Commentary on other people's work is arguably the internet's single biggest content category, and it still has no native product.
Think about how a take actually travels. Someone screenshots a paragraph, crops the source out of frame, adds their own line on top and posts it. Someone screen-records 40 seconds of a podcast, slaps captions on it and uploads it as a Short. The take spreads, the original creator gets nothing, the context evaporates, and the reader has no cheap way to check whether the quote was even real. Quote tweets, reaction clips, duets, screenshot threads: an entire content economy built on other people's material, assembled with duct tape.
Because that is genuinely what the toolkit is. A screen recorder, a crop tool, a caption app and a quiet prayer that nobody files a copyright strike. There is no product where clipping, attributing and commenting are one motion.
The appetite for a proper annotation layer is not theoretical. X's Community Notes passed 1 million contributors in 2025, and contributors submitted 1.12 million English-language notes between January 2021 and March 2025. Millions of people volunteer their time to add context to someone else's post. The catch is that under 10% of those notes ever get published, and none of it works anywhere except inside X.
Here is the graveyard, though, and it matters. Genius spent a decade trying to annotate the entire internet, raised $77.7m from a16z, Dan Gilbert, Eminem and Nas, launched embeddable annotations for any publisher, and then quietly retreated to song lyrics. It sold to MediaLab in 2021 for $80m, roughly what it had raised, with preferred shareholders not made whole. Ben Horowitz had wanted to annotate the web since Netscape. The idea keeps being right and the execution keeps being early.
What is different now is that someone is paying cash for a specific, narrow version of it.
A sidebar Chrome extension that makes clip-and-comment a first-class product, with attribution welded in rather than bolted on afterwards.
Think Genius margin notes, but for video and audio as well as text, and pointed at the entire web rather than one lyrics database. The wedge is deliberately narrow: be the fastest way to share 40 seconds of a podcast with your opinion attached. The platform underneath, a permanent, attributed, searchable archive of what people said about what other people said, is a much larger thing.
Market size