ModelxcelPro is the Excel add-in built for power financial modelers. Bind sources, sign formulas, and prove every number with evidence that travels with the workbook and can be packaged for audit handoff.
One install · every capability · no per-feature upsell
Why this matters
Spreadsheet risk is not theoretical.
Field audits aggregated by Raymond Panko (University of Hawai'i) found errors in 88–94% of spreadsheets audited — and a Tuck School of Business audit of 50 operational spreadsheets found individual error impacts up to $100 million.
Six capabilities. One install.
Every capability ships in every plan. Tiers differ on seats, admin tools, and support — never on features.
Bind Source, Sign Cell, Sign Block, Verify Ledger, Seal Ledger, Why This Number, Replay Proof, Proof Coverage, Export Certificate, Evidence Pack. Cryptographic proof of derivation stays with the workbook.
Learn moreModel Health Report, Circular Refs, Model Sentinel, Review Issues Tracker, Flag Cell, Audit Trail, and Cell Search by attribute. Sidecars such as .mxchecks, .mxbreaks, .mxreview, and .mxaudit keep review state beside the workbook across saves and handoffs.
Learn moreCalcScope explains the selected formula with live values, branch state, and no-write what-if sliders where eligible. Dock CalcScope follows selection in a read-only cockpit. TrustLens adds proof state and drift, with Trace, Sensitivity, and Name Conversion for the rest of the review loop.
Learn moreWorksheet Map and Risk Heatmap in three modes — Risk, Structure, Audit — with complexity scoring, all-sheets analysis, and an interactive legend panel.
Learn moreCompare Workbooks, Compare to Previous Version, Compare Sheets — formula-aware diff. Material Change Intelligence replays material drivers and explains the delta.
Learn moreSmart Format reads financial-model intent — "DSCR" maps to ratio, "WACC" to percent, "COD" to date, "exchange rate" to factor. Format Selection for precision. Format Sheet for scale. AutoFormat runs passively for eligible numeric and formula edits. Six workbook-persisted themes plus a custom designer set the standard once, then reuse it everywhere.
Learn morePlus dozens more across the six capabilities — keyboard shortcuts, settings panels, cloud-aware OneDrive / SharePoint handling, and more.
See every featureTHE MOAT
Three primitives, one promise. When the number changes, you know why — and you can prove it.
Pin every input to its source — URL, file, or prior workbook. SHA-256 hash. Drift detected the moment the source changes.
Attest individual cells or contiguous formula blocks. Every record chains to the prior one — append-only, tamper-evident, anchored in workbook custom XML.
Replay material drivers live through Excel, export Certificate JSON with a signed sibling envelope, or export the Evidence Pack — certificate, sealed ledger, and offline Node verifiers together.
Underlying engine: the Causality ledger. Every write is SHA-256(prior_hash || record). JSON certificate exports get the signed envelope; PDF and branded Excel certificates stay self-hashed, envelope failures warn instead of blocking export, seals cover records up to sealing time, and identity binding, timestamping, and revocation remain future work.
SMART FORMAT · THE WEBINAR MOMENT
Just type. We handle the rest. Format Selection for precision, Format Sheet for scale, and AutoFormat for eligible numeric and formula edits. This is how Excel should work.
Same Smart Formatting engine, three ways to invoke it: the selected range, the worksheet used range, or a debounced AutoFormat pass after eligible edits.
In the add-in
Three of the dozens of capabilities you get on day one.
WORKSHEET MAP
Worksheet Map
Three layered views — Risk, Structure, Audit
Demo comingTRUSTLENS
IF() branch actually fires today. A four-tab side panel breaks the formula down in plain English — "Condition X is FALSE, taking value_if_false branch" — alongside the active path, attestation state, and resolved reference values.TrustLens
Deep formula workbench with diagnostics
Demo comingMATERIAL CHANGE INTELLIGENCE
Material Change Intelligence
Diff with causal explanation
Demo comingBuilt for power modelers
Same product. Four flavors of pain it solves.
Review the model, explain what moved, and hand off evidence without hiding inside the spreadsheet.
Lead capability: Sign Formula Block
Alternatives guide
See how ModelxcelPro coverage maps against the categories teams usually combine: formatting add-ins, formula review tools, dependency tracing tools, workbook comparison tools, mapping and risk visualization tools, and audit handoff tools.
Source bindings, reviewer attestations, ledger verification, and certificates keep evidence close to the workbook.
Review capabilityCalcScope, TrustLens, Trace, Sensitivity, and Name Conversion support different levels of formula review.
Review capabilityWorkbook Comparison features connect changed cells, changed outputs, and driver explanations.
Review capabilityReview Issues, Audit Trail, Model Sentinel, Circular Refs restore records, Output Intelligence reports, and proof records turn findings into a durable workstream.
Review capabilityWhy now
Most spreadsheet models supporting nine-figure decisions can’t be re-justified six months later. ModelxcelPro fixes that with workbook-native cryptographic evidence instead of conventions.
Pricing
Pricing will be announced before paid checkout opens. Choose by seats, procurement, and support — not by add-in features.
Solo analysts, freelancers, small advisory.
Final pricing will be announced before paid checkout opens.
Deal teams, FP&A teams, modeling boutiques.
Final pricing will be announced before paid checkout opens.
Banks, audit firms, large infra developers.
One product, every capability. Buying paths differ by seats, procurement, and support — not by add-in features.
Resources
Notes on financial modeling, model risk, and the practice of building Excel models that hold up.
A practical guide to project finance undertakings, including SPV controls, permits, construction, reporting, ratios, cash controls, security and lender protections.
Explore how Islamic financing works in project finance, including murabaha structures, common terms frameworks, cash flow controls, security, and key considerations for sponsors.
A complete practitioner's guide to modelling price adjustments over time — from foundational concepts to advanced implementation techniques in project finance spreadsheets.
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