A pre-seed round is the first institutional check a startup raises, usually before product-market fit and often before revenue. Round sizes range from $250K to $2M; valuations (or caps) sit between $4M and $12M post-money. Most pre-seed rounds are SAFEs or convertible notes rather than priced equity.
Pre-seed investors price the team, the market, and the founders' ability to compress learning faster than the cash burns. Specialist pre-seed funds, angels, and accelerators dominate this stage; multi-stage funds occasionally write small pre-seed checks as options on later rounds.