Papermark is open-source document sharing with page-by-page analytics: upload a deck, share a link, and see who opened it, how long they spent, and where they stopped reading. Custom domains, data rooms and access controls cover the fundraising workflow without the legacy price tag.
It suits founders sharing pitch decks who want signal on investor interest, and teams that prefer open source they can self-host. It is young and focused — heavyweight enterprise virtual-data-room needs are out of scope.