I use 1Password at work. It's not very good and doesn't seem to work on linux, which I need for work. Add to that really clunky user management...it's just not that great usability wise. I've never been able to get it to autofill either. Lastpass on the other hand just works on all my devices. We were using Keepass before but syncing was such a massive PITA that my wife wouldn't use it. Now she at least uses Lastpass with a better password than what she was using before, but I suspect until we're robbed she's not going to see the value in security. Don't get me started on her and the 2FA grievances.
I’ve used all of the alternatives and each has pros and cons. I’ve settled on Bitwarden at the moment but may end up moving back to KeePass (again) to gain control of my data. I’ve had to refer to KeePass backups months down the road when I accidentally deleted or didn’t store a password. Feels good to have that control.
The mobile experience lacks polish on iOS with KeePass but the control and security might end up winning out for me.
I ditched 1Password because their Windows app is a catastrophe and their forcing users off to their sync service was really badly handled.
iCloud Keychain doesn't work with all apps or even all browsers, when it doesn't there's no trivial way of copying in a password, it isn't cross-platform, and you cannot import or export existing passwords.
I consider the other products listed as actual competitors of Lastpass, I don't even rank iCloud Keychain that high, it lacks even basic features.
Copying a password isn’t that hard, you can get to it through keychain or the password section in iOS Settings.
It’s definitely not cross platform, but that’s to be expected from an Apple product.
Doesn’t support other browsers? I suppose, but for me and many other people that’s not an issue.
It works fine in for many individuals I think they could consider it a competitor. It’s certainly not an answer for MOST people, but if you’re in the right group it works great.