Updated September 2026
As of this writing, replacing a spreadsheet with a custom web app costs between $2,000 and $250,000, depending on who builds it. A no-code builder charges per user instead: 15 users x $20 on Airtable's Team plan is $300 a month, or $10,800 over 36 months. An AI-built custom app from LlamaPress starts with a $2,000 build sprint, then hosting from $9.99 a month with no per-user fees. A freelance developer quotes $10,000 to $50,000, and a traditional agency quotes $40,000 to $250,000. The AI route is cheaper because the discovery work is already done: your spreadsheet is the spec.
In short
- A no-code builder is the cheapest way to start, and it charges per user forever: 15 Airtable Team seats cost $10,800 over three years.
- An AI-built custom app from LlamaPress starts at a $2,000 sprint plus hosting from $9.99 a month, with no seat fees.
- Freelancers quote $10,000 to $50,000. Agencies quote $40,000 to $250,000, and most of that fee pays for discovery.
- Price moves with the tabs that hold records, the formulas, the users and roles, integrations, phone use, reports, and data migration.
- Upload the spreadsheet at /excel-to-app and you can have a scoped, fixed-price quote in one day.
I spent years at McKinsey putting numbers on operational decisions like this one. Now I sit with owners of contractors, distributors, and service firms who run the business on one spreadsheet. Every one of them wants two numbers: what the replacement costs, and what the spreadsheet costs them today. Our team has converted more than 400 spreadsheets into apps, so the figures below come from real quotes. Where I multiply, I show the inputs.
How much does it cost to build a custom web app to replace a spreadsheet?
Four routes exist, and each has its own price shape. The no-code route is a subscription. The other three are a build fee up front, then hosting.
No-code builder, priced per user. Airtable, Power Apps, and AppSheet let you rebuild a spreadsheet as an app without a developer. You pay for every user every month. As of September 2026, Airtable's Team plan is $20 per user per month billed annually. Fifteen users x $20 is $300 a month, which is $10,800 over 36 months (arithmetic). Microsoft lists Power Apps Premium at $22 per user per month paid yearly, so 15 users cost $330 a month. The tool is cheap to start and gets expensive as the team grows. You also build the app yourself. We compared the main tools in the best Excel to web app converters in 2026.
AI-built custom app. This is the route we sell, so weigh my view with that in mind. At LlamaPress, a done-for-you build sprint starts at $2,000. After the build, the app runs on a hosted plan from $9.99 a month, with no per-user fees. Fifteen users cost the same as three. The code is a standard Ruby on Rails app in your own GitHub account, and a human engineer reviews every build. You can upload the spreadsheet and see a first version before you pay anything. Build pricing is on the services page.
Freelance developer. A freelancer building a modest internal app quotes $10,000 to $50,000 and takes two to four months. Quality depends on the individual. You will spend hours explaining the spreadsheet before they write a line of code.
Traditional agency. An agency quotes $40,000 to $250,000 and takes three to nine months. Much of that fee pays for discovery workshops, wireframes, and a project manager. For generic custom-app cost bands and the ownership questions to ask any vendor, read our guide to what custom apps for business cost.
The one-sentence reason the AI route costs less: discovery is already done, because the spreadsheet is the spec. Your columns are already the data model, and your formulas are already the rules. An agency spends weeks pulling that out of your staff in workshops. Leonardo, our coding agent, reads it from the file. If you have not yet decided to replace the spreadsheet, start with should you rebuild your Excel workbook as software or keep using Excel.
What drives the price up or down?
Seven things move the price on every route. Tabs that hold records matter most, because each one becomes a table with its own screens. Formulas matter next, because every rule has to be rebuilt and tested. The other five add work in smaller steps.
| Driver | Keeps the price low | Pushes the price up |
|---|---|---|
| Tabs that hold records | 1 to 3 tabs such as Orders, Customers, Products | 8 or more tabs with VLOOKUPs between them |
| Formulas and rules | Sums, lookups, a few IF statements | Hundreds of nested formulas, VBA macros, approval rules |
| Users and roles | One team, one role, under 10 people | Client logins, field staff, 4 or more roles with different views |
| Integrations | None, or a CSV export | QuickBooks, email, SMS, card payments |
| Phone use | Desk only | On-site use on phones, offline, photo uploads |
| Reports and PDFs | On-screen lists and filters | Branded PDF quotes, scheduled emailed reports |
| Data migration | A few hundred clean rows | Years of history across tabs with duplicates to clean |
Two drivers surprise people. Client logins cost more than staff logins on a no-code builder, because vendors sell them as a separate seat type. Formulas also cost more there, because each builder has its own formula language and someone rewrites every rule by hand.
Three worked examples with a price on each route
Each example below names its drivers, then gives the band on every route.
1. Estimating spreadsheet for a 12-person contractor
The file has four tabs: Rates, Labor, Materials, and Quote. The Quote tab holds about 300 formulas that pull unit rates, apply markup by job type, and total the bid. Twelve people use it in two roles: estimators build quotes, and the owner approves anything over $50,000. The output is a branded PDF quote. Drivers: heavy formulas, two roles, PDF output, and a small migration. No-code builders struggle here, because all 300 formulas need rewriting by hand. On the AI route, expect one to three build sprints starting at $2,000 each. A freelancer lands in the middle of the $10,000 to $50,000 band, and an agency at the low end of $40,000 to $250,000. We rebuilt this kind of spreadsheet for RSB, a steel contractor, in six weeks: estimates 62% faster, at 40% lower cost per estimate.
2. Inventory and order tracker for a distributor with 8 users
Three tabs hold records: Products, Orders, and Stock Movements. Formulas are light: stock on hand is receipts minus shipments, and a reorder flag fires below a minimum. Eight users work in three roles: warehouse staff, sales reps, and the owner. The warehouse wants to update stock from a phone, invoices need to reach QuickBooks, and customers want a shipping email. Migration is three years of orders, about 9,000 rows. Drivers: users and roles, phone use, two integrations, and a moderate migration. A no-code builder is a real option here. AppSheet Core is $10 per user per month, so 8 users x $10 is $80 a month (arithmetic), and AppSheet runs offline on phones. On the AI route, expect one sprint for the tracker and a second for QuickBooks and email. Freelancers and agencies land at the low end of their bands. For a head-to-head on this case, see Glide vs Softr vs Airtable vs a custom build.
3. Client onboarding checklist for an MSP with 3 staff and 40 clients
One tab, Clients, has 40 rows and about 35 checklist columns: contract signed, admin credentials received, backups configured, and so on. A COUNTIF per row gives percent complete. Three staff edit the sheet, and 40 clients want to see their own row and upload documents. That client login is the main driver, with reminder emails and a tiny migration behind it. On a no-code builder, 40 client logins push you to a plan with client seats, such as Softr Pro at $99 a month. On the AI route, one sprint covers the checklist, the client portal, and the reminder emails. A freelancer lands at the low end of $10,000 to $50,000. Few agencies take a job this small, and the ones that do quote near $40,000.
What does it cost to run afterwards?
A custom app from LlamaPress runs on a hosted plan. As of September 2026, Starter is $9.99 a month, Pro is $21.99, and Business is $54.99. Yearly billing brings those to $7.99, $17.59, and $43.99. None of the plans charge per user, and the table below shows what that means for a 15-person team.
| Route, 15 users | Per month | 36 months | Build fee | 3-year total |
|---|---|---|---|---|
| Airtable Team, billed annually | 15 x $20 = $300 | $10,800 | $0, you build it | $10,800 |
| Power Apps Premium, paid yearly | 15 x $22 = $330 | $11,880 | $0, you build it | $11,880 |
| AppSheet Core | 15 x $10 = $150 | $5,400 | $0, you build it | $5,400 |
| LlamaPress Pro hosting + one build sprint | $21.99 flat, any user count | $791.64 | $2,000 | $2,791.64 |
All figures are list prices as of September 2026 and every 36-month number is arithmetic (monthly price x 36). Sources: Airtable pricing, Microsoft Power Apps pricing, Google AppSheet pricing, and our own pricing page.
Read the table fairly. The no-code rows assume you build the app yourself and the spreadsheet fits the tool's limits. The LlamaPress row assumes one sprint, and a bigger spreadsheet needs more. Even at three sprints, the custom total is 3 x $2,000 + $791.64 = $6,791.64 (arithmetic), still below the 15-seat Airtable total. AppSheet Core at $10 per user stays cheap for a small team with a simple spreadsheet.
What does staying in Excel cost?
Staying put has a price too, and most owners have never written it down. Count the hours per week your team spends re-keying data between the spreadsheet and other systems. Add the hours spent reconciling copies and hunting for the latest version. Multiply by a loaded hourly rate, then by 52. As an illustration with made-up inputs, 2 people x 3 hours a week x 52 weeks is 312 hours. At $40 an hour, 312 hours is $12,480 a year (arithmetic).
Then add error exposure. Ray Panko's research at the University of Hawaii found errors in 91% of the 54 operational spreadsheets audited in field audits since 1997. Panko also reports cell error rates between 0.38% and 2.5%. A Quote tab with 300 formulas would therefore hold roughly 1 to 8 wrong cells (arithmetic: 300 x 0.0038 and 300 x 0.025). On a $400,000 bid, one wrong cell costs more than any route in the table above.
When is a $0 fix inside Excel the right answer?
Sometimes the right quote is zero, and I would rather say so than sell a sprint. One person using the spreadsheet once a week should keep the spreadsheet. A team whose only pain is people overwriting each other can move the file to OneDrive or SharePoint and turn on AutoSave. Microsoft's co-authoring needs both. Intake problems often need a free Google Form or Microsoft Form that appends rows to the sheet. A process that changes every month should settle before anyone builds software around it. A custom app earns its cost where several people run a stable process many times a day and a wrong cell has a dollar figure.
How do I get a real quote in one day?
Upload the spreadsheet at /excel-to-app. The upload is free and needs no credit card. Leonardo reads every tab, column, and formula and produces a first working version. Your rows become real records in a PostgreSQL database, your team gets logins, and each tab becomes a screen. You click through that first version the same day.
Then a LlamaPress engineer compares the first version with what your team needs: the approval step, the QuickBooks link, the PDF quote. That gap is the scope. You get a fixed-price sprint quote, starting at $2,000, before any money changes hands. The code lives in your GitHub account from the first commit. For what happens to each tab and formula, read how to convert your Excel spreadsheet to a web app without rebuilding from scratch.
Get a real price from the spreadsheet you already run.
Upload the file that runs your estimating, orders, or onboarding. Leonardo builds a first version, an engineer scopes the rest, and you get a fixed price with no seat fees.
Prefer to talk first? Contact us and we will look at your workbook with you.
Frequently Asked Questions
How much does it cost to build a custom web app to replace a spreadsheet?
As of this writing, an AI-built custom app from LlamaPress starts at a $2,000 build sprint plus hosting from $9.99 a month. A freelance developer quotes $10,000 to $50,000 for the same spreadsheet. A traditional agency quotes $40,000 to $250,000. A no-code builder charges per user instead, so 15 users on Airtable Team cost $300 a month.
How much does a custom app cost per month?
A custom app from LlamaPress costs $9.99, $21.99, or $54.99 a month to host, depending on the plan, as of September 2026. Yearly billing lowers those to $7.99, $17.59, and $43.99. The hosting price stays the same whether 3 people or 30 people log in. The one-time build sprint is separate and starts at $2,000.
Is a no-code tool cheaper than a custom app?
A no-code tool is cheaper in month one and usually more expensive by year three for a team of 10 or more. Fifteen users on Airtable Team cost $10,800 over 36 months, while a $2,000 LlamaPress sprint plus Pro hosting costs $2,791.64. A no-code tool stays cheaper for a small team with a simple spreadsheet, such as 8 users on AppSheet Core at $80 a month.
What does LlamaPress charge to convert a spreadsheet?
LlamaPress charges nothing for the first version. You upload the spreadsheet at /excel-to-app and Leonardo builds a working app you can click through the same day. A done-for-you build sprint to finish the app starts at $2,000, quoted as a fixed price after an engineer scopes it. Hosting after that starts at $9.99 a month.
Do I pay per user?
No. LlamaPress hosted plans have no per-user seat fees, so a 15-person team pays the same flat monthly price as a 3-person team. No-code builders such as Airtable, Power Apps, and AppSheet charge per user per month. That per-user fee is the main reason a no-code subscription costs more than a custom app over three years.
What if my spreadsheet is very complex?
A very complex spreadsheet costs more on every route, and the AI route handles complexity best on price. Hundreds of nested formulas or VBA macros mean two or three build sprints instead of one. A no-code builder forces someone to rewrite every formula by hand. Leonardo translates the formulas into normal code, and a human engineer checks the results against your spreadsheet's own numbers.