What is a pronunciation assessment API?
What a pronunciation assessment API takes in, what it returns (sentence, word and sound scores), scripted vs unscripted, pricing models, and how to choose one.
5 min read →How pronunciation scoring works
How an engine turns audio into pronunciation scores: forced alignment, goodness of pronunciation, native-reference calibration and correction decisions.
4 min read →How to handle tone sandhi in pronunciation scoring
How Mandarin tone sandhi (3-3 → 2-3, 不 before a 4th tone) breaks naive tone scoring, what we measured, and how a scoring API should handle it.
3 min read →Add pronunciation feedback to your app in an afternoon
Record audio, send it to a pronunciation assessment API from your server, and turn word and sound scores into feedback learners act on. JS and Python code.
5 min read →Pronunciation assessment API pricing, compared
Speechace from $40/mo, SpeechSuper from $20/mo, Azure ~$1 per audio hour: one cost-per-request table at 1k, 10k and 100k recordings. Checked Sep 2026.
3 min read →The best pronunciation assessment APIs in 2026
SpeechSuper, Speechace, Azure AI Speech, ELSA and TonePerfect compared on languages, scoring depth, unscripted support, pricing and privacy for language apps.
3 min read →Free pronunciation assessment APIs (2026)
Which pronunciation assessment APIs you can try for free in 2026: Azure’s free tier, SpeechSuper and Speechace trials, TonePerfect’s 50 credits, open source.
3 min read →