Comparison
index-tts vs dia
Verdict
Pick index-tts if indexTTS is an industrial-level controllable zero-shot text-to-speech system that excels in duration control and emotionally expressive speech generation using autoregressive models; pick dia if dia is an open-weight text-to-dialogue model providing full control over scripts and voices, ideal for generating ultra-realistic dialogue.
Markdown twin · index-tts alternatives · dia alternatives
GraphCanon updated 3w
Trust & integrity
| Signal | index-tts | dia |
|---|---|---|
| Maintenance | Active (14d since push) As of 3w · github_public_v1 | Slowing (251d since push) As of 3w · github_public_v1 |
| Provenance | Not a fork · Personal account As of 3w · github_public_v1 | Not a fork · Organization account As of 3w · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of 1mo · osv@v1 | No lockfile (source not queried) As of 1mo · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- index-tts
- A Breakthrough in Emotionally Expressive and Duration-Controlled Auto-Regressive Zero-Shot Text-to-Speech
- dia
- A TTS model for generating ultra-realistic dialogue
Stars
- index-tts
- 22k
- dia
- 19k
Forks
- index-tts
- 2.7k
- dia
- 1.7k
Open issues
- index-tts
- 369
- dia
- 91
Language
- index-tts
- Python
- dia
- Python
Adopt for
- index-tts
- IndexTTS is an industrial-level controllable zero-shot text-to-speech system that excels in duration control and emotionally expressive speech generation using autoregressive models.
- dia
- Dia is an open-weight text-to-dialogue model providing full control over scripts and voices, ideal for generating ultra-realistic dialogue.
Persona
- index-tts
- -
- dia
- -
Runtime
- index-tts
- -
- dia
- -
License
- index-tts
- Other
- dia
- Apache-2.0
Last pushed
- index-tts
- Jul 14, 2026
- dia
- Nov 19, 2025
Categories
- index-tts
- Speech & Audio
- dia
- Speech & Audio
Trust and health
Maintenance
- index-tts
- Active (82%)
- dia
- Slowing (36%)
Days since push
- index-tts
- 14d
- dia
- 251d
Open issues (now)
- index-tts
- 369
- dia
- 91
Owner type
- index-tts
- User
- dia
- Organization
Full report
- index-tts
- Trust report
- dia
- Trust report
Choose index-tts if…
- License: index-tts is Other, dia is Apache-2.0.
- Tags unique to index-tts: bigvgan, cross-lingual, indextts, voice-clone.
- Use IndexTTS when precise speech duration control is required, such as for professional video dubbing projects where audio-visual synchronization needs to be exact.
When NOT to use index-tts
- Avoid using IndexTTS in scenarios where minimal latency is critical, as its autoregressive generation mode may introduce processing delays compared to non-autoregressive methods.
- Do not use if you require support for a wide variety of languages beyond what the system's zero-shot capabilities cover.
Choose dia if…
- License: dia is Apache-2.0, index-tts is Other.
- Tags unique to dia: dialogue-generation.
- When you require precise control over voice and script in the creation of highly realistic dialogues
When NOT to use dia
- If your setup lacks a GPU, as Dia has not yet added CPU support
- In scenarios where immediate real-time performance is critical since the first run could be longer due to additional codec downloads
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (index-tts/index-tts) · observed Jul 29, 2026
- GitHub forks (index-tts/index-tts) · observed Jul 29, 2026
- Last push (index-tts/index-tts) · observed Jul 14, 2026
- License file (Other) · observed Jul 29, 2026
- Decision facts (enrichment) · observed Jul 16, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (nari-labs/dia) · observed Jul 29, 2026
- GitHub forks (nari-labs/dia) · observed Jul 29, 2026
- Last push (nari-labs/dia) · observed Nov 19, 2025
- License file (Apache-2.0) · observed Jul 29, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: index-tts 22k · dia 19k (synced Jul 29, 2026).
Common questions
- What is the difference between index-tts and dia?
- index-tts: A Breakthrough in Emotionally Expressive and Duration-Controlled Auto-Regressive Zero-Shot Text-to-Speech. dia: A TTS model for generating ultra-realistic dialogue. See the comparison table for live GitHub stats and shared categories.
- When should I choose index-tts over dia?
- Choose index-tts over dia when License: index-tts is Other, dia is Apache-2.0; Tags unique to index-tts: bigvgan, cross-lingual, indextts, voice-clone; Use IndexTTS when precise speech duration control is required, such as for professional video dubbing projects where audio-visual synchronization needs to be exact.
- When should I choose dia over index-tts?
- Choose dia over index-tts when License: dia is Apache-2.0, index-tts is Other; Tags unique to dia: dialogue-generation; When you require precise control over voice and script in the creation of highly realistic dialogues.
- When should I avoid index-tts?
- Avoid using IndexTTS in scenarios where minimal latency is critical, as its autoregressive generation mode may introduce processing delays compared to non-autoregressive methods. Do not use if you require support for a wide variety of languages beyond what the system's zero-shot capabilities cover.
- When should I avoid dia?
- If your setup lacks a GPU, as Dia has not yet added CPU support In scenarios where immediate real-time performance is critical since the first run could be longer due to additional codec downloads
- Is index-tts or dia more popular on GitHub?
- index-tts has more GitHub stars (22,239 vs 19,361). Stars measure visibility, not whether either tool fits your constraints.
- Are index-tts and dia open source?
- Yes - both are open-source projects on GitHub (index-tts: Other, dia: Apache-2.0).
- Where can I find alternatives to index-tts or dia?
- GraphCanon lists graph-backed alternatives at index-tts alternatives and dia alternatives (index-tts markdown twin, dia markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, index-tts or dia?
- index-tts: Active. dia: Slowing. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for index-tts and dia?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: index-tts trust report; dia trust report.