We waited 6 months before building this because the economics looked impossible. A decent quality AI fact-checking analysis is $0.05-0.15 per post, a typical user scrolls hundreds of posts per seconds.

The only way to make the math work was a pipeline that leverages the comment section to triage posts and analyze in depth only when it's necessary. It works more or less like this:

  1. Local filter in-browser (free): short posts, already-seen content.                                                                                                                                       
  2. Small-model triage: does this post even make a factual worth checking?
  3. Comment analysis (main path): pull the replies, analyze them alongside the post.
  4. Full web-search analysis: only when steps 1-3 can't decide.