Open source voice AI platform. Self-hosted alternative to Vapi and Retell. On Prem, BYOK across Speech to Speech or LLM/STT/TTS, with a visual workflow builder, MCP native and telephony support.
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Speech To Speech GitHub Repositories (2026) · Open Source Tools
Discover the best Speech To Speech open source repositories on GitHub. Explore trending tools, live star counts, source code, and developer projects updated daily.
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7 matching projects · updated Nov 12, 2026
How we rank ↗
Sophon-Realtime v1.1: open full-duplex voice models that hear your tone and speak with one. Zero-shot voice cloning, one GPU with vLLM-Omni, OpenAI Realtime / GPT-Live compatible. Apache-2.0.
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AI speech toolkit for Apple Silicon — ASR, TTS, speech-to-speech, VAD, and diarization powered by MLX and CoreML
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A modular Swift SDK for audio processing with MLX on Apple Silicon
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A simple, high-quality voice conversion tool focused on ease of use and performance.
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Featured Developer Tools & Services
Self-hosted, API-first AI call center. Realtime voice bots answer every call, human agents take over without a drop. Full REST + SSE API with OpenAPI spec to embed in your product. FreeSWITCH + OpenAI Realtime / Qwen, one Go binary.
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Self-hosted voice gateway in Go that speaks the OpenAI Realtime (GA) WebSocket protocol and runs a cascaded ASR → LLM → TTS pipeline behind it. Keep clients unchanged while swapping speech and LLM providers at runtime
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