--- title: "dia vs RHVoice" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/nari-labs-dia-vs-rhvoice-rhvoice" tools: ["nari-labs-dia", "rhvoice-rhvoice"] --- # dia vs RHVoice *GraphCanon updated Sep 20, 2026* ## Verdict 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; pick RHVoice if rHVoice is an open-source text-to-speech system developed for Russian and multiple other languages employing statistical parametric synthesis. [dia](https://github.com/nari-labs/dia) reports 19k GitHub stars, 1.7k forks, and 91 open issues, last pushed Nov 19, 2025. [RHVoice](https://rhvoice.org) has 1.8k stars, 270 forks, and 171 open issues, last pushed Aug 27, 2026. Figures are from public GitHub metadata via [dia's repository](https://github.com/nari-labs/dia) and [RHVoice's repository](https://github.com/RHVoice/RHVoice). | | [dia](/tools/nari-labs-dia.md) | [RHVoice](/tools/rhvoice-rhvoice.md) | | --- | --- | --- | | Tagline | A TTS model for generating ultra-realistic dialogue | a free and open source speech synthesizer for Russian and other languages | | Stars | 19,400 | 1,842 | | Forks | 1,690 | 270 | | Open issues | 91 | 171 | | Language | Python | C++ | | Adopt for | Dia is an open-weight text-to-dialogue model providing full control over scripts and voices, ideal for generating ultra-realistic dialogue. | RHVoice is an open-source text-to-speech system developed for Russian and multiple other languages employing statistical parametric synthesis. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | GPL-2.0 | | Categories | Speech & Audio | Speech & Audio | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [dia](/tools/nari-labs-dia.md) | [RHVoice](/tools/rhvoice-rhvoice.md) | | --- | --- | --- | | Maintenance | Slowing (36%) | Active (82%) | | Days since push | 304d | 23d | | Open issues (now) | 91 | 171 | | Stars delta | +39 (30d) | +16 (30d) | | Open issues delta | 0 (30d) | +3 (30d) | | Full report | [trust report](/tools/nari-labs-dia/trust.md) | [trust report](/tools/rhvoice-rhvoice/trust.md) | ## 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. ## Decision facts: RHVoice - **Adopt for:** RHVoice is an open-source text-to-speech system developed for Russian and multiple other languages employing statistical parametric synthesis. ## Choose when ### Choose dia if… - dia is primarily Python; RHVoice is C++. - License: dia is Apache-2.0, RHVoice is GPL-2.0. - Tags unique to dia: dialogue-generation, text-to-speech, tts. - When you require precise control over voice and script in the creation of highly realistic dialogues ### Choose RHVoice if… - RHVoice is primarily C++; dia is Python. - License: RHVoice is GPL-2.0, dia is Apache-2.0. - Tags unique to RHVoice: brazilian portuguese, english, esperanto, georgian. - - When you need support for less commonly supported languages such as Kyrgyz, Tatar, or Albanian. ## 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 ## When NOT to use RHVoice - - Avoid if seeking support exclusively for widely used languages like Spanish or Mandarin, where other options may offer more resources and community support. - - Not ideal in scenarios where the naturalness of speech synthesis is critical over intelligibility and memory efficiency. ## Common questions ### What is the difference between dia and RHVoice? dia: A TTS model for generating ultra-realistic dialogue. RHVoice: a free and open source speech synthesizer for Russian and other languages. See the comparison table for live GitHub stats and shared categories. ### When should I choose dia over RHVoice? Choose dia over RHVoice when dia is primarily Python; RHVoice is C++; License: dia is Apache-2.0, RHVoice is GPL-2.0; Tags unique to dia: dialogue-generation, text-to-speech, tts; When you require precise control over voice and script in the creation of highly realistic dialogues. ### When should I choose RHVoice over dia? Choose RHVoice over dia when RHVoice is primarily C++; dia is Python; License: RHVoice is GPL-2.0, dia is Apache-2.0; Tags unique to RHVoice: brazilian portuguese, english, esperanto, georgian; - When you need support for less commonly supported languages such as Kyrgyz, Tatar, or Albanian. ### 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 ### When should I avoid RHVoice? - Avoid if seeking support exclusively for widely used languages like Spanish or Mandarin, where other options may offer more resources and community support. - Not ideal in scenarios where the naturalness of speech synthesis is critical over intelligibility and memory efficiency. ### Is dia or RHVoice more popular on GitHub? dia has more GitHub stars (19,400 vs 1,842). Stars measure visibility, not whether either tool fits your constraints. ### Are dia and RHVoice open source? Yes - both are open-source projects on GitHub (dia: Apache-2.0, RHVoice: GPL-2.0). ### Where can I find alternatives to dia or RHVoice? GraphCanon lists graph-backed alternatives at [dia alternatives](/tools/nari-labs-dia/alternatives) and [RHVoice alternatives](/tools/rhvoice-rhvoice/alternatives) ([dia markdown twin](/tools/nari-labs-dia/alternatives.md), [RHVoice markdown twin](/tools/rhvoice-rhvoice/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/nari-labs-dia-vs-rhvoice-rhvoice.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, dia or RHVoice? dia: Slowing. RHVoice: Active. 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 dia and RHVoice? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [dia trust report](/tools/nari-labs-dia/trust); [RHVoice trust report](/tools/rhvoice-rhvoice/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=nari-labs-dia`](/api/graphcanon/graph?tool=nari-labs-dia) - 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/_