You have seen the buttons everywhere: “Sign in with Google,” “Continue with Apple.” That is single sign-on, or SSO, and it lets one account log you into dozens of others. It is convenient and often safer than juggling passwords — but it comes with one big catch. Our GetMyPassword team explains what SSO is, its pros and cons, and how to use it wisely.
What single sign-on is
Single sign-on lets you use one trusted account — usually Google, Apple, Microsoft or Facebook — to log in to other sites and apps. Instead of creating a new password, you click “Sign in with Google,” and that provider vouches for you. Importantly, your password is never shared with the other site; it only receives confirmation that you are signed in.
The upsides
- Fewer passwords to create, remember and potentially reuse.
- Faster sign-up and login with a single click.
- Strong provider security — big providers offer robust 2FA and breach monitoring.
- Nothing new to leak — the site never stores a password for you.
The one big catch
SSO creates a single point of failure. If someone breaks into your Google or Apple account, they can reach everything you log into with it. The convenience of one key for many doors also means one stolen key opens them all. There is a privacy angle too: your provider sees every site you sign in to.
Single sign-on is only as strong as the account behind it. If you use “Sign in with Google” everywhere, that Google account is your master key — and it deserves your strongest password and two-factor authentication.
How to use SSO safely
SSO is a good choice — if you protect the hub. Give your SSO provider account a long, unique password from our password generator and turn on two-factor authentication, ideally with an authenticator app or security key. For your most sensitive accounts, such as your bank, consider a separate dedicated login rather than SSO, so they do not all depend on one door.
Frequently asked questions
Is it safe to sign in with Google or Apple?
Generally yes, and often safer than creating another password — as long as that Google or Apple account itself is well protected with a strong password and two-factor authentication, since it becomes the key to everything.
What happens if my SSO account is hacked?
An attacker could reach every site you log into with it, which is SSO’s main risk. That is why the provider account needs your strongest protection and why sensitive accounts may be better with separate logins.
Does the website see my Google password when I use SSO?
No. Your password stays with the provider and is never shared. The site only receives a secure confirmation that you are signed in, along with basic profile details you approve.