# eSpeak NG vs WellSaid Labs

| Attribute | eSpeak NG | WellSaid Labs |
|---|---|---|
| **Vioscale score** | 49.5 (26% (low)) | 43.3 (44% (low)) |
| activity.commits_last_30d | 36 | - |
| adoption.github_stars | 6,762 | - |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true}` |
| description.long | 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. | An enterprise text-to-speech platform providing over 280 realistic AI voices in multiple languages for creating training, marketing, and customer-facing audio content. Features unlimited generations during creation with usage tracked only on downloaded audio ready for production. |
| features.capabilities | - | `{"voice_cloning":true,"emotion_style_control":true,"cloning_consent_verification":true}` |
| integrations.count | 3 | 2 |
| integrations.list | `[{"name":"MBROLA"},{"name":"SAPI5"},{"name":"C API library integration"}]` | `[{"name":"Adobe Premiere Pro"},{"name":"Adobe Express"}]` |
| language.primary | C | - |
| license.spdx | GPL-3.0 | - |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"mac":true,"linux":true,"android":true,"windows":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","summary":"Free and open source","freeTier":true,"sourceUrl":"https://github.com/pricing","retrievedAt":"2026-08-19T22:01:16.060Z"}` | `{"type":"subscription","currency":"USD","freeTier":true,"sourceUrl":"https://www.wellsaid.io/resources/blog/ai-voice-pricing-finished-result","retrievedAt":"2026-08-25T15:35:31.102Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | free | low |
| pricing.transparent | yes | no |
| release.cadence_days | 799 | - |
| release.history | `[{"url":"https://github.com/espeak-ng/espeak-ng/releases/tag/1.52.0","date":"2024-12-12T13:47:27Z","type":"stable","version":"1.52.0"},{"url":"https://github.com/espeak-ng/espeak-ng/releases/tag/1.51","date":"2022-04-02T19:43:39Z","type":"stable","version":"1.51"},{"url":"https://github.com/espeak-ng/espeak-ng/releases/tag/1.50","date":"2019-12-02T12:34:16Z","type":"stable","version":"1.50"},{"url":"https://github.com/espeak-ng/espeak-ng/releases/tag/1.49.2","date":"2017-09-24T09:37:08Z","type":"stable","version":"1.49.2"},{"url":"https://github.com/espeak-ng/espeak-ng/releases/tag/1.49.1","date":"2017-01-21T21:20:08Z","type":"stable","version":"1.49.1"},{"url":"https://github.com/espeak-ng/espeak-ng/releases/tag/1.49.0","date":"2016-09-10T10:20:46Z","type":"stable","version":"1.49.0"}]` | - |
| security.gdpr | - | yes |
| security.scorecard | 4.5 | - |
| security.soc2 | - | yes |

## Capabilities (Text To Speech)

| Capability | eSpeak NG | WellSaid Labs |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Voice cloning | - | ✓ |
| Zero shot cloning | - | - |
| Streaming synthesis | - | - |
| Ssml support | - | - |
| Emotion style control | - | ✓ |
| On device offline | - | - |
| Open source | - | - |
| Watermarking provenance | - | - |
| Cloning consent verification | - | ✓ |

*Source: Vioscale. Generated 2026-09-01T15:15:09.736Z. "-" = undocumented, not absent.*