Glance - An AI fact-checking overlay for X that is actually sustainable

Glance is a browser extension that fact-checks posts in your X/Twitter feed as you scroll. A small icon sits next to each post, reads the content, and surfaces missing context, disputed claims, and things that are being pushed back on in the replies. It works on any Chromium-based browser.

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.

Average cost landed at ~$0.0015 per post, which looks sustainable with a subscription model, and can definitely be optimized.