Methods and systems for facilitating a two-way user accounts onboarding and linking across multiple service providers are presented. Upon logging in a user device to a first user account of a first service provider, a first user interface associated with the first service provider is provided on the user device. Through the first user interface, a user of the user device may request creating a second user account with a second service provider. The first service provider may then exchange access tokens and refresh tokens with the second service provider to link the first user account with the second user account. After the linking, the first service provider may configure the first user interface to provide the user access to the second user account without requiring the user to log in to the second user account.