--- title: "espeak-ng vs RHVoice" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/espeak-ng-espeak-ng-vs-rhvoice-rhvoice" tools: ["espeak-ng-espeak-ng", "rhvoice-rhvoice"] --- # espeak-ng vs RHVoice *GraphCanon updated Sep 20, 2026* ## Verdict Pick espeak-ng if eSpeak NG: Free text-to-speech engine with over a hundred languages and accents in C under GPL-3.0; pick RHVoice if rHVoice is an open-source text-to-speech system developed for Russian and multiple other languages employing statistical parametric synthesis. [espeak-ng](https://github.com/espeak-ng/espeak-ng) reports 6.9k GitHub stars, 1.3k forks, and 620 open issues, last pushed Sep 14, 2026. [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 [espeak-ng's repository](https://github.com/espeak-ng/espeak-ng) and [RHVoice's repository](https://github.com/RHVoice/RHVoice). | | [espeak-ng](/tools/espeak-ng-espeak-ng.md) | [RHVoice](/tools/rhvoice-rhvoice.md) | | --- | --- | --- | | Tagline | Open source speech synthesizer supporting more than hundred languages and accents | a free and open source speech synthesizer for Russian and other languages | | Stars | 6,854 | 1,842 | | Forks | 1,297 | 270 | | Open issues | 620 | 171 | | Language | C | C++ | | Adopt for | eSpeak NG: Free text-to-speech engine with over a hundred languages and accents in C under GPL-3.0 | RHVoice is an open-source text-to-speech system developed for Russian and multiple other languages employing statistical parametric synthesis. | | Persona | - | - | | Runtime | - | - | | License | GPL-3.0 | GPL-2.0 | | Categories | Speech & Audio | Speech & Audio | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [espeak-ng](/tools/espeak-ng-espeak-ng.md) | [RHVoice](/tools/rhvoice-rhvoice.md) | | --- | --- | --- | | Maintenance | Very active (96%) | Active (82%) | | Days since push | 6d | 23d | | Open issues (now) | 620 | 171 | | Stars delta | +166 (30d) | +16 (30d) | | Open issues delta | +26 (30d) | +3 (30d) | | Full report | [trust report](/tools/espeak-ng-espeak-ng/trust.md) | [trust report](/tools/rhvoice-rhvoice/trust.md) | ## Decision facts: espeak-ng - **Adopt for:** eSpeak NG: Free text-to-speech engine with over a hundred languages and accents in C under GPL-3.0 ## 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 espeak-ng if… - espeak-ng is primarily C; RHVoice is C++. - License: espeak-ng is GPL-3.0, RHVoice is GPL-2.0. - Tags unique to espeak-ng: android, espeak, espeak-ng, speech-synthesis. - When multilingual support across over a hundred languages is required. ### Choose RHVoice if… - RHVoice is primarily C++; espeak-ng is C. - License: RHVoice is GPL-2.0, espeak-ng is GPL-3.0. - 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 espeak-ng - Avoid if proprietary software development prohibits use of GPL-3.0 licensed tools. - Not ideal if fine-grain control and quality over diverse accents are more important than extensive language coverage. ## 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 espeak-ng and RHVoice? espeak-ng: Open source speech synthesizer supporting more than hundred languages and accents. 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 espeak-ng over RHVoice? Choose espeak-ng over RHVoice when espeak-ng is primarily C; RHVoice is C++; License: espeak-ng is GPL-3.0, RHVoice is GPL-2.0; Tags unique to espeak-ng: android, espeak, espeak-ng, speech-synthesis; When multilingual support across over a hundred languages is required. ### When should I choose RHVoice over espeak-ng? Choose RHVoice over espeak-ng when RHVoice is primarily C++; espeak-ng is C; License: RHVoice is GPL-2.0, espeak-ng is GPL-3.0; 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 espeak-ng? Avoid if proprietary software development prohibits use of GPL-3.0 licensed tools. Not ideal if fine-grain control and quality over diverse accents are more important than extensive language coverage. ### 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 espeak-ng or RHVoice more popular on GitHub? espeak-ng has more GitHub stars (6,854 vs 1,842). Stars measure visibility, not whether either tool fits your constraints. ### Are espeak-ng and RHVoice open source? Yes - both are open-source projects on GitHub (espeak-ng: GPL-3.0, RHVoice: GPL-2.0). ### Where can I find alternatives to espeak-ng or RHVoice? GraphCanon lists graph-backed alternatives at [espeak-ng alternatives](/tools/espeak-ng-espeak-ng/alternatives) and [RHVoice alternatives](/tools/rhvoice-rhvoice/alternatives) ([espeak-ng markdown twin](/tools/espeak-ng-espeak-ng/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/espeak-ng-espeak-ng-vs-rhvoice-rhvoice.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, espeak-ng or RHVoice? espeak-ng: Very active. 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 espeak-ng and RHVoice? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [espeak-ng trust report](/tools/espeak-ng-espeak-ng/trust); [RHVoice trust report](/tools/rhvoice-rhvoice/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=espeak-ng-espeak-ng`](/api/graphcanon/graph?tool=espeak-ng-espeak-ng) - 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/_