Comparison
index-tts vs dia2
Verdict
Pick index-tts when license: index-tts is Other, dia2 is Apache-2.0; pick dia2 when license: dia2 is Apache-2.0, index-tts is Other.
Markdown twin · index-tts alternatives · dia2 alternatives
GraphCanon updated 3w
Trust & integrity
| Signal | index-tts | dia2 |
|---|---|---|
| Maintenance | Active (14d since push) As of 3w · github_public_v1 | Slowing (243d 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
- dia2
- TTS model capable of streaming conversational audio in real-time.
Stars
- index-tts
- 22k
- dia2
- 1.2k
Forks
- index-tts
- 2.7k
- dia2
- 99
Open issues
- index-tts
- 369
- dia2
- 5
Language
- index-tts
- Python
- dia2
- 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.
- dia2
- -
Persona
- index-tts
- -
- dia2
- -
Runtime
- index-tts
- -
- dia2
- -
License
- index-tts
- Other
- dia2
- Apache-2.0
Last pushed
- index-tts
- Jul 14, 2026
- dia2
- Nov 29, 2025
Categories
- index-tts
- Speech & Audio
- dia2
- Speech & Audio
Trust and health
Maintenance
- index-tts
- Active (82%)
- dia2
- Slowing (36%)
Days since push
- index-tts
- 14d
- dia2
- 243d
Open issues (now)
- index-tts
- 369
- dia2
- 5
Owner type
- index-tts
- User
- dia2
- Organization
Full report
- index-tts
- Trust report
- dia2
- Trust report
Choose index-tts if…
- License: index-tts is Other, dia2 is Apache-2.0.
- Tags unique to index-tts: bigvgan, cross-lingual, indextts, tts.
- 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 dia2 if…
- License: dia2 is Apache-2.0, index-tts is Other.
- Tags unique to dia2: open-weight.
- When you need real-time streaming capabilities for text-to-speech applications.
When NOT to use dia2
- For projects aimed at batch processing or non-realtime TTS applications where instantaneous audio output isn't required.
- If you are looking for an open-source model that does not include specific proprietary components like the Kyutai Mimi codec.
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/dia2) · observed Jul 30, 2026
- GitHub forks (nari-labs/dia2) · observed Jul 30, 2026
- Last push (nari-labs/dia2) · observed Nov 29, 2025
- License file (Apache-2.0) · observed Jul 30, 2026
- Decision facts (enrichment) · observed Jul 12, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: index-tts 22k · dia2 1.2k (synced Jul 29, 2026).
Common questions
- What is the difference between index-tts and dia2?
- index-tts: A Breakthrough in Emotionally Expressive and Duration-Controlled Auto-Regressive Zero-Shot Text-to-Speech. dia2: TTS model capable of streaming conversational audio in real-time.. See the comparison table for live GitHub stats and shared categories.
- When should I choose index-tts over dia2?
- Choose index-tts over dia2 when License: index-tts is Other, dia2 is Apache-2.0; Tags unique to index-tts: bigvgan, cross-lingual, indextts, tts; 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 dia2 over index-tts?
- Choose dia2 over index-tts when License: dia2 is Apache-2.0, index-tts is Other; Tags unique to dia2: open-weight; When you need real-time streaming capabilities for text-to-speech applications.
- 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 dia2?
- For projects aimed at batch processing or non-realtime TTS applications where instantaneous audio output isn't required. If you are looking for an open-source model that does not include specific proprietary components like the Kyutai Mimi codec.
- Is index-tts or dia2 more popular on GitHub?
- index-tts has more GitHub stars (22,239 vs 1,160). Stars measure visibility, not whether either tool fits your constraints.
- Are index-tts and dia2 open source?
- Yes - both are open-source projects on GitHub (index-tts: Other, dia2: Apache-2.0).
- Where can I find alternatives to index-tts or dia2?
- GraphCanon lists graph-backed alternatives at index-tts alternatives and dia2 alternatives (index-tts markdown twin, dia2 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 dia2?
- index-tts: Active. dia2: 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 dia2?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: index-tts trust report; dia2 trust report.