# eSpeak NG

- **Canonical URI:** https://www.vioscale.ai/software/espeak-ng
- **Category:** Text To Speech
- **Homepage:** https://github.com/espeak-ng/espeak-ng
- **Also known as:** espeak-ng
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-26T19:32:25.121Z

## Vioscale score

**49.5 / 100**, confidence 26% (low). Computed 2026-09-01. _(updating — computed under an earlier model version or past its freshness window.)_

Composite of weighted, independently-sourced signals (no user reviews, no vendor payment).

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| price_level | 100 | 0.052 | 5.2 | ✓ |
| reliability | 0 | 0.073 | 0 | - |
| capabilities | 0 | 0.084 | 0 | - |
| repo_stars | 72.3 | 0.026 | 1.9 | ✓ |
| integrations | 17.3 | 0.09355555555555557 | 1.6 | ✓ |
| dependent_projects | 0 | 0.063 | 0 | - |
| dev_activity | 49.4 | 0.094 | 4.6 | ✓ |
| release_cadence | 0 | 0.052 | 0 | ✓ |
| security_posture | 0 | 0.073 | 0 | - |
| package_downloads | 0 | 0.136 | 0 | - |
| security_score | 45 | 0.042 | 1.9 | ✓ |
| pricing_transparency | 80 | 0.084 | 6.7 | ✓ |
| community_qa_activity | 0 | 0.063 | 0 | - |

## Pricing

_As of 2026-08-19, [verify at source](https://github.com/pricing). Independently observed._

Open source · Free tier

> Free and open source

## About

A lightweight open source text-to-speech engine that converts written text into spoken audio using formant synthesis. Available as a command-line tool and C/library for integration across Linux, Windows, Android, and other platforms.

_Independently observed._

## Platform & deployment

- **Platforms:** CLI, macOS, Linux, Android, Windows
- **Deployment:** Self-hosted

## Integrations (3)

_Independently observed._

- MBROLA
- SAPI5
- C API library integration

## Release history

| Version | Date | Type |
|---|---|---|
| [1.52.0](https://github.com/espeak-ng/espeak-ng/releases/tag/1.52.0) | 2024-12-12 | stable |
| [1.51](https://github.com/espeak-ng/espeak-ng/releases/tag/1.51) | 2022-04-02 | stable |
| [1.50](https://github.com/espeak-ng/espeak-ng/releases/tag/1.50) | 2019-12-02 | stable |
| [1.49.2](https://github.com/espeak-ng/espeak-ng/releases/tag/1.49.2) | 2017-09-24 | stable |
| [1.49.1](https://github.com/espeak-ng/espeak-ng/releases/tag/1.49.1) | 2017-01-21 | stable |
| [1.49.0](https://github.com/espeak-ng/espeak-ng/releases/tag/1.49.0) | 2016-09-10 | stable |

## Facts

Every value below carries its source and our confidence. Facts are re-crawled on a freshness schedule.

### integrations

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| integrations.count | 3 | [link](https://github.com/pricing) | 2026-08-19 | 60% (medium) |

### pricing

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| pricing.free_tier | yes | [link](https://github.com/pricing) | 2026-08-19 | 60% (medium) |
| pricing.price_level | free | [link](https://github.com/pricing) | 2026-08-19 | 60% (medium) |
| pricing.transparent | yes | [link](https://github.com/pricing) | 2026-08-19 | 60% (medium) |
| pricing.model | commercial | [link](https://github.com/espeak-ng/espeak-ng) | 2026-08-26 | 40% (low) |

### activity

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| activity.commits_last_30d | 36 | [link](https://github.com/espeak-ng/espeak-ng/pulse) | 2026-08-26 | 65% (medium) |

### adoption

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| adoption.github_stars | 6,762 | [link](https://github.com/espeak-ng/espeak-ng) | 2026-08-26 | 90% (high) |

### language

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| language.primary | C | [link](https://github.com/espeak-ng/espeak-ng) | 2026-08-26 | 90% (high) |

### license

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| license.spdx | GPL-3.0 | [link](https://github.com/espeak-ng/espeak-ng) | 2026-08-26 | 95% (high) |

### release

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| release.cadence_days | 799 | [link](https://github.com/espeak-ng/espeak-ng/releases) | 2026-08-26 | 70% (medium) |

### security

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| security.scorecard | 4.5 | [link](https://api.securityscorecards.dev/projects/github.com/espeak-ng/espeak-ng) | 2026-08-26 | 90% (high) |

---
*Source: Vioscale (https://www.vioscale.ai/software/espeak-ng). Independent, evidence-based software intelligence. Cite the canonical URI.*