Free Tools for SaaS & Ecommerce Founders
Calculators, comparisons, and explainers built for founders who need quick, honest answers - not another dashboard to sign up for.
SaaS
SaaS Metrics Reference
Every SaaS metric that matters, with its formula, benchmarks and the mistakes that corrupt it. MRR, ARR, churn, LTV, CAC, NRR, quick ratio, Rule of 40 and more.
SaaS Metrics Cheat Sheet
Decode every SaaS metric in plain English. MRR, ARR, churn, LTV, CAC, NRR - what each one means, how it's calculated, and why it matters.
SaaS Pricing Models
Flat-rate, tiered, per-seat, usage-based, freemium and hybrid - how each model works, who it suits, and what it does to your MRR, churn and retention.
SaaS Pricing Calculator
Model your pricing strategy before you commit. See how plan price, churn rate, Stripe or Paddle fees, and discounts affect your MRR and ARR.
Make Charts & Graphs with AI
Upload any CSV and let AI turn it into charts and graphs for free. Ask questions in plain English - no SQL, no setup.
SaaS Metrics Quiz
Think you know your SaaS numbers? Ten timed questions on MRR, churn, attribution and more - easy to hard, with a leaderboard for the fastest founders.
SaaS Health Score Calculator
Score your SaaS across churn, growth, conversion, revenue per customer, and runway. Get one honest number plus exactly which metric to fix first.
UTM Builder
Add UTM parameters to any link in seconds. Quick-fill presets for common channels, automatic lowercasing, and warnings before a naming mistake splits your reports.
MRR Screenshot Generator
Turn your MRR into a shareable card for build-in-public updates. Pick a background and color, add your numbers, and download a PNG - free.
Payments
Which Payment Provider Should I Use?
Answer 6 quick questions about your business and get your top 3 payment provider matches, ranked and explained.
Stripe Fee Calculator
Enter any transaction amount and instantly see Stripe's fee and your net payout. Supports standard and custom pricing, including international cards.
Paddle Fee Calculator
See exactly what Paddle takes from each transaction. Compare Paddle Billing and Paddle Classic fees across your subscription pricing.
Payment Fee Comparison
Compare processing fees side by side for Stripe, Paddle, Lemon Squeezy, Dodo Payments, PayPro Global, FastSpring, and more. Find the cheapest option for your revenue.
Ecommerce
Want analytics that go deeper?
Connect your Stripe, Paddle, Freemius, Polar.sh, Creem.io or Lemon Squeezy account and ask any question about your data - Chartsy turns it into a chart instantly.
Try Chartsy free
