You can host Bitwarden yourself on your own computer. That way, nothing leaves your computer unless you want it to. Check the Bitwarden site.I switched from 1Password to Bitwarden. I had standalone licences for Mac and Windows but 1Password only syncs with iCloud or Dropbox and since Dropbox imposed a 3 device limit, I found I couldn't sync between devices/computers without paying more. This became worse when I switched from iPhones to Android. I always found 1Password's synching clunky at best. Too many duplicates or delays in synching between iCloud and Dropbox.
I don't like how Bitwarden has a central server to store data rather than how 1Password managed it and Lastpass has been compromised once already but them's the breaks etc.
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For all those running and advocating Apple Keychain, what do you do when it doesn’t sync or doesn’t work at all? That scenario has happened more than once with Apple.