The what-if machine your spreadsheet wishes it was.
Move a slider, watch every output recalculate — P&L, monthly cashflow, IRR, sensitivity. Save to a draft revision when it's right, revert when it isn't.
- ✓All parameters editable with live recalc and delta chips vs draft
- ✓Solver finds the optimal plan under your funding covenant
- ✓The AI Operator drafts proposals — you accept with receipts
From deal brief to IC decision — one workbench
Every number is a formula, every formula is verified, and every change carries a receipt.
Assumptions on the left. Everything else reacts.
25+ live parameters — pricing, costs, pace, land, financing, tax — with sliders for the big levers. The KPI strip, statements and a full outputs rail recalculate as you drag, with deltas against your saved draft.
Open the workbench →An AI analyst that shows its work — and asks permission.
Ask it to stress construction +10% or draft a conservative variant. It runs the real engine, cites the exact cells, and files a proposal. Nothing touches your draft until you accept — every action lands on the audit chain.
See the Operator console →The workbook your lender opens is the model you built.
Exports are formula-driven with defined names — open in Excel, change a cell, and the whole model recalculates. A HyperFormula gate re-derives every cell before export; a LibreOffice oracle verifies weekly.
See the verification proof →Your Excel export recalculates. We prove it.
Every workbook is formula-driven — no pasted values. Before it leaves the platform, it passes an independent recalculation gate and a LibreOffice oracle. The worst case we allow: a correct pinned value that doesn't recalculate. Never a wrong formula that does.
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BlackSigma is invite-gated for underwriting desks. Tell us where you work — we onboard one desk at a time.