Product · 2026-02-18 · 12 min
SaaS from MVP to production in 90 days: a stack that will not trap you
A 90-day SaaS launch is possible if you freeze the stack, ship auth and billing first, and treat observability as a feature, not a polish item.
The trap is rewriting the stack every time a blog post trends. Pick a boring path: Next.js, a managed Postgres, a typed API, and a payment provider you already understand.
A 90-day outline
Stripe, Clerk or Auth.js, Vercel or a container host, and OpenTelemetry will take you surprisingly far. Custom everything can wait until a customer pays you to care.
- Days 1–14: problem, personas, auth, and a clickable happy path.
- Days 15–45: core workflow, billing, roles, and staging with real data shapes.
- Days 46–75: performance, backups, error tracking, and a private beta.
- Days 76–90: security review, runbooks, and a launch that you can roll back.
Metrics that matter before PMF
Activation, weekly retention, and time-to-value beat vanity dashboards. Instrument those three events on day one so you are not guessing in month three.