No-code tools get you 90% of the way. When you need the last 10% — custom logic, a real backend, an API — Replit is where I go. Here's the lean path from idea to paid product.
The 4-week MVP path
Week 1 — Validate. Post the idea as a landing page with a waitlist. If nobody signs up, kill it and move to the next idea.
Week 2 — Build the core. One screen, one function, done. Use this prompt pattern:
Build a [web app] that lets [audience] do [one job].
Include: auth, [core feature], a clean dashboard.
Skip everything else. Ship it ugly if you have to —
real users forgive ugly, they don't forgive broken.
Week 3 — Charge money. Add Stripe on day one of beta. $9 from 5 users teaches you more than 500 free users ever will.
Week 4 — Automate and iterate. Set up deployment, fix what the first users broke, add the #1 requested feature only.
SaaS ideas that are working right now
- Niche calculators with shareable results (SEO + built-in distribution)
- Scraper + AI summary dashboards for one specific industry
- Internal tools you sell to the industry you already work in
- API wrappers that make a complicated AI model point-and-click
How to make money with it
- Make money online: $9–$49/mo SaaS subscriptions; 100 users at $19 = $1,900/mo
- Help your existing business: automate the report, quote, or spreadsheet process you do manually every week
- Offer it as a service: custom MVP builds for non-technical founders — $3,000–$10,000 per project is standard