eSpeak NG
Free, multilingual voice synthesis software for multiple platforms
- Also known as
- espeak-ng
What is eSpeak NG?
An open source application that generates audio speech from text, supporting numerous languages across Windows, Linux, and Android systems. It employs sound-generation technology to produce clear but synthesized speech efficiently on computers and mobile devices.
eSpeak NG pricing
We don't have eSpeak NG's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What eSpeak NG does
The capabilities that matter for text to speech, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Voice cloning
- -
- Zero shot cloning
- -
- Streaming synthesis
- -
- Ssml support
- ✓
- Emotion style control
- -
- On device offline
- ✓
- Open source
- ✓
- Watermarking provenance
- -
- Cloning consent verification
- -
Platform & deployment
Independently observed- CLI
- Linux
- Android
- Windows
- On-premise
- Self-hosted
Integrations (3)
Independently observed- MBROLA
- SAPI5
- C API library integration
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
eSpeak NG FAQ
Common questions about eSpeak NG, answered from independent, dated evidence.
What is eSpeak NG?
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. It is indexed under Text To Speech.
Source: https://github.com/pricing
Is eSpeak NG free to use?
eSpeak NG is open source, so it can be self-hosted and used at no licence cost. It is released under the GPL-3.0 licence. Pricing changes often, so verify at source before relying on it.
Source: https://github.com/pricing
What platforms does eSpeak NG support?
eSpeak NG supports Windows, macOS, Linux, Android and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://github.com/pricing
Can eSpeak NG be self-hosted?
Yes. eSpeak NG can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://github.com/pricing
What does eSpeak NG integrate with?
We have confirmed 3 integrations for eSpeak NG, including MBROLA, SAPI5 and C API library integration. This is what we could verify from public sources, so the vendor may support others we have not indexed.
Source: https://github.com/pricing
Is eSpeak NG open source?
Yes. eSpeak NG is published under the GPL-3.0 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.
eSpeak NG alternatives
Other text to speech we track, ranked by the same independent score.
- Amazon PollyConverts text to natural-sounding speech using AI networksmedium · 73%
- Murf AIAI-powered voice platform for synthesizing, transforming, and localizing spoken contentmedium · 53%
- Coqui TTSA deep learning toolkit for converting written text into natural-sounding speechlow · 28%
- WellSaid LabsGenerate realistic studio-quality synthetic voices from text in secondslow · 36%
- ElevenLabsAPI platform for generating realistic synthetic speech and audio contentlow · 34%
- Parler-TTSA lightweight text-to-speech model for generating natural speech in different speaker styleslow · 20%
Compare eSpeak NG
Side by side against other text to speech, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for eSpeak NG, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Development activity | 51 | 0.14 | 6.9 | ✓ |
| Capabilities | 58 | 0.08 | 4.6 | ✓ |
| Stars | 73 | 0.05 | 3.4 | ✓ |
| Security score | 47 | 0.05 | 2.5 | ✓ |
| Integrations | 17 | 0.05 | 0.9 | ✓ |
| Dependent projects | 0 | 0.05 | 0.0 | ✓ |
| Release cadence | 0 | 0.08 | 0.0 | ✓ |
| Security posture | 0 | 0.12 | 0.0 | - |
| Package downloads | 0 | 0.04 | 0.0 | - |
| Developer Q&A activity | 0 | 0.14 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 42 | mediumsource · 2026-09-14 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 6 items | mediumsource · 2026-09-10 · 66% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Open source, Ssml support, On device offline | mediumsource · 2026-10-14 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 3 | mediumsource · 2026-08-19 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | C | highsource · 2026-10-14 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | GPL-3.0 | highsource · 2026-10-14 · 95% |
Pricing
Release
Security
| Attribute | Value | Evidence |
|---|---|---|
| Scorecard | 4.7 | highsource · 2026-10-14 · 90% |
| Vulnerabilities | Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=debian&package_name=espeak-ng&per_page=100 · Last 12m: 0 | highsource · 2026-10-14 · 90% |
| Trust center | https://github.com/security | mediumsource · 2026-10-14 · 60% |
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