--- title: "espeak-ng vs metavoice-src" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/espeak-ng-espeak-ng-vs-metavoiceio-metavoice-src" tools: ["espeak-ng-espeak-ng", "metavoiceio-metavoice-src"] --- # espeak-ng vs metavoice-src *GraphCanon updated Jul 29, 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 metavoice-src if metavoice-src is an AI-driven repository focused on producing human-like expressive text-to-speech (TTS) systems using deep learning and PyTorch, with specific requirements such as minimum 12GB GPU VRAM. [espeak-ng](https://github.com/espeak-ng/espeak-ng) reports 6.7k GitHub stars, 1.3k forks, and 594 open issues, last pushed Jul 27, 2026. [metavoice-src](https://themetavoice.xyz/) has 4.2k stars, 693 forks, and 64 open issues, last pushed Jul 30, 2024. Figures are from public GitHub metadata via [espeak-ng's repository](https://github.com/espeak-ng/espeak-ng) and [metavoice-src's repository](https://github.com/metavoiceio/metavoice-src). | | [espeak-ng](/tools/espeak-ng-espeak-ng.md) | [metavoice-src](/tools/metavoiceio-metavoice-src.md) | | --- | --- | --- | | Tagline | Open source speech synthesizer supporting more than hundred languages and accents | Foundational model for human-like, expressive TTS | | Stars | 6,688 | 4,203 | | Forks | 1,263 | 693 | | Open issues | 594 | 64 | | Language | C | Python | | Adopt for | eSpeak NG: Free text-to-speech engine with over a hundred languages and accents in C under GPL-3.0 | Metavoice-src is an AI-driven repository focused on producing human-like expressive text-to-speech (TTS) systems using deep learning and PyTorch, with specific requirements such as minimum 12GB GPU VRAM. | | Persona | - | - | | Runtime | - | - | | License | GPL-3.0 | Apache-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) | [metavoice-src](/tools/metavoiceio-metavoice-src.md) | | --- | --- | --- | | Maintenance | Very active (96%) | Dormant (18%) | | Days since push | 1d | 728d | | Open issues (now) | 594 | 64 | | Full report | [trust report](/tools/espeak-ng-espeak-ng/trust.md) | [trust report](/tools/metavoiceio-metavoice-src/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: metavoice-src - **Adopt for:** Metavoice-src is an AI-driven repository focused on producing human-like expressive text-to-speech (TTS) systems using deep learning and PyTorch, with specific requirements such as minimum 12GB GPU VRAM. ## Choose when ### Choose espeak-ng if… - espeak-ng is primarily C; metavoice-src is Python. - License: espeak-ng is GPL-3.0, metavoice-src is Apache-2.0. - Tags unique to espeak-ng: android, espeak, espeak-ng. - When multilingual support across over a hundred languages is required. ### Choose metavoice-src if… - metavoice-src is primarily Python; espeak-ng is C. - License: metavoice-src is Apache-2.0, espeak-ng is GPL-3.0. - Tags unique to metavoice-src: ai, deep-learning, pytorch, speech. - metavoice-src ships Docker support for self-hosted deployment. - When aiming for high-fidelity human-like TTS quality leveraging advanced deep learning approaches ## 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 metavoice-src - For users lacking a GPU with at least 12GB VRAM - Without Python version 3.10 to 3.12, metavoice-src might not function properly ## Common questions ### What is the difference between espeak-ng and metavoice-src? espeak-ng: Open source speech synthesizer supporting more than hundred languages and accents. metavoice-src: Foundational model for human-like, expressive TTS. See the comparison table for live GitHub stats and shared categories. ### When should I choose espeak-ng over metavoice-src? Choose espeak-ng over metavoice-src when espeak-ng is primarily C; metavoice-src is Python; License: espeak-ng is GPL-3.0, metavoice-src is Apache-2.0; Tags unique to espeak-ng: android, espeak, espeak-ng; When multilingual support across over a hundred languages is required. ### When should I choose metavoice-src over espeak-ng? Choose metavoice-src over espeak-ng when metavoice-src is primarily Python; espeak-ng is C; License: metavoice-src is Apache-2.0, espeak-ng is GPL-3.0; Tags unique to metavoice-src: ai, deep-learning, pytorch, speech; metavoice-src ships Docker support for self-hosted deployment; When aiming for high-fidelity human-like TTS quality leveraging advanced deep learning approaches. ### 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 metavoice-src? For users lacking a GPU with at least 12GB VRAM Without Python version 3.10 to 3.12, metavoice-src might not function properly ### Is espeak-ng or metavoice-src more popular on GitHub? espeak-ng has more GitHub stars (6,688 vs 4,203). Stars measure visibility, not whether either tool fits your constraints. ### Are espeak-ng and metavoice-src open source? Yes - both are open-source projects on GitHub (espeak-ng: GPL-3.0, metavoice-src: Apache-2.0). ### Where can I find alternatives to espeak-ng or metavoice-src? GraphCanon lists graph-backed alternatives at [espeak-ng alternatives](/tools/espeak-ng-espeak-ng/alternatives) and [metavoice-src alternatives](/tools/metavoiceio-metavoice-src/alternatives) ([espeak-ng markdown twin](/tools/espeak-ng-espeak-ng/alternatives.md), [metavoice-src markdown twin](/tools/metavoiceio-metavoice-src/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-metavoiceio-metavoice-src.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, espeak-ng or metavoice-src? espeak-ng: Very active. metavoice-src: Dormant. 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 metavoice-src? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [espeak-ng trust report](/tools/espeak-ng-espeak-ng/trust); [metavoice-src trust report](/tools/metavoiceio-metavoice-src/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/_