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Comparison

ChatTTS vs dia2

Verdict

Pick ChatTTS when license: ChatTTS is AGPL-3.0, dia2 is Apache-2.0; pick dia2 when license: dia2 is Apache-2.0, ChatTTS is AGPL-3.0.

Markdown twin · ChatTTS alternatives · dia2 alternatives

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ChatTTS logo

ChatTTS

2noise/ChatTTS

★ 40kpushed Apr 10, 2026
vs
dia2 logo

dia2

nari-labs/dia2

★ 1.2kpushed Nov 29, 2025

Trust & integrity

SignalChatTTSdia2
Maintenance
Slowing (91d since push)
As of 1d · github_public_v1
Slowing (224d since push)
As of today · github_public_v1
Provenance
Not a fork · Organization account
As of 1d · github_public_v1
Not a fork · Organization account
As of today · github_public_v1
Security (OSV)
No lockfile
As of 1d · none
No lockfile
As of today · none
ChatTTS trust reportdia2 trust reportTrust methodology

Tagline

ChatTTS
A generative speech model for daily dialogue
dia2
TTS model capable of streaming conversational audio in realtime.

Stars

ChatTTS
40k
dia2
1.2k

Forks

ChatTTS
4.2k
dia2
99

Open issues

ChatTTS
63
dia2
5

Language

ChatTTS
Python
dia2
Python

Adopt for

ChatTTS
ChatTTS is a Python-based repository for generating speech tailored to everyday conversations in both Chinese and English.
dia2
-

Persona

ChatTTS
-
dia2
-

Runtime

ChatTTS
-
dia2
-

License

ChatTTS
Licensed under AGPL-3.0, which allows for free use, distribution, and modification as long as these rights are maintained in derivative works.
dia2
Apache-2.0

Last pushed

ChatTTS
Apr 10, 2026
dia2
Nov 29, 2025

Categories

ChatTTS
AI Agents, Speech & Audio
dia2
Speech & Audio

Trust and health

Days since push

ChatTTS
91d
dia2
224d

Open issues (now)

ChatTTS
63
dia2
5

Full report

ChatTTS
Trust report
dia2
Trust report

Choose ChatTTS if…

  • License: ChatTTS is AGPL-3.0, dia2 is Apache-2.0.
  • Requirements: Python-based implementation means that familiarity with Python is necessary for effective use..
  • Tags unique to ChatTTS: agent, chatgpt, chattts, chinese-language.
  • Also covers AI Agents.
  • Use ChatTTS when you require text-to-speech functionality for daily dialogue applications, especially those involving Chinese or English languages.

When NOT to use ChatTTS

  • Avoid using ChatTTS in environments where the speech generation model is expected to handle complex technical jargon or specialized vocabulary, as it's optimized for daily conversation.
  • Do not use ChatTTS if your project requires the integration of more than two languages simultaneously due to its current support for only Chinese and English.
GitHubDetails

Choose dia2 if…

  • License: dia2 is Apache-2.0, ChatTTS is AGPL-3.0.
  • Tags unique to dia2: open-weight, python, text-to-speech.
  • Leaner open-issue backlog (5).

When NOT to use dia2

  • Last GitHub push was 225 days ago (slowing maintenance, Nov 29, 2025). Validate activity before betting a new project on dia2.
GitHubDetails

Explore

ChatTTS trust report →dia2 trust report →AI Agents category →Speech & Audio category →All comparisonsStack workflowsTrending tools

Sources

Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.

GitHub stars on cards: ChatTTS 40k · dia2 1.2k (synced Jul 11, 2026).

Common questions

What is the difference between ChatTTS and dia2?
ChatTTS: A generative speech model for daily dialogue. dia2: TTS model capable of streaming conversational audio in realtime.. See the comparison table for live GitHub stats and shared categories.
When should I choose ChatTTS over dia2?
Choose ChatTTS over dia2 when License: ChatTTS is AGPL-3.0, dia2 is Apache-2.0; Requirements: Python-based implementation means that familiarity with Python is necessary for effective use.; Tags unique to ChatTTS: agent, chatgpt, chattts, chinese-language; Also covers AI Agents; Use ChatTTS when you require text-to-speech functionality for daily dialogue applications, especially those involving Chinese or English languages.
When should I choose dia2 over ChatTTS?
Choose dia2 over ChatTTS when License: dia2 is Apache-2.0, ChatTTS is AGPL-3.0; Tags unique to dia2: open-weight, python, text-to-speech; Leaner open-issue backlog (5).
When should I avoid ChatTTS?
Avoid using ChatTTS in environments where the speech generation model is expected to handle complex technical jargon or specialized vocabulary, as it's optimized for daily conversation. Do not use ChatTTS if your project requires the integration of more than two languages simultaneously due to its current support for only Chinese and English.
When should I avoid dia2?
Last GitHub push was 225 days ago (slowing maintenance, Nov 29, 2025). Validate activity before betting a new project on dia2.
Is ChatTTS or dia2 more popular on GitHub?
ChatTTS has more GitHub stars (39,593 vs 1,154). Stars measure visibility, not whether either tool fits your constraints.
Are ChatTTS and dia2 open source?
Yes - both are open-source projects on GitHub (ChatTTS: AGPL-3.0, dia2: Apache-2.0).
Where can I find alternatives to ChatTTS or dia2?
GraphCanon lists graph-backed alternatives at ChatTTS alternatives and dia2 alternatives (ChatTTS 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, ChatTTS or dia2?
ChatTTS: Slowing. 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 ChatTTS and dia2?
GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: ChatTTS trust report; dia2 trust report.