openSMILE
Open-source toolkit for extracting audio features.
At a glance
- Editor scoreNot yet scored
- PricingFree plan
- Best forResearchers building audio-analysis workflows
- Free planYes
- Paid fromNone
- Facts checked24 Sep 2026
Where it wins
- Extracts audio features from audio signals
- Open-source and available on a free plan
- Supports research and development audio-analysis workflows
Where it doesn't
- Not a hosted voice-analysis service
- Requires developer-led implementation in your environment
- Does not provide complete voice or conversation assessment
Our verdict on openSMILE
openSMILE is an open-source software toolkit for analyzing audio signals and extracting audio features. It is aimed at researchers and developers building audio-analysis workflows, including work involving speech, music, and emotion recognition. The product’s scope is foundational feature extraction and analysis support, making it a fit for teams that need a toolkit they can incorporate into research and development rather than a ready-made voice-assessment application.
The published offering is open source with a free plan, so access to the toolkit does not depend on a paid subscription tier. Its developer-oriented format shapes the onboarding experience: teams should expect to incorporate software into their own audio-analysis workflow instead of signing up for a hosted service with a packaged interface. That model can suit research groups defining their own processing and analysis methods, while organizations seeking an immediately configured service may need a different type of product.
openSMILE’s strongest use case is extracting audio features that serve as inputs to broader research or development work. It supports analysis involving speech, music, and emotion recognition, but it is not positioned as a complete voice-assessment or conversation-analysis product. Choose it when control over feature extraction and workflow design matters; choose an alternative when the requirement is an end-to-end application for interpreting conversations, assessing voices, or delivering a finished hosted experience.
openSMILE pricing
openSMILE fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Analysis focus | Behavior |
| Real-time analysis | Not verified |
| Speaker separation | Not verified |
| Supported languages | Not verified |
| Deployment | Not verified |
| API access | Not verified |
| Pricing | Free plan |
| Website | audeering.com |
| Facts checked | 24 Sep 2026 |
Alternatives to openSMILE
- Behavioral Signals APIBroad real-time and batch voice analytics with emotion, behavior, and deepfake detection.6.5
- audEERING devAIceBroad voice-analysis modules, real-time edge processing and prepaid API bundles for developers.6.7
- Phonexia Voice ComplianceAnalyzes customer conversations with speaker, emotion, keyword, and call-flow signals.—
See all openSMILE alternatives →
openSMILE vs the competition
- openSMILE vs Behavioral Signals API
- openSMILE vs audEERING devAIce
- openSMILE vs Phonexia Voice Compliance
- openSMILE vs Dr.Speech Vocal Assessment
- openSMILE vs LANGaware
- openSMILE vs thymia
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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