How Is “Sign in with Google or Apple” Different from Creating a Separate Account?

Short answer

Both methods usually create an account at the third-party service. The difference is who verifies your identity. “Sign in with Google” or Apple lets the third party accept an identity assertion from Google or Apple, usually without receiving another password. Separate registration makes the third party responsible for its own login credentials. Federated sign-in reduces password reuse, while concentrating access in a primary identity account. Separate credentials isolate that dependency, but add passwords, multifactor settings and recovery processes to maintain. The sensible choice depends on consequences, requested data and recovery preparation.

The third-party account still exists

Selecting a Google button does not move the service inside Google. The third party normally creates its own user record and stores activity, orders, uploads and preferences. It delegates the question “is this the same person?” to an identity provider. Google says standard Sign in with Google shares the user's name, email address and profile picture after consent, but not the Google Account password. A service may separately request Drive, Calendar or other access; that is an additional authorisation, not an automatic part of basic sign-in. Google: How Sign in with Google helps you share data safely

Sign in with Apple can disclose the user's address or create a unique relay address through Hide My Email. Messages to that address are forwarded to the personal inbox, allowing an account without revealing the primary address. The third party still has its own account and whatever information it collects during use. Apple: Hide My Email with Sign in with Apple

The immediate security benefit is one fewer password

Separate registration becomes dangerous when it encourages a reused password. A breach at a small site can then expose email, shopping and social accounts. Federated sign-in means the third party does not need the password for the primary account, and the user does not improvise another memorable variation. If the Google or Apple identity has a unique password, strong multifactor authentication and sound recovery, this is often safer than a hastily created credential.

One fewer password does not mean one fewer security responsibility. The primary identity becomes an entrance to many services, so phishing, stolen sessions and failed recovery have a larger blast radius. Protect it first, review signed-in devices, store recovery codes outside the account, and use phishing-resistant authentication where available.

Federation can also improve revocation visibility. Google and Apple provide a central list of connected services, which can expose forgotten relationships. That list is useful only if reviewed, and removing an entry has narrower effects than many users expect.

Separate registration creates fault isolation, but demands discipline

An independent email identity and unique random password prevent a change to the main Google or Apple account from automatically altering the site's login route. A password manager can make that arrangement practical. For a long-lived service, an account that needs inheritance, or anything that must remain separate from an employer's identity, explicit credentials can make ownership clearer.

The cost is another password reset path, verified address and multifactor configuration. If the user cannot maintain unique passwords, the theoretical isolation disappears through reuse. A service may also offer weaker recovery than a major identity provider. Security is produced by the whole implementation, not by whether a screen contains a provider button.

A separate account need not mean a human-memorised password. A password manager can generate and store a long random value, while passkeys may allow the service to authenticate without a conventional shared secret. The relevant comparison is between actual choices, not “large provider” versus “weak password” as fixed categories.

Read identity permission separately from data permission

A consent screen may request only basic profile information, or it may ask to read email, modify cloud files, view contacts or retain access to a calendar. The first set creates an identity. The second gives the third party capabilities over other data. Google notes that an authorised third party with management access can create, edit or delete data within the approved category. Google: Share access to Google Account data with third-party apps

Do not stop reading because the page carries Google or Apple branding. Verify the third party's name and domain, then examine each requested scope. The identity provider secures a protocol; it does not endorse the service's privacy practices, billing, support or quality. A simple utility requesting complete mail, contacts and drive access deserves an explanation or an alternative.

Permissions can also change the consequence of a compromise. An attacker who reaches a basic profile obtains less than one who inherits an active token allowed to edit files. Review connected applications periodically, especially those with broad or unused access, and remove relationships that no longer have a purpose.

Disconnecting is not the same as deleting data

This is the most consequential misunderstanding. Removing a Sign in with Google connection generally prevents future use of that relationship or access to updated profile information. It does not retrieve data already shared and does not automatically delete the third-party account. Google's own guidance tells users to visit the third party when they want its stored data deleted. An Apple relay address similarly controls a communication route; disabling forwarding does not erase a merchant's orders, messages or analytics.

Leaving a service therefore involves separate operations. Export anything required, use the third party's account-deletion process or data request, and remove identity and additional-data connections from Google or Apple. The safe order depends on whether the site needs the federated login to reach its deletion controls, so do not disconnect first without checking.

If the service permits adding a password or another sign-in method, configure it before unlinking. Otherwise, removing the only identity relationship may lock the user out while leaving the third-party record intact—the opposite of the intended result.

An email relay improves address control, not anonymity

Hide My Email can keep a primary address out of many databases and allows forwarding to be stopped per relationship. That is useful against spam and simple cross-service matching. A service may still identify a person through payment details, device signals, network address, uploaded content and behaviour. The relay address can also become the account's recovery name, so forwarding should not be stopped until any service being retained has a new contact route.

Likewise, Sign in with Google does not mean Google automatically receives all activity inside the third-party account. Data flow depends on the login scope, any separate account linking, the service's policy and the user's grants. The presence of one button is not enough to infer the complete relationship.

My assessment: the choice is where to concentrate trust

Federated sign-in is not universally “more secure”, and separate registration is not inherently “more private”. Federation concentrates authentication in one account that is often defended by a mature security team and reduces a field of weak passwords. Separate registration distributes control and failures, but asks the user to operate password and recovery hygiene across more sites.

I choose by consequence. For a low-risk, occasional service from a credible operator, federated login can remove needless credential management. For financial records, professional archives, development infrastructure or an account expected to survive for years, I examine independent credentials, direct multifactor controls and succession more carefully. A work or university Google identity should rarely be the sole door to a private long-term service, because the organisation can close it.

The worst option is an unrecorded convenience choice. A password manager can store more than passwords: note “Sign in with Apple”, the provider account used, a relay address and who controls the identity. That small record prevents the familiar experience of trying every login button years later and accidentally creating duplicate accounts.

Checklist before choosing

• Is the third party credible, and are its developer name and current domain correct?
• Does the consent request only profile details, or Drive, mail, contacts or another capability?
• Does the primary Google or Apple account have strong multifactor authentication?
• If that identity is locked tomorrow, are offline recovery codes and alternatives available?
• Is this a temporary low-consequence service or a record that must survive for years?
• Is the provider identity personal, or controlled by an employer or educational institution?
• If an email relay is used, has its address and forwarding destination been recorded?
• On departure, will the third-party account be deleted as well as the connection revoked?

Conclusion

Federated sign-in removes another third-party password; separate registration removes another identity dependency. The first works best when the primary account is exceptionally well protected. The second works best when a password manager and independent multifactor authentication keep each important account strong. In either case, treat login, additional data access and deletion as three distinct decisions. The button solves authentication convenience; it does not decide whether the third party deserves particular data or how long it should retain it.

Related reading

• Are Password Managers Safe When They Put All Your Passwords Together?
• Why Is Two-Step Verification More Important Than a Complex Password?
• Does Unsubscribing Mean Your Personal Data Is Deleted?

Continue reading: All articles in How Digital Life Actually Works