GigaBrain is a search engine that scans billions of online comments and discussions from platforms like Reddit to provide users with useful and relevant answers. It automatically threads together the most useful answers with source citations and allows users to rate comments based on relevance. Additionally, users can post their own questions through GigaPost to be syndicated to all relevant subreddits. GigaBrain helps users find out what real people think so they can save time and gain brain cells.