The full index
Every tool, comparison, and cost study in one place
Working calculators and independent data studies. No vendor marketing: just the math, source links, and the date each dataset was last checked.
- Live calculators
- 12
- Guides & studies
- 12
Calculators
Free, no sign-up. Each one exposes the fees and token math the vendors bury.
LLM API Cost Calculator
Compare GPT-5, Claude, Gemini, Llama, and Mistral side-by-side. Token-level precision for input, output, and context caching.
Open calculator →AI Cost-per-Task Calculator
Stop guessing tokens. Pick a workload (chatbot, RAG, agent, batch, summarization, code) and see real monthly cost across every major LLM.
Open calculator →Self-Host vs API Breakeven
At what monthly volume does running your own GPU beat paying per-token? Modeled for A100, H100, and consumer-tier hosts.
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Stripe True Fee Calculator
Every Stripe fee surface — base rate, international card surcharge, currency conversion, dispute fees, monthly minimums. Country-aware.
Open calculator →Wise vs PayPal vs Revolut
Live mid-market FX, updated daily. True all-in cost across 8 providers — fees, FX spread, arrival time.
Open calculator →NZ GST Calculator
Inclusive / exclusive GST, IRD filing logic, and edge cases for cross-border digital sales into New Zealand.
Open calculator →
Subscription Audit Calculator
Drop in your SaaS stack and team size — outputs total annual spend, per-seat cost, annual billing savings, and a stack score.
Open calculator →LTV / CAC / Churn Breakeven
The three numbers every operator quotes, modeled together honestly.
Open calculator →Annual vs Monthly Billing Breakeven
The 20% annual discount is rarely worth it once you account for churn risk. We do the math.
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Shopify True Cost Calculator
Plan + Apps + Transaction fees + Payments fees + Currency conversion — what you actually pay every month.
Open calculator →Landed Cost Calculator
Product + shipping + duty + insurance + customs broker — what a unit really costs to land on your shelf.
Open calculator →Break-Even ROAS Calculator
The exact return on ad spend an order must beat to break even — after COGS, payment fees, shipping, and returns, plus your max CAC.
Open calculator →
Guides & data studies
Long-form explainers and independent research — the hidden traps, the real math, and citable data you won't find on a vendor's pricing page.
2026 LLM API Pricing Study: Real Cost Per Task
Independent data study pricing one identical task across the current LLM dataset, ranked from cheapest to most expensive with transparent methodology and source links.
Read →How Much Does It Cost to Run an AI Chatbot?
Real 2026 monthly cost of running a production AI chatbot — model choice, prompt caching, conversation length, and the mistakes that triple your bill.
Read →How Stripe Fees Actually Work for SaaS
The real effective Stripe rate for subscription businesses — Billing fees, the fixed-fee drag on cheap plans, involuntary churn, and international surcharges.
Read →The True Cost of a Shopify Store in 2026
Beyond the plan price — the third-party gateway double-charge, app debt that scales with traffic, the plan-upgrade breakeven, and the fees you eat on every refund.
Read →Wise vs PayPal for Business: Which Actually Wins
Not 'which is cheaper' but which role each plays — the PayPal convenience tax, the double FX markup, account-freeze risk, and the Wise feature that lets overseas clients pay you like a local.
Read →QuickBooks vs Xero: True Cost by Team Size
The user caps QuickBooks doesn't headline and the invoice limit on Xero's cheap plan — the cheapest plan that genuinely fits a team of 1, 3, 5 and 10, computed from current published pricing.
Read →How to Audit Your SaaS Stack From Invoices
An invoice-based audit for inactive seats, unnecessary plan tiers, functional overlap, annual-billing breakeven, and renewal ownership.
Read →How to Cut Your AI API Costs 50%+ Without Losing Quality
The seven levers that actually reduce LLM API spend — model tiering, prompt caching, batch, output control, lean RAG — with a decision framework and a worked example. Vendor-neutral, operator-tested.
Read →The Real Cost of Cross-Border Payments
The three cost layers that decide what crossing a border actually costs — card processing, transfer fees, and the hidden FX markup — with a worked example and how to cut all three.
Read →Shopify vs WooCommerce: True Monthly Cost Compared
Both platforms priced all-in at $5k, $20k and $100k/month revenue — plan fees vs hosting, apps vs extensions, identical card rates, and the maintenance line every comparison post leaves out.
Read →The Ecommerce Profit Playbook: Why Revenue Isn't Profit
The seven-layer cost stack between a sale and a profit — COGS, payment fees, platform + app debt, shipping, returns, and ad spend — with a worked example and breakeven-ROAS math.
Read →The 2026 Stripe Global Fee Index
An independent, citable data study ranking Stripe's real card-processing cost across 18 markets, with source-linked rates and a verification date.
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