AI Tool to Compare Two Spreadsheets
An AI tool to compare two spreadsheets reads both files and answers plain-English questions about what changed, what's new in one but not the other, and what's missing — without building a VLOOKUP or writing a comparison formula.
Upload two spreadsheets and ask what changed between them, what rows are new, or what values are different — and get a direct answer without touching a formula.
Drop your file in and ask a question — no account needed.
Upload your spreadsheet.xlsx .xls .csv — free to try, no accountWhat this export contains
| Customer ID |
| Company Name |
| Contract Value |
| Status |
| Renewal Date |
| Account Manager |
| Product Tier |
| MRR |
| Start Date |
| Region |
| Industry |
| Last Login Date |
What usually goes wrong with it
Comparing two CSVs with VLOOKUP requires knowing the key column
A VLOOKUP-based comparison requires identifying the unique key column, writing the formula correctly for each column to compare, and handling #N/A errors where rows don't match.
DataMimi Datamimi compares two files by matching on the key column you specify and answers questions about changed values, new rows, and removed rows separately.
Different row counts between files make side-by-side comparison unreliable
If the second file has new rows added and old rows removed, a column-by-column comparison fails because row positions no longer align between the two files.
DataMimi It handles different row counts correctly by matching on a unique ID column rather than row position, so reordered or filtered exports compare correctly.
Value changes and new rows both show up as differences, but need different action
A customer whose MRR changed needs different follow-up than a customer who disappeared from the file entirely. Standard diff tools don't distinguish between these two types of changes.
DataMimi It distinguishes between value changes (same customer, different MRR) and new or removed rows (customer not present in both files) in its answers.
Formatting differences mask real data changes
A customer name spelled 'Acme Corp' in one file and 'Acme Corporation' in the other appears as a change in a text-diff comparison, even though it's the same customer.
DataMimi It normalizes minor text differences like 'Acme Corp' vs 'Acme Corporation' when matching on name, reducing false positives in the comparison.
Multi-sheet workbooks require comparing each tab separately
If both files have 12 monthly tabs, comparing them requires running the VLOOKUP comparison 12 times — once per tab pair.
DataMimi It reads all tabs in both workbooks and compares across tabs in a single question if you ask about a specific tab or the overall differences.
Common questions
How does an AI tool to compare two spreadsheets work?
Upload both files in the same Datamimi session, then ask your comparison question in plain English. Datamimi matches rows by the key column and answers questions about what changed, what's new, and what's missing.
Does it work when the two files have different numbers of rows?
Yes. Datamimi matches by a key column like Customer ID or Order ID rather than by row position, so it handles files where rows were added, removed, or reordered.
Can it compare files from two different time periods automatically?
Yes. Upload last month's file and this month's file, then ask 'what changed between these two files' and Datamimi identifies the differences.
What does Datamimi cost?
Free: $0/month, 40 credits. Lite: $9/month, 400 credits. Starter: $24/month, 1,500 credits, up to 3 simultaneous files. Pro: $59/month, 5,000 credits with rollover. Team: $199/month, 20,000 credits, 5 users. No credit card required for the free plan.
Can it compare Excel files with multiple tabs?
Yes. Upload both multi-tab workbooks and ask about differences across specific tabs or the entire workbook.
Try it with your own file
DataMimi reads the file you actually have — merged cells, headers below row one, totals pasted at the bottom — and shows which rows and columns every number came from.
Ask about your fileWhat DataMimi costs
Every plan does everything — slides, written reports, cleaned exports, dashboards. They differ in how much work they cover.
Free
Free
40 credits a month
Starter
$24 /month
1,500 credits a month
Pro
$59 /month
5,000 credits a month