For wealthtech & fintech builders
Ship planning features without
owning a calculation engine
Retirement projections, rent-vs-buy, equity comp, debt strategy — your roadmap needs them, your users expect them, and building each one correctly (then re-verifying it every tax year) is unglamorous, high-liability work. Worthune is that engine, already built and already verified.
A contract your compliance team can read
Every model publishes its spec — inputs, units, domains, formulas, assumptions, exclusions. Responses pin their specVersion, and changes go through a public changelog. Nothing shifts under your feature.
Verification you don't have to build
An independent second implementation must reproduce each model exactly — 6,750 checks, green on every change. When we find a bug, the fix ships spec-first and versioned. That's QA you're not staffing.
Tax-year maintenance included
IRS limits, brackets, SSA factors — sourced, dated, and cited in every response. When Washington moves the numbers, we move the registry. Your integration doesn't change.
One POST per computation
Stateless JSON, no keys, deterministic outputs. Want guarantees on both sides of the wire? Pin the machine-readable contract in your CI.
// e.g. inside your planning feature
const res = await fetch(
"https://worthune.com/api/v1/models/roth-vs-traditional",
{ method: "POST",
headers: { "content-type": "application/json" },
body: JSON.stringify(userInputs) },
);
const { ok, outputs, specVersion, facts } = await res.json();
// outputs.breakEvenTaxRate, outputs.yearlyGrowth[...]
// facts: IRS constants used, with sources — show them to users