ESPnet vs Fish Audio

ESPnet is an open-source toolkit for speech processing, including recognition, text-to-speech, translation, enhancement, speaker diarization, and spoken language understanding. It provides complete recipes for a range of tasks, plus tutorials, notebooks, and demos for existing models. Users can install ESPnet and espnet-model-zoo with pip to run inference on existing models; published models can also run in CPU or GPU inference containers without checking out the repository. Installation supports editable pip setup and optional dependency groups for tasks such as ASR, TTS, and speech enhancement. Training requires a separate extra that includes Lightning, TensorBoard, W&B, torch_optimizer, matplotlib, and Dask. Some task-specific packages must also be installed separately when a recipe needs them. ESPnet 1 is no longer supported, while ESPnet2 users can skip installing Kaldi. The toolkit is released under Apache License 2.0 and permits commercial use. It offers API access and lists Linux, macOS, Windows, and self-hosted platforms; WAV is the listed export format.

Fish Audio provides text-to-speech, voice cloning, speech-to-text, voice agents, and other audio tools. Its text-to-speech controls cover emotion and expression, real-time generation, multilingual output, speed, volume, and model parameters. Fish Audio says TTS supports eight languages with native accents and its platform hosts more than 2,000,000 voices. Developers can use the API for speech generation, voice cloning, and transcription through REST, WebSocket streaming, and official Python and TypeScript SDKs. The listed platforms include web, Linux, macOS, Windows, API access, and self-hosting. Use cases named by the company include video voiceovers, audiobook narration, character voices, and conversational chatbots. The Free Tier costs nothing and allows 8,000 monthly credits, up to 7 minutes of generation, and personal, non-commercial use. Plus costs $11 a month, billed $132 billed annually; paid plans are listed from $15/mo. Commercial use is listed as available. Enterprise deployments include VPC, on-premises, air-gapped, and sovereign cloud options. Fish Audio says default data stays in the United States and self-hosted deployments run inside customer infrastructure. Unused monthly minutes do not roll over.