Skip the complicated formulas. Upload your files, describe the merge in plain English, and download your clean data.
Drag & drop 2 spreadsheets here, or click to browse
25MB per file limit • Files instantly deleted after processing.
Stop watching Excel freeze up. TenMil instantly merges heavy spreadsheets directly in your browser without bogging down your machine or requiring plugins.
Stop Googling INDEX/MATCH or debugging #N/A errors. Just describe what you want, and our AI intelligently maps your column headers so you get a flawless merge without writing a single formula.
Perfect for enriching creator outreach lists, mapping e-commerce customer data, combining Shopify sales exports, or matching payment logs.
| Capability | Excel VLOOKUP | TenMil.ai |
|---|---|---|
| Logic Type | Manual Formula (Cell-based) | Natural Language (Intent-based) |
| Data Scope | One-directional lookup only | LEFT, INNER & FULL OUTER joins |
| Setup Time | Write & debug formulas | Auto-detected join key in seconds |
| Accuracy | Manual & error-prone | Deterministic engine — same result every run |
| Stability | Formulas break on column move | AI-suggested keys & join type |
| Unmatched Rows | #N/A errors scattered in cells | Highlighted & counted per bucket |
| Input Sources | Local files only | Local files + Google Drive |
| Export | Manual copy-paste | Excel, CSV, or Google Drive (one click) |
| Processing | Local (single-threaded) | In-browser SQL engine, no upload required |
| Privacy | Local File | Private (Zero Cloud Storage)* |
TenMil processes your spreadsheets entirely on your own computer. To figure out how your files match up, we send only your column headers and three sample rows to our AI. This tiny sample is transmitted via secure encryption, is never used to train models, and is instantly discarded once a match is found. Your full dataset is never uploaded, never saved to a server, and vanishes forever the second you close the tab.
Standard AI struggles with exact math and data privacy. TenMil solves this by separating the intelligence from the execution. Our schema-aware AI parses your plain-English commands and generates the underlying data logic, completely insulated from your raw files. Our local SQL engine then executes that logic with absolute, deterministic precision.