I found this website also listing some free open-source alternatives to GSheets as well:
www.linuxlinks.com/best-free-op...

I've seen a lot of people recommending OnlyOffice, so I'm including it here

www.onlyoffice.com

Obsidian has some functionality like GSheets and can have E2EE (End to End Encryption) with some plugins and whatnot.

Here's the Obsidian website: obsidian.md

Here's a tutorial on how the spreadsheets + E2EE:
www.youtube.com/watch?v=Q0Ux...

LibreOffice has an android app, though I don't know if it has sharing capabilities like GSheets does (hell, it might even just be a viewer but, who knows! Also, LibreOffice is a great alternative to Microsoft Office for desktop/PC!)
www.libreoffice.org/download/and...

Homepage:
www.libreoffice.org

I found a few spreadsheet ones! I haven't tried them yet, but figured I'd share so others can look into them as well!

www.getgrist.com

This next one seems geared towards authors/writers but would be good as a collaborative GDoc replacement

ellipsus.com

notesnook.com

docs.numerique.gouv.fr/home/

Will do! I've seen a few suggestions going around, but I have yet to see any spreadsheet-specific alternatives (or at least, none that mention spreadsheets). Below are some of the GDoc alternatives I've seen, though the first is for self-hosting

If you have any suggestions for alternatives (that are not Microsoft), please let me know!

If there's any suggestions for a spreadsheet alternative (to Google Sheets), please let me know that as well!

I feel insane. I wasn't going to do anything about it but thought I should backup my drive last night just in case (given that I am now locked out of DMs and "adult" content on bluesky & elsewhere if I don't upload my face/personal details to a third party company).

Also: LibreOffice preserves comments on google drive documents - so if you had edits or nice comments from your friends they will live on after you download them from docs!!

Okay since this has gone nuts: I don't know anything about google's inner workings or what's happening elsewhere or why. I just know what happened to my friend and don't want anyone else to lose their work.

Alternatives to gdocs: Ellipsus, Proton drive, LibreOffice (offline)