stylus was founded by former teachers and education technologists to make reliable, teacher-quality AI marking accessible to every school — regardless of technology. Unlike most tools, stylus works with paper: teachers print resources, students write responses, and stylus delivers curriculum-aligned marking and feedback without needing 1:1 devices. Student work is transcribed with better-than-human handwriting accuracy and assessed against nearly 100 teacher-authored criteria, ensuring objective, consistent results at scale. All data is anonymised, never used to train models, and outputs include teacher and student reports, confidence scores, and targeted next steps tasks. Endorsed by the UK Department for Education and transforming marking nationwide, stylus combines innovative AI, classroom expertise, and rigorous quality assurance to save teachers time, protect student data, and raise standards.