Witness
Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

Witness is a voice-first journal and AI interviewer that helps people reflect on their lives, turn everyday experiences into stories, and find others who have been through something similar. The idea began with a fear: if we never tell our stories, so much of who we are disappears into statistics. Witness gives people a way to be heard without having to write an autobiography from beginning to end. They can start with one question, one conversation, or one small moment. Muse Spark asks contextual follow-up questions, organizes answers into events, and helps edit stories. A bounded verification loop checks drafts against the original answers, preserves uncertain details, and links passages to their sources for review. Muse Voice Transcribe turns recordings into editable text. On Connect, users choose a personal event and explore related public stories on an interactive illustrated globe. Date and place filters narrow the search, while Muse Spark compares the meaning of the stories. Animated letters and location lights make those connections visible. Users can also assemble stories into a personal book or adapt a memory into an illustrated film. Muse Spark plans source-linked scenes, Muse Image creates illustrations, and the app combines images, captions, and optional narration into a downloadable video. Witness is built as a PWA, with guest-first storytelling, optional Google sign-in, and explicit control over which stories are published. Muse Code supported development and testing.