Kitten TTS – 25MB CPU-Only, Open-Source TTS Model
Kitten TTS is an open-source series of tiny and expressive text-to-speech models for on-device applications. We are excited to launch a preview of our smallest model, which is less than 25 MB. This model has 15M parameters. This release supports English text-to-speech applications in eight voices: four male and four female. The model is quantized to int8 + fp16, and it uses onnx for runtime. The model is designed to run literally anywhere eg. raspberry pi, low-end smartphones, wearables, browsers etc. No GPU required! We're releasing this to give early users a sense of the latency and voices…
Kitten TTS – 25MB CPU-Only, Open-Source TTS Model launched on August 6, 2025 with 1,003 votes, #4 of 8,530 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Kitten TTS is an open-source text-to-speech model smaller than 25 MB, designed to run on resource-limited devices like Raspberry Pi, smartphones, wearables, and browsers without requiring a GPU. It offers eight English voices—four male and four female—and uses int8 and fp16 quantization with ONNX runtime for efficiency. The model is intended for developers building on-device speech synthesis applications where cloud alternatives are impractical.
written from the facts on this page · September 2026
From the sources
🚀 KittenTTS – Ultra-Tiny, Supurr-Expressive Open Source TTS Just spotted an awesome open-source TTS release for builders, hackers, and anyone who loves running clever AI on any device. 8 expressive voices (4 female, 4 male) Open source and free for all
State-of-the-art TTS model under 25MB 😻 . Contribute to KittenML/KittenTTS development by creating an account on GitHub.
In the maker’s words, at launch
Kitten TTS is an open-source series of tiny and expressive text-to-speech models for on-device applications. We are excited to launch a preview of our smallest model, which is less than 25 MB. This model has 15M parameters. This release supports English text-to-speech applications in eight voices: four male and four…
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