Speechace

Most standard speech recognition providers focus entirely on transcribing what a user is saying. Speechace is a specialized, patented B2B speech assessment API explicitly engineered to evaluate how well a user is speaking. Built primarily for edtech publishers, universities, and corporate recruitment platforms, it analyzes audio files to pinpoint precise structural errors down to the individual syllable and phoneme levels while providing predictive scores matching standardized language exams.

Speechace natively maps its grading metrics to major global language standards and high-stakes testing frameworks. The automated engine evaluates speaking samples and delivers immediate score estimates aligned directly with the Common European Framework of Reference for Languages, IELTS, PTE, TOEFL, and TOEIC. The system operates on a 0 to 100 internal scoring rubric, providing localized granularity for specific regional dialects across English, French, and Spanish.

The capabilities scale logically based on the type of speaking activity being processed: Basic (Pronunciation API): Tailored for short, structured word or sentence repetition exercises, returning distinct quality scores for syllables and phonemes with a maximum 15-second audio limit. Pro (Fluency API): Adds lexical stress, intonation, pausing rates, length of run, and words-correct-per-minute metrics for long-form passage read-aloud activities up to 45 seconds. Premium (Spontaneous Speech API): Built for open-ended, free-speaking prompts up to 2 minutes long, evaluating natural vocabulary usage, grammar, coherence, task achievement, and contextual relevance.

The technology operates as a lightweight, developer-focused REST API that processes standard web audio formats like WAV, MP3, M4A, and WebM via direct HTTP requests. To accelerate deployment, Speechace provides public repositories containing ready-made HTML5 audio recording modules compatible with mobile iOS and Android browsers. Most development teams can safely configure, test, and deploy a fully automated speaking practice activity within a single week.