PhonemeLab

The problem

Teachers cut speaking practice first, because listening to 25 recordings and writing individual feedback isn't sustainable. And subscription software charges them for seats they don't use.

The product

Teachers build speaking assignments in minutes. Students record and get instant, sound-level feedback. Teachers verify before anything counts. Reporting shows which patterns are actually holding a class back. Billed on usage, not idle seats.

What it took

Speech-analysis pipeline, role-based access across teachers, students, parents and school admins, and a metered credit billing system with checkout, balances and usage gating. Live and self-serve — customers sign up and pay without me touching anything.