You wrote it.
MATCHA proves it.

MATCHA is a combined word processor and browser that lets anyone prove their authorship by blocking automation and recording their complete process, including reading, note-taking, and editing. It brings research, writing, and referencing into one workspace. For school work, it supports whole-process assessments that give richer feedback, while locked-down mode secures in-person exams and follow-up quizzes. Educators and editors can assess the work and how it was produced, without relying on AI policing.

Not primarily. AI detectors guess from the finished text. MATCHA makes AI misuse impractical instead: it blocks or marks outside text and automated input, and it documents the whole writing process. Educators can review work history, use follow-up quizzes, or choose supervised writing with locked-down mode instead of relying on AI-detection scores. For a closer look, submissions can be flagged based on their process metrics (such as reading time and character churn) and automated AI transcription detection. A complete replay is also possible.

At home, we don't! But using AI on the side doesn't allow students to avoid doing work because they need to show their entire process, including reading, in MATCHA. See the at-home assignments page for more information on how MATCHA makes home assignments AI-resistant.

Yes. Students, academics, and independent authors can use MATCHA to research, take notes, manage references, and write. Your writing history gives you a way to show how your work developed.

MATCHA includes an optional, auditable AI assistant. Instructors can configure what assistance is available, including a pedagogical mode that helps students make their own corrections. AI assistance can be fully disabled.

Create an instructor account, set up a course and writing activity, then share the activity with your students. The Educator’s Guide walks you through your first assignment. Students use the MATCHA desktop app to write.

MATCHA’s proctoring does not collect camera footage, microphone data, or screenshots. For instructor-led activities, the Activity Summary explains what information is collected and who it is shared with before a student starts. Collection depends on the features enabled for the activity, and institutions can choose from several privacy levels. Installation does not require administrator privileges or special operating-system permissions. Explore privacy and data protection.

Yes. MATCHA saves your working project in its own .mcha format and can export signed Word-compatible .docx files. It also supports PDF export via LaTeX and can import .docx and LaTeX files, although formatting may need adjustment after import. Authorship certification is attached to signed .docx exports and project histories, not to PDFs. Keep the original project when you want to preserve your full writing history. Learn about certified documents.