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Boldin vs cFIREsim: catalog facts
Boldin	cFIREsim
Freemium Can be tried for free, with additional features to unlock; prices are not stated here.	Free Free to use in the browser.
Web	Web
Detailed modelling of taxes, income, property and healthcare What-if scenarios and Monte Carlo analysis	Tests withdrawal plans against historical data Runs in the browser with nothing to install
Cloud service that holds your financial data Oriented toward US retirement rules	Focused on US retirement planning Detailed tax modelling lives on the separate FIREproof site
Web application, Hosted service	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.