Technologies for synchronizing content items across content management systems

A system comprising:

• one or more processors;
• and
• at least one non-transitory computer-readable medium having stored therein instructions which, when executed by the one or more processors, cause the one or more processors to:
• receive, by a first content management system (CMS) from a client device associated with a user account on the first CMS, authentication information associated with a third-party CMS, wherein the first CMS is configured to synchronize content items between at least the client device and the first CMS using the user account of the first CMS and the third-party CMS is configured to synchronize content items between at least the client device and the third-party CMS using the another user account associated with the third-party CMS;
• based on the authentication information, establish, by the first CMS, a communication channel to the third-party CMS, and determine, by the first CMS, one or more collections of content items stored on the third-party CMS;
• send, by the first CMS to the client device, information identifying the one or more collections being stored on the third-party CMS;
• receive, by the first CMS from the client device, a request to create a first collection of content items based on a second collection of content items selected from the information identifying the one or more collections of content items stored on the third-party CMS;
• create, by the first CMS, the first collection of content items in association with the user account;
• populate the first collection of content items with placeholders corresponding to content items in the second collection of content items stored on the third-party CMS;
• and
• upon detecting, through the communication channel, a change to the second collection of content items stored on the third-party CMS, automatically update the first collection of content items to reflect the change.

A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors, cause the one or more processors to:

• receive, by a client device associated with a user account on a first content management system (CMS), authentication information of another user account associated with a third-party CMS, wherein the first CMS is configured to synchronize content items between at least the client device and the first CMS using the user account of the first CMS and the third-party CMS is configured to synchronize content items between at least the client device and the third-party CMS using the another user account associated with the third-party CMS;
• send, by the client device to the first CMS, the information identifying one or more collections being stored on the third-party CMS;
• based on the authentication information, establish, by the client device, a communication channel to the third-party CMS, and determine one or more collections of content items stored on the third-party CMS;
• receive a request to create a first collection of content items based on a second collection of content items selected from the information identifying the one or more collections of content items stored on the third-party CMS;
• create and store the first collection of content items in association with the user account on the first CMS;
• populate the first collection of content items with placeholders corresponding to content items in the second collection of content items stored on the third-party CMS;
• and
• upon detecting, through the communication channel, a change to the second collection of content items stored on the third-party CMS, automatically update the first collection of content items to reflect the change.