Built so engineers can trust the output, not just the marketing.

The browser calculator runs the canonical Python design engine in your tab via in-browser WASM. Your spec never leaves the machine. Open the calculator, get a full engineering report, leave — no account, no nag.

The codebase is free of viral copy-left in the core compute path. GPL-licensed solvers (FEMM, ngspice, Elmer) are invoked only as out-of-process subprocesses. You can vendor, fork, or ship MagAI inside a closed-source product without legal heartburn.

The design engine ranks parts across TDK, Ferroxcube, Magnetics Inc, Hitachi/Proterial, VAC, DMEGC, Acme, Micrometals, Elektrisola, Rubadue and more — you get the part that fits your spec, not the part that fits one supplier's catalog.

The 5-component trust score (energy balance · mesh convergence · reference benchmark · datasheet match · lab measurement) is part of every result and surfaced on the public preview pages. No hidden vendor numbers, no marketing efficiency — what the engine computes is what you see.

The AI assistant suggests sensible defaults, narrates BOM alternatives, drafts RFQ emails, and writes a trust report — but it never computes physics. All numbers come from the deterministic Python engine, so you can audit every value back to a citation.