Recently, I have switched over to Obsidian from Notion due to its open-source nature; however, its lack of syncing has always proved to be a problem for me. I prefer to not use Obsidian Sync—as it is paid—and other closed-source cloud providers, like Google Drive, Microsoft OneDrive, etc., as they do not provide proper end-to-end encryption.
This has caused a dilemma for me, as I am looking for a service that is focused on privacy and security and open-source nature. Ultimately, I boiled down my options to Cryptomator and Syncthing. Nevertheless, I am confused about which service to try out: what are the pros and cons of each aforementioned service, and which service best suits my use case?
Cryptomator is not sync. It is just handling the on-disk encryption layer. You would still need a sync service to sync those encrypted files (syncthing or otherwise).
What devices you are trying to sync will determine what your options are. I don’t believe there is a way to use Cryptomator with iOS currently (for Obsidain).