Nextcloud. Should be easy to decide. Easy to use, strong community, continuously updates. Own cloud was split from nextcloud. Since then, but especially while covid, nextcloud grows faster and has a huge community More on reddit.com

Both are trash to be honest. More on reddit.com

I've been using Nextcloud for a while now. It's free and works great. But integration with other platforms isn't totally smooth. If you wanna sync your calendar from your phone, you need an extra paid app. There are tons of add-ons and apps for Nextcloud on the server side, but for phones, only the file sync works really well. That one has a Nextcloud app, and it's awesome. You need to have a server running at home. This can be done for a few bucks, but you gotta know your way around hardware for that cheap option. If you don't, an old PC will do, but that'll cost you more in electricity. You need to be able to install Linux. Then you gotta install the Nextcloud software. This is really easy to do. I do it with Ubuntu Server, CasaOS, and then I have a nice interface to install all my other stuff, like Nextcloud. It's all not difficult, and there are tons of guides online. But you do have to do it. It works great from your own network, but if you wanna use it outside your home, you need a static IP address or a DNS service. This can be done with your internet provider or with free services like DuckDNS. This is another extra step you gotta take. Purely as a cloud, it works super! File syncing is amazing and works better than Google's software, at least the way I use it. All the extras like calendar and office stuff only really work well in the browser. From your phone, it's not that great. You need extra apps that aren't exactly clear how they work, and you have to pay. I figured it out, but it wasn't exactly smooth. It works now though. I'd only recommend Nextcloud if you can handle all that stuff. It really works great! But with all those notes and things I just mentioned. For me, it's perfect. I use mostly self-hosted services and also have some game servers running for my friends and me. I cover the electricity costs because I use it so intensively, and the extra paid storage alone would cost me more with Google than my electricity bill. Let alone all the other stuff I run on it. So, if you're handy with this stuff, want all that control, have the hardware for it, and want to self-host more things (game servers, website, media, etc.), then definitely go for self-hosting. But if you just want a working cloud, look for an online European alternative. https://european-alternatives.eu/alternative-to/google-cloud-storage Edit: I'm not an IT guy, don't have a business, I'm just a nerd who likes tinkering. More on reddit.com

I tried to do the same research over the course of the last weeks. To me it seems the file sharing / account part is the most fleshed out. Even Nextcloud Talk and Office work quite fine and well integrated. The biggest issue really comes from replacing what is Exchange in the Microsoft world. There is no proper email server integrated within Nextcloud. That's why projects like Open Desk add OX and other tools as well to the suite. More on reddit.com