This is a client-side comp calculator that runs entirely in your browser. Enter your current package, add an offer if you have one, and get a weighted verdict: net gain after walk-away cost, branch compare for three futures, negotiation levers from your grant structure. The equity math runs in your browser. See the privacy page for what data is collected.

What you get

Walk-away cost: unvested value you forfeit by leaving now
Your number: minimum offer total that beats staying
Golden exit windows: periods when walk-away cost drops to its minimum
Branch compare: three futures side by side (take now / counter / wait for cliff)
Negotiation levers: deterministic asks based on your actual grants
Handcuff decay: unvested value unlocking over time

How it stays private

The calculator is pure client-side JavaScript. The equity math engine is deterministic TypeScript with zero dependencies. The math itself runs entirely in your browser. Your comp data stays in your browser's memory and its local storage. It is never sent anywhere to compute your verdict. Completing a comparison does send one signal (that a verdict was computed, plus its kind, no comp numbers) so we can tell the calculator is being used. See the privacy page for the full picture. If you activate the optional AI advisor, that choice is explicit and disclosed before sending anything.

Built for engineers with equity

The calculator handles RSUs, ISOs, NSOs, and share grants with arbitrary vesting schedules. It understands cliffs, monthly vesting, refreshers, sign-on grants with clawback, and underwater options. Startup equity gets a risk discount you control. Private-company equity is labeled as such, never silently blended with liquid value.

Use it before you have an offer

You do not need an offer to get value. Enter your current package and the calculator shows what leaving costs, when exit windows open, and what minimum offer total beats staying. Most people do not know these numbers until they are already negotiating. By then it is too late to time your exit or ask for the right make-whole.

Shareable scenarios, and share cards with banded values.

The calculator generates share cards and shareable URLs, and they are not the same thing. The share card text shows banded ranges, never exact dollar amounts, so you can discuss the verdict without exposing your actual comp. The share URL carries a banded summary only, never exact dollar amounts. Opening it on another device will not reload your numbers. Those stay in this browser's local storage. Full details on the privacy page.

What this is not

The calculator is not a public listings board. Using it does not show you to companies. A later opt-in is what would make you visible. Accept is the only reveal.

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