I’ve been using Bitwarden to supplement Apple Keychain. It seems less Mac like than 1Password. It’s useable, but the interface is clunky.
In 1password, if you want to assign a category to an item, you can drag it to one of the categories. Not so with Bitwarden.
To change an item in Bitwarden, you click the pen button to shift to “edit” mode. To save changes, you must click the diskette button; there’s no keyboard shortcut “command-S” to save.