Build a Micro SaaS With an AI Coding Agent: Stack and Costs
You can launch a micro SaaS this month for $0 in hosting. The catch is knowing when the free tiers stop being free. I checked the live pricing pages today. Here is the stack, the costs, and the point where you start pay
You can launch a micro SaaS this month for $0 in hosting. The catch is knowing when the free tiers stop being free.
I checked the live pricing pages today. Here is the stack, the costs, and the point where you start paying.
Free stuff (grab these first)
- AI Employees: my open source, MIT licensed roles, 60 scheduled routines across 8 roles. Free to hire.
- Supabase Free plan: $0 a month, 50,000 monthly active users, 500 MB database, 2 active projects.
- Vercel Hobby: $0 a month, import your repo and deploy.
- Stripe pricing: no setup or monthly fees, you pay per successful transaction.
The stack
| Piece | Pick | Cost on the live page |
|---|---|---|
| Database and auth | Supabase | Free: $0. Pro: from $25 a month |
| Hosting | Vercel | Hobby: $0. Pro: $20 a month |
| Payments | Stripe | 2.9% + 30ยข per successful domestic card transaction |
| Builder | An AI coding agent | Your plan |
That is $0 a month before your first customer. Stripe only costs money when you get paid.
Where the free tier bites
- Supabase Free projects are paused after 1 week of inactivity. A quiet app goes to sleep. A paying customer should never meet that.
- Two active projects on Free. Fine for one product, tight for three.
- Stripe's cut is real. On a $20 sale, 2.9% + 30ยข is about 88ยข. Price with that in mind.
The first paid upgrade is usually Supabase Pro at $25 a month. Plan for it before launch day, not after.
What the agent does, what you do
The agent writes the app. You decide:
- One customer type. Not "everyone".
- One job the app does better than a spreadsheet.
- One price and one checkout.
Keep scope small. A micro SaaS is one screen that earns, not a platform.
Where I put the launch
I run Favors.dev for this part. It is a marketing co-op for founders: help another founder's launch with a testimonial, a share or real feedback, and earn points. Spend them to get people behind yours. Free to join, 50 points on signup, 200 more with your first favor. Points are earned, not bought.
Start trading favors on Favors.dev
This week
- Pick the customer and the one job. Write both in one sentence.
- Create a free Supabase project and a Vercel Hobby deploy.
- Wire one Stripe Checkout price.
- Ship to five people you know need it.
- Note the day you hit a free-tier limit. That is your upgrade date.
I am not quoting revenue numbers. No live page states what micro SaaS apps earn, so I will not invent one.
Small ask: tell me in the comments what your one job is.
Come hang out with other builders: Vibe Coding is Life on Facebook or on Skool.
Originally published by Dev.to WebDev. Aggregated on AIWithGhost for educational purposes โ full credit and traffic to the original publisher.