--- title: "MARS5-TTS vs dia2" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/camb-ai-mars5-tts-vs-nari-labs-dia2" tools: ["camb-ai-mars5-tts", "nari-labs-dia2"] --- # MARS5-TTS vs dia2 *GraphCanon updated Sep 20, 2026* ## Verdict Pick MARS5-TTS when mARS5-TTS is primarily Jupyter Notebook; dia2 is Python; pick dia2 when dia2 is primarily Python; MARS5-TTS is Jupyter Notebook. [MARS5-TTS](https://www.camb.ai) reports 2.8k GitHub stars, 246 forks, and 11 open issues, last pushed Aug 1, 2024. [dia2](https://github.com/nari-labs/dia2) has 1.2k stars, 102 forks, and 5 open issues, last pushed Nov 29, 2025. Figures are from public GitHub metadata via [MARS5-TTS's repository](https://github.com/Camb-ai/MARS5-TTS) and [dia2's repository](https://github.com/nari-labs/dia2). | | [MARS5-TTS](/tools/camb-ai-mars5-tts.md) | [dia2](/tools/nari-labs-dia2.md) | | --- | --- | --- | | Tagline | MARS5 speech model TTS from CAMB.AI | TTS model capable of streaming conversational audio in real-time. | | Stars | 2,819 | 1,180 | | Forks | 246 | 102 | | Open issues | 11 | 5 | | Language | Jupyter Notebook | Python | | Adopt for | MARS5-TTS by CAMB.AI features advanced capabilities in text-to-speech synthesis with an emphasis on voice cloning and prosody control. | - | | Persona | - | - | | Runtime | - | - | | License | The tool is licensed under AGPL-3.0, an open-source license that requires any modifications or derivatives to also be shared under the same terms. | Apache-2.0 | | Categories | Speech & Audio | Speech & Audio | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [MARS5-TTS](/tools/camb-ai-mars5-tts.md) | [dia2](/tools/nari-labs-dia2.md) | | --- | --- | --- | | Maintenance | Dormant (18%) | Slowing (36%) | | Days since push | 779d | 295d | | Open issues (now) | 11 | 5 | | Stars delta | +3 (30d) | +20 (30d) | | Full report | [trust report](/tools/camb-ai-mars5-tts/trust.md) | [trust report](/tools/nari-labs-dia2/trust.md) | ## Decision facts: MARS5-TTS - **Pricing:** freemium - Open-source version is free for non-commercial use; commercial licenses are available upon request by contacting help@camb.ai. - **Requirements:** Supports custom development through Docker, allowing you to build a base image and extend with your own inference scripts.; Docker integration provides flexibility but requires users to have the necessary environment setup for usage. - **Adopt for:** MARS5-TTS by CAMB.AI features advanced capabilities in text-to-speech synthesis with an emphasis on voice cloning and prosody control. - **License detail:** The tool is licensed under AGPL-3.0, an open-source license that requires any modifications or derivatives to also be shared under the same terms. ## Choose when ### Choose MARS5-TTS if… - MARS5-TTS is primarily Jupyter Notebook; dia2 is Python. - License: MARS5-TTS is AGPL-3.0, dia2 is Apache-2.0. - Pricing: Open-source version is free for non-commercial use; commercial licenses are available upon request by contacting help@camb.ai.. - Requirements: Supports custom development through Docker, allowing you to build a base image and extend with your own inference scripts.; Docker integration provides flexibility but requires users to have the necessary environment setup for usage.. - Tags unique to MARS5-TTS: docker-support, jupyter-notebook, prosody, speech-synthesis. - When you have projects requiring nuanced prosody control for more natural sounding synthesized speech, as MARS5-TTS is specifically highlighted for its prosodic synthesis abilities. ### Choose dia2 if… - dia2 is primarily Python; MARS5-TTS is Jupyter Notebook. - License: dia2 is Apache-2.0, MARS5-TTS is AGPL-3.0. - Tags unique to dia2: open-weight. - When you need real-time streaming capabilities for text-to-speech applications. ## When NOT to use MARS5-TTS - When you require immediate access to pre-built output-generating Docker images, since as of now these are not yet available despite plans for their future addition. - If your project needs a model that does not involve the GNU AGPL-3.0 license, because this might impose restrictions on how derivative works can be distributed. ## 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. ## Common questions ### What is the difference between MARS5-TTS and dia2? MARS5-TTS: MARS5 speech model TTS from CAMB.AI. 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 MARS5-TTS over dia2? Choose MARS5-TTS over dia2 when MARS5-TTS is primarily Jupyter Notebook; dia2 is Python; License: MARS5-TTS is AGPL-3.0, dia2 is Apache-2.0; Pricing: Open-source version is free for non-commercial use; commercial licenses are available upon request by contacting help@camb.ai.; Requirements: Supports custom development through Docker, allowing you to build a base image and extend with your own inference scripts.; Docker integration provides flexibility but requires users to have the necessary environment setup for usage.; Tags unique to MARS5-TTS: docker-support, jupyter-notebook, prosody, speech-synthesis; When you have projects requiring nuanced prosody control for more natural sounding synthesized speech, as MARS5-TTS is specifically highlighted for its prosodic synthesis abilities. ### When should I choose dia2 over MARS5-TTS? Choose dia2 over MARS5-TTS when dia2 is primarily Python; MARS5-TTS is Jupyter Notebook; License: dia2 is Apache-2.0, MARS5-TTS is AGPL-3.0; Tags unique to dia2: open-weight; When you need real-time streaming capabilities for text-to-speech applications. ### When should I avoid MARS5-TTS? When you require immediate access to pre-built output-generating Docker images, since as of now these are not yet available despite plans for their future addition. If your project needs a model that does not involve the GNU AGPL-3.0 license, because this might impose restrictions on how derivative works can be distributed. ### 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 MARS5-TTS or dia2 more popular on GitHub? MARS5-TTS has more GitHub stars (2,819 vs 1,180). Stars measure visibility, not whether either tool fits your constraints. ### Are MARS5-TTS and dia2 open source? Yes - both are open-source projects on GitHub (MARS5-TTS: AGPL-3.0, dia2: Apache-2.0). ### Where can I find alternatives to MARS5-TTS or dia2? GraphCanon lists graph-backed alternatives at [MARS5-TTS alternatives](/tools/camb-ai-mars5-tts/alternatives) and [dia2 alternatives](/tools/nari-labs-dia2/alternatives) ([MARS5-TTS markdown twin](/tools/camb-ai-mars5-tts/alternatives.md), [dia2 markdown twin](/tools/nari-labs-dia2/alternatives.md)), 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](/compare/camb-ai-mars5-tts-vs-nari-labs-dia2.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, MARS5-TTS or dia2? MARS5-TTS: Dormant. 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 MARS5-TTS and dia2? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [MARS5-TTS trust report](/tools/camb-ai-mars5-tts/trust); [dia2 trust report](/tools/nari-labs-dia2/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=camb-ai-mars5-tts`](/api/graphcanon/graph?tool=camb-ai-mars5-tts) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_