Open-source · CC0 1.0

The fintech info you need

Guides, financial models, and policy templates for fintech founders. Everything here is free, public-domain, and improving every week.

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Guides

Start here

All guides

Guide

Go to market guide

A list of questions to answer in order to launch a fintech product within one year.

Guide

Guide to starting a challenger bank

A comprehensive guide covering processors, bank partners, card partners, and product features for challenger banks.

Guide

How to launch a card product

Tactical and strategic advice on bringing a card product to market.

All guides

Models

The math, in a spreadsheet

Open Google Sheets templates for fintech product economics. Interactive versions are coming to Tools.

01 / 03 Bank Account Economics Model
Build-your-own deposit account unit economics — model net interest income, debit interchange, monthly fees, and per-account servicing cost across checking and savings products.
02 / 03 Credit Card Economics Model
Build-your-own credit card unit economics — model revolve rate, APR, interchange, charge-offs, cost of funds, and rewards costs across credit and charge card products.
03 / 03 Term Loan Economics Model
Build-your-own fixed-term loan portfolio model — per-loan IRR, charge-offs, cost of funds, and net interest margin for installment lending.

Open source

Yours to use, fork, and improve.

All content is released under CC0 1.0 — no rights reserved. If something is missing, wrong, or just unclear, open a pull request or drop us a line.

Roadmap

What we're building

A living catalog of everything in scope. Some items are published. Others are planned, drafting, or linked to external authoritative sources. Each section's planned work is tracked as a GitHub issue, so you can pick something up or suggest an addition.