In addition to sibling poster, and while they've gone in an unfortunate cloud sub direction overall, it's still possible to buy an entirely standalone non-subscription normal license for 1Password and sync vaults via Dropbox, iCloud for those in the Apple ecosystem, a folder, or manually via WiFi. You can then use an application firewall or anything similar to monitor all network connections. At least from what I've seen 1Password makes only the expected connections needed for their own services for things like auto update checks, Watchtower (a typical local compromise check system with k-anonymity, their page here [0]), and sync. All of them can be disabled with no effect beyond the expected of those functions not happening.
I do wish we lived in a world where things had gone a bit differently and LAN had gained more of a role in all this, and one could pay for and run their own 1Password server. Of course for that matter passwords and they exist now shouldn't exist at all, it should all be public keys. Password managers themselves are a form of collective madness and horrible path dependency. And in principle 1P could maybe do some form of exclusive first party tracking and simply give up on whomever didn't talk to them. But for now at the least they still have the option to avoid dependencies on them pretty well.
I do wish we lived in a world where things had gone a bit differently and LAN had gained more of a role in all this, and one could pay for and run their own 1Password server. Of course for that matter passwords and they exist now shouldn't exist at all, it should all be public keys. Password managers themselves are a form of collective madness and horrible path dependency. And in principle 1P could maybe do some form of exclusive first party tracking and simply give up on whomever didn't talk to them. But for now at the least they still have the option to avoid dependencies on them pretty well.
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0: https://support.1password.com/watchtower-privacy/