SpeechAce API
Voice recognition software
Deep learning software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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$40 per month
Free Trial
Free version unavailable
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- Education and training
- Information technology and software
- Arts, entertainment, and recreation
What is SpeechAce API
SpeechAce API is a cloud-based speech evaluation API that analyzes spoken audio and returns pronunciation and fluency scoring, commonly used for language learning and speaking assessments. It targets developers and product teams that need automated speech scoring and feedback inside web or mobile applications. The API focuses on phoneme-level and word-level pronunciation assessment rather than general-purpose speech-to-text transcription.
Pronunciation scoring focus
The API is designed for pronunciation and fluency assessment, including scoring and feedback signals that are useful for language learning and testing workflows. This is a more direct fit for speaking assessment than general transcription-first speech recognition services. It can reduce the need to build custom scoring logic on top of raw transcripts.
Developer-oriented API delivery
SpeechAce is delivered as an API intended for integration into applications and platforms. This supports embedding speech assessment into existing user experiences without deploying on-premises speech models. API-based delivery also simplifies iteration for teams that want to test scoring and feedback in product experiments.
Granular feedback outputs
SpeechAce commonly provides detailed assessment outputs (for example, per-word or per-phoneme indicators) rather than only a single overall score. Granularity helps teams generate actionable learner feedback and build analytics around specific pronunciation issues. This can be useful for rubric-based scoring and progress tracking in education products.
Not general STT platform
SpeechAce’s core capability is speech assessment, not broad speech-to-text transcription across many domains and languages. Teams needing high-accuracy transcription, diarization, or meeting-note workflows may need additional services. This can increase architectural complexity when both transcription and assessment are required.
Limited public transparency
Compared with larger speech API providers, public documentation on model coverage (languages, accents), benchmark results, and operational limits can be harder to validate from third-party sources. This makes it more difficult to compare accuracy and robustness across vendors using standardized metrics. Buyers may need to rely on pilots and vendor-provided testing to validate fit.
Cloud dependency and data handling
As a hosted API, usage depends on network connectivity and the vendor’s service availability and latency characteristics. Organizations with strict data residency, offline, or on-device requirements may find the deployment model limiting. Security and compliance reviews may be needed to confirm how audio is processed, stored, and retained.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Basic | $40 per month | Word & sentence pronunciation scoring; phoneme & syllable-level feedback; Supported languages: English (US, UK), French (FR, CA), Spanish (ES, MX); Max audio length: 30 seconds; Includes 5,000 15-second monthly requests; Additional requests: $0.008 per 15-sec audio. |
| Pro | $80 per month | Everything in Basic + Passage read-aloud fluency metrics (Fluency score; IELTS/CEFR/PTE/TOEIC rubrics); lexical stress, intonation, pausing, rate measures; Max audio length: 45 seconds; Includes 10,000 15-second monthly requests; Additional requests: $0.008 per 15-sec audio. |
| Premium | $125 per month | Everything in Pro + Spontaneous speech assessment (audio transcription & language detection; vocabulary, grammar, coherence, relevance/task-achievement scoring); Max audio length: 2 minutes; Includes 10,000 15-second monthly requests; Additional requests: $0.0125 per 15-sec audio. |
| Pro (30k SKU) | $250 per month | Shop SKU: "SpeechAce-API-PRO-250" — 30,000 15-second Pro API calls per month; 14-day free trial; no charge if cancelled within trial. (Official shop subscription SKU). |
| Enterprise / Custom | Custom pricing | Volume, bulk, discounted annual and enterprise plans available — contact Sales. Monthly subscription fees act as credit; overages billed per 15-sec unit; annual contracts may allow credit rollover. |
