The Demo Day countdown.
The wins, mistakes, and chaos of building RonanRx on the road to Demo Day 2026.
27days untildemo dayDay 27Aug 14Back in YC, sixteen years laterSixteen years after his first Y Combinator batch, he is back in the current one. Sets the target the rest of the run is measured against: ten percent growth a week.
26days untildemo dayDay 26Aug 15The agent broke overnightAn automated agent was set loose on stalled patient conversations and did not survive the night.
25days untildemo dayDay 25Aug 16Racing for a flight to buy a pharmacyTo do what the company needs to do, it has to own a pharmacy. First he has to make the flight to San Diego.
24days untildemo dayDay 24Aug 17Buying the pharmacyThe purchase goes through. Software stops being the whole company on this day.
23days untildemo dayDay 23Aug 18The prescription with no syringeEvery legal step to manufacture and ship a prescription drug was solved, except the one thing a patient needs when the box arrives.
22days untildemo dayDay 22Aug 19A copywriter roasts the websiteNeville Medhora goes through the AI-written site line by line, on camera, and it does not go well.
21days untildemo dayDay 21Aug 20Free haircuts outside YCA stunt on the sidewalk outside Y Combinator: free haircuts, and a conversation about GLP-1s while you sit. Thirty two cuts, three customers.
20days untildemo dayDay 20Aug 21Paul Graham names the companyPaul Graham names the company at his house. Never cut locally, so this is the copy that went out on X. At 4:31 it is the longest of the run.
17days untildemo dayDay 17Aug 24YC doesn't want old foundersAn airport monologue about age and kids and who Y Combinator is supposed to be for. Six kids, two batches, sixteen years apart.
16days untildemo dayDay 16Aug 25The whole company in one carEveryone piles into one car and drives to Oakland with two hours to shoot a clean room commercial. Contains the payoff to day 20.
15days untildemo dayDay 15Aug 26Missed the dayForty four seconds, filmed at midnight, about having missed day 15 entirely while building the investor deck. Fire alarm going off.
14days untildemo dayDay 14Aug 28Fundraising opensThe business update people had been asking for, and the day fundraising opened.
10days untildemo dayLaunchAug 31We built a pharmaceutical factory to sell drugs on the internetNot a countdown episode. This is the RonanRx launch, and it did roughly twenty five times what the whole series did combined.
5days untildemo dayDay 5Sep 5The final stretchSeventy five meetings deep, in the last week before Demo Day.