Flint

Flint develops an all-in-one AI platform designed for K-12 schools that enables teachers to personalize learning for every student. The platform features an AI teaching assistant called Sparky that supports teachers with lesson planning, creates interactive activities tailored to teaching style, and provides real-time classroom insights. For students, Flint delivers customized learning experiences adapted to individual skill levels, interests, and academic goals across subjects including math, English, science, social studies, computer science, and world languages. The platform includes over 25 built-in features such as content upload (PDFs, Word documents, PowerPoint, CSV), math accuracy verification, whiteboard functionality, in-line citations, image processing and generation, evidence-based feedback, text-to-speech and speech-to-text, code editor, essay writing feedback, custom rubrics, LMS and SIS integrations, and full admin visibility with custom AI guardrails. Flint supports responsible AI use across districts with transparency and oversight tools, AI literacy courses and certifications for teachers, and a free AI policy library used by thousands of educators. Founded in 2023 and headquartered in San Francisco, California, Flint has raised $15.5 million in a Series A round backed by Y Combinator, Basis Set Ventures, Patron, USC, AME Cloud Ventures, and Afore Capital.