Seed-VC is an open-source voice conversion project that changes one speaker's voice into another without per-speaker training.
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OpenVoice is an open-source instant voice cloning model created by researchers at MIT and Tsinghua University together with MyShell.
GPT-SoVITS is an open-source WebUI for few-shot voice conversion and text-to-speech.
DDSP-SVC is an open-source singing voice conversion project that runs on personal computers.
Kokoro is an open-weight text-to-speech model with 82 million parameters.
Pipecat is an open-source Python framework for building voice and multimodal AI agents that talk in real time.
Google Cloud Speech-to-Text is a speech recognition API that turns audio into written text.
Clone voices for singing
Sub-second speech-to-text across 55+ languages with AI voice agents
Managing multiple speech API accounts
Hume EVI, the Empathic Voice Interface, is a voice AI API for building agents that pick up on how a person sounds as well as what they say.
Cartesia is a voice AI company that provides one API for speech generation, transcription and production voice agents fast enough for live conversation.
Deepgram is a voice AI platform that exposes speech-to-text, text-to-speech and conversational agents through APIs.
The Deepgram Voice Agent API is one real-time API that combines speech recognition, language model orchestration and speech synthesis, so developers do not have to stitch separate services together.