Free calculators for Next.js founders
Free, no-signup calculators for the buying decisions adjacent to picking a Next.js boilerplate. Honest defaults, editable rates, transparent math — useful regardless of whether you buy from us.
All free tools
Stripe vs Paddle vs Polar checkout fee calculator
This calculator estimates monthly checkout fees for three common payment providers — Stripe (raw processor), Paddle (Merchant of Record), and Polar (Merchant of Record) — based on your transaction count, average order value, and each provider's percentage and fixed fees. All rates are editable so you can plug in current pricing.
Open the calculatorNext.js boilerplate build-vs-buy cost calculator
This calculator estimates the cost of building common SaaS modules (auth, billing, multi-tenant tenancy, RAG pipeline, multilingual marketing) from scratch versus buying a pre-built template. Plug in your developer hourly rate and the modules you need; the output compares total dev-hour cost to the SaaSForge template prices.
Open the calculatorSee pricing. Pick a template.
Four SaaSForge templates, $59 to $259, one-time purchases.