A one-pager is a single-page document summarizing a startup's business, market, traction, team, and capital ask for investors. It's used as a cold-outreach attachment when a full pitch deck would be too heavy, as a leave-behind after meetings to keep the conversation alive, or as an alternative artifact for some investor styles (especially angels or family offices) who prefer concise prose over slides. It is one of the most-undervalued fundraising artifacts because founders pour effort into the deck and treat the one-pager as an afterthought, missing that the one-pager is what actually gets forwarded inside investor firms.
The structure that consistently works: headline + tagline (one sentence describing what the company does, who...