Custom Estimating Software, Built From the Spreadsheet You Already Have
Your workbook already knows how you bid. Our AI agent Leonardo turns it into a database-backed estimating app with one live version, locked cost tables, and a full audit trail. In days, not quarters.
The most expensive file in your company is named Final_v3_REVISED.xlsx
A bid goes out Thursday. On Friday you find out it was built on Final_v3_REVISED.xlsx, which still carried last month's steel prices. The margin you thought you had was never there.
Or the one estimator who understands the markup macro is on vacation, and a tender closes Tuesday. Or a formula silently dropped a row from the BOQ and nobody caught it until the job was costed. That single skipped line was a five-figure hole.
When 2 to 10 people touch the same workbook, this is the normal state of things. Cell references break. Someone sorts a range and detaches the unit costs from the line items. The change order tab and the master tab drift apart. Every estimator has a private copy "just in case," which means there is no master at all.
The workbook was the right tool when one person estimated three jobs a month. At today's volume it is a liability with a familiar file icon. The same failure pattern shows up wherever a spreadsheet quietly became infrastructure; we wrote about the fragile-intake version of it in turning fragile lead forms into robust estimating engines.
What custom estimating software actually needs to do
Strip away the demo gloss and an estimating team needs five things a shared workbook cannot provide.
One live version
Every estimate lives in a database. No copies on desktops, no _v3, no _REVISED. What the PM sees is what the estimator built, always current.
Locked cost tables
Unit costs, labor rates, and markup tables update in one place, on a schedule, by someone with permission to do it. A bid can never pick up stale steel prices again.
Per-line-item audit history
Who changed the excavation quantity, when, and from what value. When a number looks wrong on bid day, you trace it in seconds instead of interrogating the office.
Quote PDF generation
A clean, branded quote produced from the live estimate at the press of a button. Line items, allowances, and exclusions pulled straight from the data, never retyped.
Roles that match the org chart
Estimators build. PMs view and track against actuals for job costing. The owner sees margin across every open bid. Nobody edits a formula by accident, because nobody edits formulas at all.
Your workflow, guided
Takeoff to BOQ to pricing to review to submission, with change orders handled as first-class records instead of a tab someone remembers to update.
From workbook to working app, with Leonardo
Your spreadsheet already encodes your process: the assemblies, the unit costs, the markup logic, the ugly exceptions that make your bids yours. Leonardo, our AI coding agent, reads that structure and builds the application around it. The logic stays. The container changes.
Upload your estimating spreadsheet
Drop your workbook into excel-to-app. Macros, linked tabs, and all. The messier it is, the more it tells us about how you really work.
Leonardo maps the logic
Cost tables become database tables. Formulas become calculations that run the same way every time. The BOQ structure, markup rules, and change order flow are preserved, then hardened.
You review a working draft in days
Run a real bid through it side by side with the workbook. Where the numbers disagree, we find out which one was wrong. Often it was the spreadsheet.
Go live, keep iterating
Roles, audit trail, and quote PDFs from day one. When your process changes, you tell Leonardo in plain language and the software changes with it.
The full walkthrough of the conversion process is in the Excel to App master guide.
You have three other options. Here is why teams keep bouncing off them.
Vertical SaaS estimating tools
Built for an average contractor who does not exist. Per-seat pricing that punishes you for adding a PM. Your markup structure gets bent to fit their fields, and the assemblies you spent ten years refining get flattened into their template.
Airtable-style no-code tools
A spreadsheet with a nicer skin. Fine for a contact list, but multi-tab BOQ math, conditional markup tables, and change order workflows push these tools past what they were designed to carry. You end up rebuilding your workbook, badly, inside someone else's grid.
Traditional custom development
The right result at the wrong price. Six figures, six months, and a spec document nobody can verify until the money is spent. That math made sense for nobody under $50M in revenue, which is exactly why you are still on Excel.
Leonardo changes the third option's economics. Custom software, generated from your own spreadsheet, at a price you can read today on our pricing page.
Custom estimating software, answered
What does custom estimating software cost with LlamaPress?
A fraction of traditional custom development. Because Leonardo generates the application from your existing spreadsheet, you skip the six-figure agency engagement. Current plans are listed on our pricing page, and there is no per-seat penalty for adding estimators or PMs.
How long until we can run a real bid through it?
A working first version typically lands within days of uploading your workbook. Most teams run their first live bid through the app within the first couple of weeks, alongside the spreadsheet, before cutting over fully.
Can it keep our formulas and markup logic?
Yes. That is the whole premise. Your unit cost tables, assembly buildups, markup tiers, and rounding rules are translated into database logic that produces the same numbers, then verified against your workbook on real bids before you switch.
What happens to our historical estimates and job data?
Historical estimates, cost libraries, and job records import into the new database, so past bids stay searchable and job costing comparisons carry forward. Nothing is left stranded in old files.
Who owns the software and the data?
You do. The application is yours, built on standard open technology (Ruby on Rails and PostgreSQL), running on your own instance. Your data exports whenever you want it, and you are never locked into a proprietary format.
Still comparing your options? Our teardown of what free spreadsheets really cost as you scale applies to estimating workbooks just as much as rent rolls.
Your next bid deserves better than v3_REVISED
Upload the workbook your team fights over. Leonardo will show you what it looks like as real estimating software, with your logic intact.