Comparison
index-tts vs chatterbox-tts-api
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 chatterbox-tts-api if chatterbox-TTS-API is a locally hosted Python-based text-to-speech API with capabilities similar to ElevenLabs, offering an OpenAI-compatible interface for generating voice-cloned speech.
Markdown twin · index-tts alternatives · chatterbox-tts-api alternatives
GraphCanon updated 1w
vs
Trust & integrity
| Signal | index-tts | chatterbox-tts-api |
|---|---|---|
| Maintenance | Active (14d since push) As of 3w · github_public_v1 | Slowing (232d since push) As of 1w · github_public_v1 |
| Provenance | Not a fork · Personal account As of 3w · github_public_v1 | Not a fork · Personal account As of 1w · 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
- chatterbox-tts-api
- Local OpenAI-compatible text-to-speech API using Chatterbox
Stars
- index-tts
- 22k
- chatterbox-tts-api
- 666
Forks
- index-tts
- 2.7k
- chatterbox-tts-api
- 152
Open issues
- index-tts
- 369
- chatterbox-tts-api
- 16
Language
- index-tts
- Python
- chatterbox-tts-api
- 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.
- chatterbox-tts-api
- Chatterbox-TTS-API is a locally hosted Python-based text-to-speech API with capabilities similar to ElevenLabs, offering an OpenAI-compatible interface for generating voice-cloned speech.
Persona
- index-tts
- -
- chatterbox-tts-api
- -
Runtime
- index-tts
- -
- chatterbox-tts-api
- -
License
- index-tts
- Other
- chatterbox-tts-api
- Chatterbox-TTS-API is distributed under the AGPL-3.0 license, ensuring any modifications or derivative works must be shared openly.
Last pushed
- index-tts
- Jul 14, 2026
- chatterbox-tts-api
- Dec 23, 2025
Categories
- index-tts
- Speech & Audio
- chatterbox-tts-api
- Speech & Audio
Trust and health
Maintenance
- index-tts
- Active (82%)
- chatterbox-tts-api
- Slowing (36%)
Days since push
- index-tts
- 14d
- chatterbox-tts-api
- 232d
Open issues (now)
- index-tts
- 369
- chatterbox-tts-api
- 16
Full report
- index-tts
- Trust report
- chatterbox-tts-api
- Trust report
Choose index-tts if…
- License: index-tts is Other, chatterbox-tts-api is AGPL-3.0.
- Tags unique to index-tts: bigvgan, cross-lingual, indextts, text-to-speech.
- 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 chatterbox-tts-api if…
- License: chatterbox-tts-api is AGPL-3.0, index-tts is Other.
- Requirements: Requires a local setup environment that supports CUDA for optimal performance; Docker can simplify deployment..
- Tags unique to chatterbox-tts-api: ai, chatgpt, chatterbox, cuda.
- When you need a self-hosted solution that mirrors the functionality of ElevenLabs or other proprietary TTS services and requires compatibility with existing ecosystems like Open WebUI or AnythingLLM.
When NOT to use chatterbox-tts-api
- If you require integrations specific to ElevenLabs' proprietary voice models as Chatterbox-TTS-API, despite its capabilities, does not directly support their unique voice libraries.
- For users needing a fully managed service without the complexities of local deployment and maintenance, like that offered by cloud-based TTS providers.
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 (travisvn/chatterbox-tts-api) · observed Aug 13, 2026
- GitHub forks (travisvn/chatterbox-tts-api) · observed Aug 13, 2026
- Last push (travisvn/chatterbox-tts-api) · observed Dec 23, 2025
- License file (AGPL-3.0) · observed Aug 13, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 15, 2026
GitHub stars on cards: index-tts 22k · chatterbox-tts-api 666 (synced Jul 29, 2026).
Common questions
- What is the difference between index-tts and chatterbox-tts-api?
- index-tts: A Breakthrough in Emotionally Expressive and Duration-Controlled Auto-Regressive Zero-Shot Text-to-Speech. chatterbox-tts-api: Local OpenAI-compatible text-to-speech API using Chatterbox. See the comparison table for live GitHub stats and shared categories.
- When should I choose index-tts over chatterbox-tts-api?
- Choose index-tts over chatterbox-tts-api when License: index-tts is Other, chatterbox-tts-api is AGPL-3.0; Tags unique to index-tts: bigvgan, cross-lingual, indextts, text-to-speech; 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 chatterbox-tts-api over index-tts?
- Choose chatterbox-tts-api over index-tts when License: chatterbox-tts-api is AGPL-3.0, index-tts is Other; Requirements: Requires a local setup environment that supports CUDA for optimal performance; Docker can simplify deployment.; Tags unique to chatterbox-tts-api: ai, chatgpt, chatterbox, cuda; When you need a self-hosted solution that mirrors the functionality of ElevenLabs or other proprietary TTS services and requires compatibility with existing ecosystems like Open WebUI or AnythingLLM.
- 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 chatterbox-tts-api?
- If you require integrations specific to ElevenLabs' proprietary voice models as Chatterbox-TTS-API, despite its capabilities, does not directly support their unique voice libraries. For users needing a fully managed service without the complexities of local deployment and maintenance, like that offered by cloud-based TTS providers.
- Is index-tts or chatterbox-tts-api more popular on GitHub?
- index-tts has more GitHub stars (22,239 vs 666). Stars measure visibility, not whether either tool fits your constraints.
- Are index-tts and chatterbox-tts-api open source?
- Yes - both are open-source projects on GitHub (index-tts: Other, chatterbox-tts-api: AGPL-3.0).
- Where can I find alternatives to index-tts or chatterbox-tts-api?
- GraphCanon lists graph-backed alternatives at index-tts alternatives and chatterbox-tts-api alternatives (index-tts markdown twin, chatterbox-tts-api 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 chatterbox-tts-api?
- index-tts: Active. chatterbox-tts-api: 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 chatterbox-tts-api?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: index-tts trust report; chatterbox-tts-api trust report.