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missumai
#37Finance· launched Oct 2025

CountryTaxCalc

Compare income tax and take-home pay across 111+ countries and every US state.

Visit countrytaxcalc.com

What it is

A free tax calculator site with 2,000+ pages. Its builder audits every page against official government sources after finding early AI-written data was wrong.

How it was built with AI

A first-time builder says the whole site was "built with AI"; he later connected Claude Code to Google Search Console via an MCP to plan content.

  • Claude Code

Traction

Self-reported

40K+ monthly users, 99K Google clicks and about $1,000 a month in ad revenue

As of Oct 15, 2026. Stated by the founder or the tool maker. Not independently verified. Read the source

Sources

  1. Builder post on XX (@danielkbuilds) · Oct 15, 2026 · checked Oct 20, 2026