@TonyK It may seem comparable, because "they're both third-party servers outside of your control". But they're not comparable at all.
Equifax: Their systems could read all of your data.
1Password.com: Their systems cannot read any of your data.
On 1Password.com, every user has a random "Secret Key", as well as a "Master Password". The master password and secret keys are never transmitted from your local machine to 1Password.com. They do not know your keys, and they cannot recover them (or your data/passwords) if you lose your keys. They cannot access your data at all. Their servers merely provide storage for your fully-locally encrypted database.
https://support.1password.com/emergency-kit/
Example Secret Key:
A3-FSHJNM-7T85AC-KRSBV-VC83W-7NTCN-457SS.
Example master password:
This is my master password, and I love it!
The attacker needs to download your encrypted database from 1Password.com, and then they need to guess both the secret key and the password (since 1Password.com doesn't have your secret key or master password). So your "real" password is actually "A3-FSHJNM-7T85AC-KRSBV-VC83W-7NTCN-457SSThis is my master password, and I love it!".
They added the Secret Key because they needed to also protect "idiots" who would choose master passwords such as "password". In fact, the 1Password.com service is the only one that uses a secret key in addition to a master password, so 1Password.com is much safer than local vaults (and that's one of the reasons I am considering moving to a subscription; although my Master password alone is currently very long and safe).
How long would it take to crack that? Let's find out via this cracking calculator!
https://www.grc.com/haystack.htm
The password above is 82 characters long.
There are "
1,
506,369,054,611,815,866,
642,127,428,175,543,440,
377,725,893,118,285,138,
600,105,099,712,489,691,
450,903,417,617,397,029,
222,340,384,187,065,386,
814,343,541,526,587,586,
733,542,513,897,230,085,
778,109,570,767,017,120"
different potential passwords if you try all combinations up to that length.
Time Required to Exhaustively Search this Password's Space:
Online Attack Scenario:
(Assuming one thousand guesses per second) 4.79 hundred thousand trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion centuries
Offline Fast Attack Scenario:
(Assuming one hundred billion guesses per second) 4.79 billion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion centuries
Massive Cracking Array Scenario:
(Assuming one hundred trillion guesses per second) 4.79 million trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion centuries
I would happily give all of you my encrypted 1Password database. Good luck cracking it! I would even happily give copies to the NSA, and to every hacker group in the world. The Universe will be dead long before my single 1Password database is ever cracked.