What we learned from B2B SaaS YC applications

“You peaked at 8 families and dropped to 3, which suggests you have not solved retention or onboarding well enough to scale.”

6.9/10·Real product in a huge market, but you need to prove this works beyond friends and family before someone copies you.

“One technical user and five waitlist signups after twelve days is execution signal, not market pull.”

8.0/10·Strong builder in a hot market, but needs to prove repeatability: get from one user to ten in 60 days.

“Two users after 11 months full time is not traction, it's a research project with a privacy excuse.”

6.6/10·Sharp clinical insight and real product, but you need 100 users in 90 days or this stays theoretical.

“You built real traction off personal pain, but your entire business model rests on unproven Year 2 AUA conversions that don't activate until Q3 2026.”

8.3/10·Strong early pull and smart economics, but prove the AUA transition works and that sales scale beyond Devin before calling this repeatable.

“Six months of solo building without a single analyst testing it is a classic build-in-a-cave mistake.”

6.6/10·Strong founder-market fit and impressive self-taught execution, but desperately needs real users now.

“A solo founder with no cofounder, relying on Claude Code to build hard infrastructure that a Fortune 100 Deputy CISO deemed insufficient, has not closed a single customer in four months.”

7.0/10·Strongest enterprise validation signal at this stage, but lives or dies on closing one design partner before the buyer ghosts or infrastructure debt compounds.