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SoTA open-source TTS
⭐ Very popular: 26k stars, gaining about 83 a week
View on GitHub ↗repo profile
momentum
durability
bus factor = how many people it takes to cover more than half the commits (6 months). 1 is a solo project; higher means the work is spread across a team. top-author share is the single busiest author's slice of those commits.
since we covered it
why it's a big deal
- Democratizes access to high-quality, production-grade TTS without vendor lock-in.
- Enables creative and interactive use cases with unique emotion control.
- Benchmarked against closed-source leaders and consistently preferred in evaluations.
under the hood
- 0.5B Llama-based model trained on 0.5m hours of curated data; MIT-licensed.
- Alignment-informed inference for stability, sub-200ms latency, and voice conversion scripts.
- Built-in imperceptible watermarking (PerTh) ensures responsible AI audio generation.
our take from PR#16, 2025-09-03
star history
- PR#16 11k 2025-09-03
- now 26k + 15k since first covered
curve is sampled from GitHub's star history, plus our own daily readings since we covered it; the dashed stretch is before we first covered it, the solid line since. figures at coverage are the numbers we printed then (approx.), current count is live.
understory
Better known than its recent output, coasting a little on attention.
- output, commits & releases
- clout, star velocity
output = commits & releases; clout = star velocity, both 0 to 100 monthly indices; the gap where output runs above clout is the understory. The understory →
covered in
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Open Source TTS with Emotion Control
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