--- title: "MARS5-TTS vs dia" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/camb-ai-mars5-tts-vs-nari-labs-dia" tools: ["camb-ai-mars5-tts", "nari-labs-dia"] --- # MARS5-TTS vs dia *GraphCanon updated Sep 20, 2026* ## Verdict Pick MARS5-TTS if mARS5-TTS by CAMB.AI features advanced capabilities in text-to-speech synthesis with an emphasis on voice cloning and prosody control; 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. [MARS5-TTS](https://www.camb.ai) reports 2.8k GitHub stars, 246 forks, and 11 open issues, last pushed Aug 1, 2024. [dia](https://github.com/nari-labs/dia) has 19k stars, 1.7k forks, and 91 open issues, last pushed Nov 19, 2025. Figures are from public GitHub metadata via [MARS5-TTS's repository](https://github.com/Camb-ai/MARS5-TTS) and [dia's repository](https://github.com/nari-labs/dia). | | [MARS5-TTS](/tools/camb-ai-mars5-tts.md) | [dia](/tools/nari-labs-dia.md) | | --- | --- | --- | | Tagline | MARS5 speech model TTS from CAMB.AI | A TTS model for generating ultra-realistic dialogue | | Stars | 2,819 | 19,400 | | Forks | 246 | 1,690 | | Open issues | 11 | 91 | | 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. | Dia is an open-weight text-to-dialogue model providing full control over scripts and voices, ideal for generating ultra-realistic dialogue. | | 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) | [dia](/tools/nari-labs-dia.md) | | --- | --- | --- | | Maintenance | Dormant (18%) | Slowing (36%) | | Days since push | 779d | 304d | | Open issues (now) | 11 | 91 | | Stars delta | +3 (30d) | +39 (30d) | | Full report | [trust report](/tools/camb-ai-mars5-tts/trust.md) | [trust report](/tools/nari-labs-dia/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. ## Decision facts: dia - **Adopt for:** Dia is an open-weight text-to-dialogue model providing full control over scripts and voices, ideal for generating ultra-realistic dialogue. ## Choose when ### Choose MARS5-TTS if… - MARS5-TTS is primarily Jupyter Notebook; dia is Python. - License: MARS5-TTS is AGPL-3.0, dia 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 dia if… - dia is primarily Python; MARS5-TTS is Jupyter Notebook. - License: dia is Apache-2.0, MARS5-TTS is AGPL-3.0. - Tags unique to dia: dialogue-generation, tts. - When you require precise control over voice and script in the creation of highly realistic dialogues ## 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 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 ## Common questions ### What is the difference between MARS5-TTS and dia? MARS5-TTS: MARS5 speech model TTS from CAMB.AI. dia: A TTS model for generating ultra-realistic dialogue. See the comparison table for live GitHub stats and shared categories. ### When should I choose MARS5-TTS over dia? Choose MARS5-TTS over dia when MARS5-TTS is primarily Jupyter Notebook; dia is Python; License: MARS5-TTS is AGPL-3.0, dia 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 dia over MARS5-TTS? Choose dia over MARS5-TTS when dia is primarily Python; MARS5-TTS is Jupyter Notebook; License: dia is Apache-2.0, MARS5-TTS is AGPL-3.0; Tags unique to dia: dialogue-generation, tts; When you require precise control over voice and script in the creation of highly realistic dialogues. ### 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 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 MARS5-TTS or dia more popular on GitHub? dia has more GitHub stars (19,400 vs 2,819). Stars measure visibility, not whether either tool fits your constraints. ### Are MARS5-TTS and dia open source? Yes - both are open-source projects on GitHub (MARS5-TTS: AGPL-3.0, dia: Apache-2.0). ### Where can I find alternatives to MARS5-TTS or dia? GraphCanon lists graph-backed alternatives at [MARS5-TTS alternatives](/tools/camb-ai-mars5-tts/alternatives) and [dia alternatives](/tools/nari-labs-dia/alternatives) ([MARS5-TTS markdown twin](/tools/camb-ai-mars5-tts/alternatives.md), [dia markdown twin](/tools/nari-labs-dia/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-dia.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, MARS5-TTS or dia? MARS5-TTS: Dormant. 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 MARS5-TTS and dia? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [MARS5-TTS trust report](/tools/camb-ai-mars5-tts/trust); [dia trust report](/tools/nari-labs-dia/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/_