Your Excel work, done for you
You don't need to know formulas, or Excel at all. Open your file, say what you want in plain words, and take back a finished .xlsx. It even reads your PDFs when the answers live there.
- No formulas, no tutorials
- Real .xlsx in and out
- Free plan, no card needed
It works in your file, not in a chat
Spreadsheets in plain English
No formulas to write, no menus to dig through. Say what you want and the assistant sets values, writes the formulas, and formats the ranges for you.
Your real Excel files
Open the file you were sent, save the file you'll send on. It opens in Excel like any other, and nobody needs to know how it was made.
You're still in charge
Watch every edit land in the grid. Click any cell and type whenever you want, and undo a whole run in one click if it's not right.
Knowledge base
Attach the documents that hold the answers
Drop the PDF next to the sheet instead of retyping it. Kantaja indexes what you attach, searches it when your request depends on it, and fills in cells from what it actually finds. If the answer is not in your files, it says so instead of guessing.
- PDF, Word and plain text, up to 20 files per workbook
- Answers are grounded in real passages from your files
- Works in chat and inside =AI() formulas
"Alu bracket 40 mm, unit price €4.20"
price-list-2026.pdf
The alternative is you doing it
Why not just paste it into a chatbot?
A chat assistant
You paste data out and get advice back. The edits are still yours to make, cell by cell, and the file never changes.
Learning it yourself
Google the formula, watch the tutorial, ask the one coworker who knows. An hour later the sheet still isn't done.
Kantaja
You open the .xlsx, say what you want, and watch the edits land in the grid. Save and send the finished file.
Why you can trust it with your file
Check its work, any time
Exactly four actions can change your sheet, and each one lands in the log with its range the moment it runs. The only other thing the assistant can do is search the files you attach, and that is read-only.
Revert any run
Each run is one entry in the log. One click rolls back everything it changed.
Questions, answered
Do I need to know Excel?
No. If you can say what you want in plain words, Kantaja can do it: formulas, formatting, cleanup, summaries. You never have to write a formula yourself.
Is there really a free plan?
Yes. The free plan includes a daily assistant allowance and needs no card. Open a file and try it on real work first.
What files does it work with?
Kantaja opens and saves real .xlsx files. The file you take back opens in Excel like any other, so nobody downstream needs to know how it was made. You can also attach PDFs, Word files and plain text for it to read.
Do I need Excel installed?
No. Kantaja is a full spreadsheet editor in your browser. You only need Excel for whatever you do with the file afterwards.
What can the assistant actually change?
Exactly four things: read a range, set values, apply a formula, format a range. Nothing else can touch your sheet, and every action lands in the log with its range the moment it runs.
What happens when it gets something wrong?
You watch every action land as it happens, you can take over at any cell, and one click reverts everything a run changed.
Can I use AI inside a formula?
Yes. =AI() is a worksheet function: give it a prompt and inputs, get a value back in the cell. Results stay put until the inputs change or you refresh them, and it can pull answers from your attached files too.
Can it read my documents?
Yes. Attach PDFs, Word files or plain text to a workbook, up to 20 files. The assistant and =AI() formulas search them and ground answers in real passages from your files. If nothing relevant is found, it says so instead of guessing.
What does it cost?
Free to start, with 4 AI credits a day and no card needed. Pro is $8 a month (40 credits a day) and Max is $32 a month (400 credits a day), billed yearly or monthly. Teams get a $49 Business plan with 5 seats and AI usage included. See the pricing page for details.
Can my team use it?
Yes. Organizations give your team shared workbooks and member invites, with assistant usage tracked at the organization level.