Frizzle builds AI that grades handwritten math assignments for teachers and turns them into rich analytics and differentiated assessments. The tool provides instant step-by-step feedback to help personalize instruction for every student. Frizzle was named an official White House AI Education Partner and offers free seats to K-12 math and science teachers in Title I schools. The company was part of Y Combinator's Summer 2025 batch and is based in New York City.