Open-Source Financial Modeling Library
Composable building blocks for financial models in TypeScript
Overview
A TypeScript library providing composable functions for DCF analysis, comparable company analysis, and LBO modeling. Designed for developers who build financial tools.
Problem
Most financial modeling happens in Excel with no version control, testing, or reusability. Developers building fintech products end up re-implementing the same formulas.
Approach
Created a well-typed, tree-shakeable library with pure functions for common financial calculations. Added comprehensive test coverage and documentation with real-world examples.
Outcome
500+ GitHub stars. Adopted by 2 fintech startups for their internal tooling. Published to npm with 3K+ monthly downloads.
Learnings
Open-source adoption is driven by documentation quality more than code quality. The projects that grew fastest had the best README and examples.