> ## Content Index
> Fetch the complete content index at: https://www.stirup.si/llms.txt
> Use this file to discover other available public pages before exploring further.

# Open-Source and Research-Focused TTS Models and Commercial Solutions
- URL: https://www.stirup.si/open-source-and-research-focused-tts-models-and-commercial-solutions-4014d69a/
- Published: 2026-10-13T22:23:53.000Z
- Updated: 2026-10-13T22:23:53.000Z
- Description: The Awesome-llms-labs/Awesome-llm-tts repository curates open-source and research-focused text-to-speech (TTS) models, including Fish Speech and Kyutai TTS, alongside commercial solutions like WellSaid Labs and Descript Overdub.
- Author: Satish Das
- Tags: News, Stirup Research

## Open-Source and Research-Focused TTS Models

The *Awesome-llms-labs/Awesome-llm-tts* repository curates open-source and research-focused text-to-speech (TTS) models, offering a comprehensive resource for developers and researchers. Among the highlighted projects is **Fish Speech**, an open-weight multilingual TTS series from Fish Audio, which permits free use for research and non-commercial purposes, with commercial applications requiring a separate license. Another notable entry is **Kyutai TTS**, a streaming TTS line featuring a 1.6B-parameter model and a 0.75B public-data variant, built on the delayed-streams multistream architecture. For training data, **Emilia** provides a 101k-hour multilingual in-the-wild speech dataset, available for non-commercial research and educational use only. **Multilingual LibriSpeech (MLS)** offers a \~50k-hour ASR-derived corpus in eight languages, while **Common Voice** from Mozilla includes a crowdsourced multilingual corpus with over 100 languages, though it requires heavy filtering for TTS due to variable audio quality.

## Commercial and Enterprise TTS Solutions

Commercial and enterprise text-to-speech (TTS) solutions are increasingly being adopted for professional voiceover production and AI-driven content creation. **WellSaid Labs** offers studio-quality AI voice avatars with over 200 pre-built voices and AI Director pronunciation control, accessible via a documented REST API, making it suitable for enterprise-level voiceover production. **Descript Overdub** provides voice cloning capabilities that are integrated into Descript’s text-based audio and video editing platform, allowing users to generate new speech by typing in their own cloned voice. These tools are tailored for businesses requiring high-quality, customizable voice outputs. Notably, **Play.ht / PlayAI** was excluded from this list due to its platform shutdown on December 31, 2025, following a Meta acqui-hire, as reported by Bloomberg on July 12, 2025.

## Notable Exclusions and Shutdowns

The Awesome-llms-labs/Awesome-llm-tts repository highlights several notable exclusions and shutdowns in the LLM-era text-to-speech (TTS) landscape. Replica Studios ceased operations on June 30, 2025, with its site now offline. LMNT shut down as of October 1, 2026, with its website displaying a shutdown notice. Coqui (company) closed in January 2025, though its TTS repository remains community-maintained. Papercup’s IP was acquired by RWS in June 2025, ending its status as an independent TTS product. rhasspy/piper was archived in October 2025, with the OHF-Voice/piper1-gpl fork now listed as the maintained version. fairseq is archived and read-only, with TTS coverage directed to live toolkits. TensorFlowTTS and FastSpeech2 implementations are marked as stale and superseded by other maintained projects.

## Sources and reporting notes

- [github.com](https://github.com/Awesome-llms-labs/Awesome-llm-tts/tree/main/?ref=stirup.si)

Based on published source material. No independent hands-on testing is claimed.