Build models
Create forecasts, budgets, scenarios, tables, formulas, charts, and summaries from a plain-English request.
For finance and FP&A teams
Your AI spreadsheet expert
Derek builds models, runs analysis, fixes messy workbooks, explains formulas, and finds answers across every spreadsheet your finance team can access.
FY26 Forecast
ABCD
1ScenarioQ1Q2Q3
2Base$18.4M$21.1M$24.8M
3Upside$20.2M$23.7M$28.5M
4Downside$16.9M$19.2M$21.6M
5Variance+6.2%+8.8%+13.1%
Derek
Build a three-scenario forecast from this workbook and explain the Q3 variance.
Reviewing formulas and assumptions
Done. I built Base, Upside, and Downside scenarios, added a variance summary, and traced the Q3 increase to expansion revenue plus lower churn.
The coworker every analyst wants
Give every finance analyst the best spreadsheet person you know
Every finance team has someone who can untangle any workbook: the person who knows the formulas, fixes the model, builds the forecast, and explains the answer clearly.
Derek gives that level of spreadsheet help to the whole team, whenever they need it. Ask Derek to take on the workbook work, then spend your time on the business judgment that actually matters.
What Derek handles
Spreadsheet work, done with you
Run analysis
Ask what changed, what drove variance, which assumptions matter, and what the model says about the business.
Fix workbooks
Clean messy files, repair formulas, standardize formatting, restructure tabs, and flag inconsistent logic.
Explain formulas
Understand model structure, drivers, linked sheets, source ranges, and calculation chains without spelunking cell by cell.
Find files
Search across shared spreadsheets by meaning, not just filenames, folder names, or exact keywords.
Trace numbers
Follow important figures back to the workbook, sheet, cell, formula, linked file, and version behind them.
Derek's superpower
Spreadsheet expertise, with organizational memory
The best human expert can help with the workbook in front of them. Derek can also understand the spreadsheet history of your organization: old forecasts, budget versions, board models, compensation plans, linked workbooks, and one-off analyses buried in shared folders.
01Find the forgotten model
Ask for the analysis you need, even when nobody remembers the filename.
02Trace linked calculations
Follow a reported number through formulas, ranges, files, and versions.
03Reuse prior work
Surface earlier methodologies and adapt them to the analysis in front of you.
Where Derek works
Use Derek wherever spreadsheet work happens
Derek for Excel
A native add-in for teams who work in Microsoft Excel. Build, edit, explain, and debug spreadsheet work beside the active workbook.
Derek for Google Sheets
A Sheets add-on that reads the active spreadsheet, retrieves exact cells and formulas, and makes grounded edits.
Derek Web App
Search, analyze, compare, and trace spreadsheets across the organization from a dedicated workspace.
Series B software company
Board reporting prep with traceable forecast outputs
Multi-entity services company
Cleaner budget submissions before consolidation
Corporate finance team
Model version review in minutes instead of side-by-side inspection
Finance-grade trust
Answers you can verify
Permission-aware access
Cell-level citations
Auditable activity
Bring Derek to your finance team
Give every analyst an expert spreadsheet partner for the work that slows them down.
Request a demo