# 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.

Browse on the web: https://agentsearchengine.app/alternatives/patter

## Commercial alternatives (alphabetical — stars don't measure commercial adoption)

- [Bland AI](https://agentsearchengine.app/agents/bland-ai) — Enterprise platform for AI phone calls that sound human. · Paid product · Platform · best for enterprises running high-volume outbound and inbound ai phone calls
- [ElevenLabs Agents](https://agentsearchengine.app/agents/elevenlabs-agents) — Conversational voice agents powered by ElevenLabs' leading speech models. · Freemium · Platform · best for voice agents that need best-in-class speech quality and voice cloning
- [Retell AI](https://agentsearchengine.app/agents/retell-ai) — Build production-ready AI phone agents with ultra-low latency. · Paid product · Platform · best for production ai phone agents with low latency and strong call-handling primitives
- [Synthflow](https://agentsearchengine.app/agents/synthflow) — No-code AI voice agents for inbound and outbound calls. · Paid product · Platform · best for no-code teams launching ai phone agents quickly
- [Vapi](https://agentsearchengine.app/agents/vapi) — Developer platform for building, testing, and deploying voice AI agents. · Paid product · Platform · best for developers building production voice agents with full api control over models, voices, and telephony

## Open-source alternatives (ranked by adoption)

1. [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
2. [deepgram-python-sdk](https://agentsearchengine.app/agents/deepgram-python-sdk) — Official Python SDK for Deepgram. · Open source · SDK / library · 450★ · Python · MIT · active 2 days ago
3. [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
4. [xybrid](https://agentsearchengine.app/agents/xybrid) — Build apps powered by on-device AI · Open source · SDK / library · 297★ · Rust · Apache-2.0 · active today
5. [deepgram-js-sdk](https://agentsearchengine.app/agents/deepgram-js-sdk) — Official JavaScript SDK for Deepgram. · Open source · SDK / library · 267★ · TypeScript · MIT · active 2 days ago
6. [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 today
7. [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
8. [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
9. [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 · 1.4k★ · Python · GPL-3.0 · active 1 day ago
10. [rustpbx](https://agentsearchengine.app/agents/rustpbx) — A PBX written by rust · Open source · Infrastructure · 722★ · Rust · MIT · active today
11. [echokit_server](https://agentsearchengine.app/agents/echokit-server) — Open Source Voice Agent Platform · Open source · Platform · 589★ · Rust · GPL-3.0 · active 4 months ago
12. [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 3 months ago
13. [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
14. [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
15. [sutando](https://agentsearchengine.app/agents/sutando) — My AI Stand. Realtime by day, rewriting itself by night. Summon my AI superpower. · Open source · Agent · 353★ · Python · MIT · active today
16. [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 · 322★ · Python · MIT · active 1 day ago
17. [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 · 319★ · Python · MIT · active 4 days ago
18. [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 1 year ago
19. [gdansk-ai](https://agentsearchengine.app/agents/gdansk-ai) — Full stack voice chatbot · Open source · Agent · 199★ · TypeScript · GPL-2.0 · active 1 year ago
20. [active-call](https://agentsearchengine.app/agents/active-call) — A SIP/WebRTC voice agent · Open source · Agent · 180★ · Rust · active 2 days ago
21. [AI-Voice-Agent](https://agentsearchengine.app/agents/ai-voice-agent) — Self-hosted AI voice agent · Open source · Agent · 158★ · Python · MIT · active 25 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 · 137★ · Python · Apache-2.0 · active 1 month ago
23. [BentoVoiceAgent](https://agentsearchengine.app/agents/bentovoiceagent) — Build Phone Calling Voice Agent fully powered by open source models. · Open source · Agent · 124★ · Python · active 3 days ago

## FAQ

**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.

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Source: [Agent Search Engine](https://agentsearchengine.app) — https://agentsearchengine.app/alternatives/patter