Sure thing. Your best bet is to use the internet and simply search for options you prefer.
Truth is that Nextcloud is as good as it gets, because it is fully open source.
Other options are not.
Fully open source does not mean freemium or open core.
Unfortunately, there is an endless battle between providing open software while discovering and resolving conflicting opportunities to make money… it is up to the developers to decide what works for them.
The projects you can use will include far fewer features. The number one would be:
- Filestash - open source version does not support Single Sign On.
Frontend webui that requires you provide your own syncing from Minio or Syncthing or FTP or …? It will allow access on the web and support sharing.- Main advantage here is that this modular setup allows you to have fully decentralized file syncing with e2e encryption using a tool like Syncthing.
- no arm64 builds available.
- You’ll be totally on your own for everything.
- etesync - e2e encrypted calendar and contacts.
- there are issues related to such functionality in Nextcloud, but it will not be supported since it is a fork of the original caldav/cardav code. Also such functionality would totally break the Nextcloud webui. See previous forum discussion here.
- projectsend - for sharing files is another option
Lots of other projects, but each only captures a smaller aspect of what Nextcloud offers. Up to you on if that makes sense.
This is a real option, but it will certainly require you do quite a bit of leg work with no promise that it will scale out easily. Since the open source filestash does not support single sign on, you might have difficulty with allowing users to easily manage credentials between these services, etc. Or, forget about the webui and focus on using Syncthing to share your files and folders between locations. You can always attempt to add a front with stash or Filebrowser, etc. Good luck!
Open core projects
All have imposed limitations and proprietary aspects. Advantage is they include syncing, webui and the bells and whistles.
- Pydio Cels written in Go. Compatible with Nextcloud.
- Seafile - Community Edition imposes a large number of limitations, detailed here
- Owncloud
Proprietary projects such as Filerun I will not discuss further here.