# How to migrate from a custom auth system to a third-party provider

DevFeed: [How to migrate from a custom auth system to a third-party provider](<https://devfeed.tech/articles/how-to-migrate-from-a-custom-auth-system-to-a-third-party-provider-16032.md>)

Original publisher: [Read original article](<https://workos.com/blog/migrate-custom-auth-to-third-party-provider>)

Author: WorkOS

Published: 2026-08-26T00:00:00Z

Content type: tutorial

Language: en

Sources: [WorkOS Blog](<https://devfeed.tech/sources/workos-blog.md>)

Topics: [migration](<https://devfeed.tech/topics/migration.md>), [passwords](<https://devfeed.tech/topics/passwords.md>), [Single sign-on (SSO)](<https://devfeed.tech/topics/sso.md>), [saml](<https://devfeed.tech/topics/saml.md>)

Tags: [auth](<https://devfeed.tech/tags/auth.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [migration](<https://devfeed.tech/tags/migration.md>), [password](<https://devfeed.tech/tags/password.md>), [rollback](<https://devfeed.tech/tags/rollback.md>), [saml](<https://devfeed.tech/tags/saml.md>), [sso](<https://devfeed.tech/tags/sso.md>), [third-party](<https://devfeed.tech/tags/third-party.md>)

## AI overview

A guide to moving from a custom authentication system to a third-party provider. It explains how password-hash portability, SSO callback control, and an inventory of existing authentication components determine the migration strategy and cutover plan.

## Source excerpt

What is actually portable, how to import password hashes without forcing a reset, and how to cut over with a rollback you can trust.