript · 10k stars · MIT · Jul 2026JavaScript · 10k stars · MITbailing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 · MITRCLITalk to your Mac, query your docs, no cloud required. On-device voice AI + RAGC++ · 1.5k stars · MIT · Mar 2026C++ · 1.5k stars · MITCyberVerseSelf hosted, real-time digital human agent platform. Build voice-first AI agents with WebRTC, persona memory, tools, RAG, and optional digital-human video.Python · 1.4k stars · GPL-3.0 · Jul 2026Python · 1.4k stars · GPL-3.0rustpbxA PBX written by rustRust · 722 stars · MIT · Jul 2026Rust · 722 stars · MITechokit_serverOpen Source Voice Agent PlatformRust · 589 stars · GPL-3.0 · Feb 2026Rust · 589 stars · GPL-3.0StarmoonA conversational, AI device + software framework for companionship, entertainment, education, healthcare, IoT applications, and DIY robotics.TypeScript · 549 stars · GPL-3.0 · Mar 2026TypeScript · 549 stars · GPL-3.0
JARVISYour own personal voice assistant: Voice to Text to LLM to Speech, displayed in a web interfacePython · 526 stars · GPL-3.0 · Jun 2024Python · 526 stars · GPL-3.0bolnaEnd-to-end platform for building voice first multimodal agentsPython · 432 stars · MIT · Oct 2024Python · 432 stars · MITsutandoMy AI Stand. Realtime by day, rewriting itself by night. Summon my AI superpower.Python · 353 stars · MIT · Jul 2026Python · 353 stars · MITagent-second-brainAn 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 · 322 stars · MIT · Jul 2026Python · 322 stars · MITai-avatar-systemAI 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 · 319 stars · MIT · Jul 2026Python · 319 stars · MITM.I.L.E.SM.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 · 233 stars · MIT · Dec 2024Python · 233 stars · MITgdansk-aiFull stack voice chatbotTypeScript · 199 stars · GPL-2.0 · Oct 2024TypeScript · 199 stars · GPL-2.0active-callA SIP/WebRTC voice agentRust · 180 stars · Jul 2026Rust · 180 stars · Jul 2026AI-Voice-AgentSelf-hosted AI voice agentPython · 158 stars · MIT · Jun 2026Python · 158 stars · MITaxiom-voice-agentRun 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 · 137 stars · Apache-2.0 · May 2026Python · 137 stars · Apache-2.0BentoVoiceAgentBuild Phone Calling Voice Agent fully powered by open source models.Python · 124 stars · Jul 2026Python · 124 stars · Jul 2026
Frequently asked
- What is the best alternative to Patter?
- It depends on whether you'd rather self-host or buy a managed product. ten-vad is the most widely-adopted open-source alternative (2.2k GitHub stars); Bland AI is one of the commercial options. Compare the full list above on adoption, license, and pricing.
- Is there a free or open-source alternative to Patter?
- Yes. ten-vad, deepgram-python-sdk, and LLMVoX are open-source voice agents you can self-host for free — you still pay for the infrastructure you run them on and any model or API usage. See the ranked open-source list above.
- How are these Patter alternatives ranked?
- Every product in the voice agents category is a candidate. Open-source alternatives are ranked by maintained adoption — GitHub stars plus recent commit activity — so you see what's genuinely used, not abandoned. Commercial products are listed separately and alphabetically, because stars don't measure commercial adoption. Sponsored placement is always labeled and never affects the ranking.