Matt Turley, Continuum. Updated November 5, 2026.
For founders coming out of a demo day (Y Combinator's or any other accelerator's), or any burst of investor and press attention, with a product that an AI tool helped them build.
The app was built to be demoed, and now it has to be used. After a demo day expect a spike of signups and inbound requests, technical questions from investors and prospects, and costs that scale with usage. Check capacity and spend limits, close public exposure, move accounts to company ownership and prepare honest answers about security and data.
A demo-day product is optimised for one thing: looking good for a few minutes. After the event, the same code has to survive curious strangers, follow-up diligence and the first customers who rely on it. The gap between those is where the work is.
Three things arrive at once. Volume: a one-time rush of signups, many from people who will never come back and a few who matter. Scrutiny: investors, their advisors and prospective customers ask about security, data and who else can access the system. And obligation: someone pays, depends on it or entrusts you with their data.
None of this requires a rewrite. It requires deciding, deliberately, what you will promise now and what you will fix in the next month.
How to tell Pages slow down or fail in the hours after an announcement. Free tiers, a small database plan or a model API with a low limit are reached by simple arithmetic.
The fix Know your limits before the spike: the database plan, connection pooling, function time limits and API rate limits. Raise what you can ahead of time and add a queue for expensive work.
How to tell AI calls, email and storage are billed per use, and a free signup can cost you money. A few heavy or abusive users account for most of the bill.
The fix Set spend caps and alerts, limit usage per account, and put anything costly behind login and, where it fits, a quota.
How to tell Hard-coded demo accounts, a login bypass, feature flags in the URL, test API keys, seeded data that looks real, console logging of user input.
The fix Search for every demo-only path and remove or gate it. A bypass written for a demo is a way in for anyone who finds it.
How to tell A prospect or investor asks how data is protected, who has access, whether it is encrypted and how you would find out about a breach. You find that you do not know.
The fix Write down the facts: where data lives, who has access, which vendors touch it and what you do on an incident. Answer from facts you checked rather than from hope. Our first security questionnaire page goes through it.
How to tell Repository, hosting, domain, database and payment accounts sit with one founder's personal email, a contractor or an AI tool's workspace, with no second admin.
The fix Move every account under company ownership, add a second administrator, turn on two-factor authentication and keep a list of where secrets live.
How to tell Refunds, plan changes, a failed card, a user who wants to delete their data. The happy path was built; the unhappy ones were not.
The fix Walk through the paid lifecycle as a customer would: subscribe, upgrade, fail a payment, cancel, refund and delete the account. Fix what is missing before it is asked for.
If you can answer the security questions from facts you already know and the app handled the spike, keep going and fix things as customers expose them. You want help when the app was largely AI-generated and nobody has read it end to end, or when a prospect or investor has asked for a technical review you are not sure you would pass.
A Ship Check is an independent written read of the codebase: a verdict, what will break first, a security and data read and a costed plan. It gives you something factual to base your answers on, and to hand to a technical reviewer.
Ship Check, $299: A senior engineer reads your codebase and sends a written verdict (fine, fixable or rewrite), what will break first, a security and data read, and a costed plan, within 48 hours of repo access or it is free. It has a 7-day money-back and is credited against a Ship Fix. Or: See Ship Fix, $4,000 to $15,000.