Dia
A TTS model capable of generating ultra-realistic dialogue in one pass.
Our verdict
A notable project that carries real maintenance risk. This assessment is derived from GitHub's own repository metrics on 2026-08-30, not from hands-on testing.
A TTS model capable of generating ultra-realistic dialogue in one pass. The project is written primarily in Python, released under Apache-2.0, and has 19,385 stars and 1,690 forks on GitHub. 21 contributors have committed to it, and the most recent push was 2025-11-19. The maintainers do not publish tagged releases, so version pinning relies on commits. Figures come from the GitHub API on 2026-08-30 and are refreshed daily; the score below weighs adoption, maintenance, release discipline, contributor breadth, licence clarity and issue hygiene.
Repository
- Licence
- Apache-2.0
- Language
- Python
- Last push
- 2025-11-19
Pros and cons
Pros
Cons
Pricing
- Free tierYes
- LicenceApache-2.0
- Self-hostYes, source is public
- Public price listNot published
Dia does not publish a web price list. For consumer apps that usually means pricing appears inside the product; for enterprise tools it means talking to sales. Why we do this
Visit github.comWhat users actually say
- N/A Reddit · N/A
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User reviews
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Dia alternatives
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Side by side
| Tool | Our score | From | Free tier | Best for | |
|---|---|---|---|---|---|
| Dia this page | 4.2 | - | Yes | ||
| ElevenLabs | 8.5 | $6 | Yes | Creators publishing in several languages, developers who need… | |
| GPT-SoVITS | 6.2 | - | Yes | ||
| index-tts | 5.8 | - | Yes | ||
| ChatTTS | 5.5 | - | Yes | ||
| Descript | 5.5 | $16 | Yes | ||
| Krisp | 5.2 | $8 | - |
Questions
Is dia free?
Yes. dia advertises a free tier on its own site.
How much does dia cost?
dia does not publish a web price list. For consumer apps that usually means pricing appears inside the product; for enterprise tools it means talking to sales.
Is dia open source?
Yes. dia is a public repository released under Apache-2.0. You can self-host or inspect the source directly.
How is dia scored here?
dia scores 4.2 out of 10. That comes from a desk review of public evidence, which is capped at 8.5 out of 10: public pricing, documentation, maintenance signals and how much we could actually verify. Affiliate relationships are excluded from scoring entirely. The full rubric is published on our methodology page.