Founder Tool Comparisons
Picking the right tool matters — but most comparison sites earn affiliate commissions from every option they review, which creates obvious bias. These comparisons are written to help you make the right choice for your business, with transparent disclosures on any affiliate links.
Payment processing
Stripe vs PayPal Fees — Interactive Comparison Calculator
Enter a sale amount and instantly see the fee and net payout for Stripe, PayPal Standard, PayPal Checkout, and Shopify Payments, ranked from most to least you keep.
Stripe vs PayPal vs Shopify Payments — Fee Comparison
Which payment processor costs less for your business? Side-by-side fee tables across domestic and international transactions, subscription billing, and Shopify stores. Includes worked examples at $50, $100, and $500 transaction sizes.
SaaS analytics
Baremetrics vs ChartMogul vs ProfitWell
Which MRR/churn analytics tool should you use? Full comparison on pricing (ChartMogul is free up to $10k MRR), features, integrations, and which tool is right at each ARR stage from pre-revenue to $100k+ MRR.
Freelance tools
Bonsai vs FreshBooks vs Invoice Ninja
Which invoicing and contract tool is best for freelancers? Covers pricing, features, payment integrations, and the key differentiators: Bonsai for contracts, FreshBooks for accounting, Invoice Ninja for budget-conscious solos.
All calculators on FounderCalc are free and run entirely in your browser — browse all 105 tools →