Question 1

How accurate are the calculator results?

Accepted Answer

Very accurate for planning purposes. The metrics calculator uses real Stripe fee rates at 2.9% plus $0.30. It uses industry standard SaaS churn benchmarks and realistic gross margins. The cost estimator is based on actual hours from my 7 shipped projects. Use these numbers to pressure test your assumptions before committing budget.

Question 2

Do the cost estimates include third party service costs?

Accepted Answer

Development costs only. Third party operational costs are separate. Vercel Pro costs about $20 per month. Supabase Pro costs about $25 per month. Stripe transaction fees are 2.9% plus $0.30 per charge. Domain registration is about $15 per year. Resend for email costs about $20 per month at scale. Budget roughly $50 to $100 per month to run your MVP after launch.

Question 3

How does the idea validation score work?

Accepted Answer

The AI scores your idea across four dimensions. Problem Clarity worth 25 points. Target Market Specificity worth 25 points. Business Model Viability worth 25 points. Competitive Moat worth 25 points. Scores of 75 and above are strong. Scores of 55 to 74 are promising but need refinement. Scores below 55 mean the hypothesis needs more work before building. The score is a starting point, not a verdict.

Question 4

Are these tools really free?

Accepted Answer

Completely free. No signup. No email required. No usage limits. I built them because founders make better decisions with real numbers. The only ask is that if you find them useful and want to build together, book a call.

Question 5

What is a good revenue target for a Validation MVP?

Accepted Answer

From an engineering standpoint, the Validation MVP is scoped to prove one thing. That users will pay. The metrics calculator helps you model what $500, $1,000, or $5,000 in monthly revenue looks like at different price points and churn rates. You can set a concrete revenue target before I write a single line of code. That target shapes what we build and what we cut.

Question 6

Can I use the cost estimator to compare building versus buying?

Accepted Answer

Yes. That is one of the best uses for it. If an off the shelf SaaS tool costs $200 per month, that is $2,400 per year. A custom built equivalent at $3,500 pays for itself in 18 months. You own it forever with no recurring fees, no vendor lock in, and full control over features. The estimator helps you run that math.

Question 7

What do I do after validating my idea?

Accepted Answer

Book a 20 minute scoping call. Bring your validation score, cost estimate, and any questions. I will review your results, flag any risks I see, and give you a written scope document within 24 hours if we are a good fit. No pressure. The call is just to see if it makes sense to work together.

SaaS Founder Toolkit

Validate Your SaaS Idea

Validate before you build

Tally

Stripe Payment Links

Notion

The modern B2B SaaS stack

Supabase

Vercel

Resend

Upstash Redis

PostHog

Guides built from real experience

How to Validate a B2B SaaS Idea

Stripe Subscriptions in Next.js

Kanbi Board Case Study

Services & delivery manifest

The B2B SaaS scope doc template

Get Your MVP Built in 14 Days

Toolkit Questions