We’ve just released Neuphonic TTS Air, a lightweight open-source speech foundation model under Apache 2.0.

The main idea: frontier-quality text-to-speech, but small enough to run in realtime on CPU. No GPUs, no cloud APIs, no rate limits.

Why we built this: - Most speech models today live behind paid APIs → privacy tradeoffs, recurring costs, and external dependencies. - With Air, you get full control, privacy, and zero marginal cost. - It enables new use cases where running speech models on-device matters (edge compute, accessibility tools, offline apps).

Repo: https://github.com/neuphonic/neutts-air

Would love feedback from HN on performance, applications, and contributions.