Speed and durability aren't opposites. Here's the ten-week shape we use to launch products that don't need a rewrite by month three.

Ten weeks is enough to launch a real SaaS product — but only if you spend the time on the right thirty percent and ruthlessly defer the rest. The trap isn't moving fast; it's moving fast on things that don't matter yet.

Weeks 1–2: prove the riskiest assumption

We open every build by isolating the single assumption that, if wrong, sinks the product. Usually it's a workflow nobody has validated end to end. We build a thin vertical slice through it before writing a line of polished UI.

Weeks 3–7: build the spine, fake the limbs

  • Real auth, real data model, real core workflow — no shortcuts on the spine.
  • Stub anything peripheral: billing, admin, exotic integrations.
  • Ship to a staging URL the founders use daily from week three.
  • Instrument activation from the first deploy, not the last.

Weeks 8–10: harden and launch

The final stretch is where durability is bought: error handling, empty states, the boring reliability work that decides whether early users stay. A product that survives launch is one where the spine was built for real and the limbs were honest stubs you can now replace without surgery.

Move fast on the spine, fake the limbs, and never lie to yourself about which is which.