sAInaptic is developing an AI-based grading algorithm that automatically marks descriptive student responses to open-ended questions to give instant, personalised teacher-like feedback, while drastically reducing marking workload for teachers. Our algorithm is proprietary, developed using state of the art natural language processing techniques. It is commercialised as a web-app and sold to students as a monthly subscription for independent, feedback-driven revision and to schools as annual subscriptions, for auto-marked homework and tests. sAInaptic is entering a global billion dollar tutoring & assessments market, starting with schools, with a bold vision to integrate with any online course using an API.