last piece before we can totally skip G-Suite

The only thing keeping my Google account alive at this point. Hoping to see this soon, and I think we will.

Spreadsheets with modern capabilities, I think it's important to point this out.

It would be of no use to me if the implemented sheet service is just something like SUM and INDEX/MATCH, when even LibreOffice has recently implemented some of Office 365/Google Sheet's functions: XLOOKUP, SEQUENCE, XMATCH, and so on.

I am new to Proton so forgive me. Am I correct in saying that I cannot access or edit my Microsoft Excel sheets stored on my Proton Drive from my Android phone, without having to download, edit and then upload again. If so this is not what they advertise on the website.

this is essential to transition my business email to proton

This is the last reason I'm still using google drive. Also, I believe that a large numbers of researchers I know are using Google Slides as well (because they can access their presentations on pretty much any machine with a decent browser, which is a critical feature when presenting abroad, etc).

I'm sure this is on the docket, this is a MUST for me. Google Sheets is the only Google office product I use cause it just can't be beat.

Like a lot of others comments, I need this to replace totally Google.

Yes, please add a way of using spreadsheets like Docs.

Please, please, pleas! Don't reinvent the wheel... Just add .odf client like in nextcloud...

Pasting previous comment from a similar post:

This is critical to me, and probably to many other users, as we have our small business data on Google Sheets, and what's stopping me from fully moving over.

If there would be a privacy-oriented spreadsheet app that has the mentioned features, I could get multiple organizations to jump on the whole Proton suite as enterprise customers.

Proton Sheets, but more private than Google Sheets

I won't be able to convince my friends to ditch google collaborative editing without a, even somewhat basic, replacement for Google Sheet, it would be truly amazing to get that!

Proton Docs should just be one product with the ability to open any MS office document and LibreOffice document.

And please add an API too - I would love to use a microcontroller for measurements and send it to Proton Sheet. Currently I need to use Google Spreadsheets for this.

I think spreadsheets are available in Standard Note which is part of Proton world now. Maybe it'll be integrated in Drive later.

As a business user sheet would be a very nice feature to switch away from google.

Yes, spreadsheets would be tremendously useful, and would entice me away from Google Drive altogether, I think. (I bet it's on the cards.....) 🙏

I need it to stop using Google

Like NVR3JCT, Google sheets (and docs) are the last reason I have to stay with google.
I have dozens of small sheets for quick calculations and can edit them reasonably well on mobile and desktop. That is an indespensable feature for me. Cryptpad offers a hole spreadsheet app that looks extensive in functionality, but is unusable on mobile. To be able to quickly input numbers into a spreadsheet when on the go seems to be only possible with google sheets, at least not without some form of subscription.
If proton would offer such a spreadsheet editing functionality, I would transfer my google files immediately and get a paid account.