Muon – Free financial model sandbox for AI startups and projects

Summary: Muon is a free, browser-based financial sandbox that simulates AI API costs, infrastructure expenses, and profitability to help users track runway and cash flow without complex spreadsheets or ERP systems.

What it does

Muon lets users select AI models, estimate traffic, and calculate monthly bills. It simulates discrete financial events like hiring or ad spend and provides real-time burn rate and runway estimates.

Who it's for

It is designed for indie developers, CTOs, and AI startup teams needing a lightweight tool to model costs and profitability without login or data uploads.

Why it matters

Muon simplifies financial forecasting for AI projects by replacing manual Excel tracking with an interactive, privacy-focused simulator running entirely in the browser.