Integrating a communication platform into a third-party platform

1. A method comprising:

causing presentation, within a third-party user interface of a third-party platform, of an object associated with a third-party application and an affordance associated with a group-based communication platform, wherein the third-party user interface is presented in a group-based communication user interface on a display device; and

based at least in part on detecting a user input associated with the affordance within the third-party user interface, and in response to the user input:

partitioning the group-based communication user interface into a plurality of sections;

retrieving the object associated with the third-party application from the third-party platform;

retrieving one or more messages from the group-based communication platform;

causing presentation of the one or more messages in a first section of the plurality of sections of the group-based communication user interface; and

causing presentation of the object in a second section of the plurality of sections of the group-based communication user interface, wherein the first section and the second section are presented simultaneously and are independently interactable within the third-party user interface.

2. The method of claim 1 , wherein the one or more messages are associated with a channel of the group-based communication platform.

3. The method of claim 1 , wherein the one or more messages are associated with a direct message of the group-based communication platform.

4. The method of claim 1 , wherein the user input comprises a first user input, the method further comprising:

receiving a second user input associated with the first section of the third-party user interface; and

causing a new message associated with the second user input to be presented via the first section of the group-based communication user interface and the group-based communication user interface associated with the group-based communication platform.

5. The method of claim 1 , wherein at least one of the one or more messages includes a representation of the object.

6. A system comprising:

one or more processors; and

one or more non-transitory computer-readable media storing instructions that, when executed by the one or more processors, cause the system to perform operations comprising:

causing presentation, within a third-party user interface of a third-party platform, of an object associated with a third-party application and an affordance associated with a group-based communication platform, wherein the third-party user interface is presented in a group-based communication user interface on a display device; and

based at least in part on detecting a user input associated with the affordance within the third-party user interface, and in response to the user input:

partitioning the group-based communication user interface into a plurality of sections;

retrieving the object associated with the third-party application from the third-party platform;

retrieving one or more messages from the group-based communication platform;

causing presentation of the one or more messages in a first section of the plurality of sections of the group-based communication user interface; and

causing presentation of the object in a second section of the plurality of sections of the group-based communication user interface, wherein the first section and the second section are presented simultaneously and are independently interactable within the third-party user interface.

7. The system of claim 6 , wherein the one or more messages are associated with a channel of the group-based communication platform.

8. The system of claim 6 , wherein the one or more messages are associated with a direct message of the group-based communication platform.

9. The system of claim 6 , wherein the user input comprises a first user input, the operations further comprising:

receiving a second user input associated with the first section of the third-party user interface; and

causing a new message associated with the second user input to be presented via the first section of the group-based communication user interface and the group-based communication user interface associated with the group-based communication platform.

10. The system of claim 6 , wherein at least one of the one or more messages includes a representation of the object.

11. One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, cause the one or more processors to perform operations comprising:

causing presentation, within a third-party user interface of a third-party platform, of an object associated with a third-party application and an affordance associated with a group-based communication platform, wherein the third-party user interface is presented in a group-based communication user interface on a display device; and

based at least in part on detecting a user input associated with the affordance within the third-party user interface, and in response to the user input:

partitioning the group-based communication user interface into a plurality of sections;

retrieving the object associated with the third-party application from the third-party platform;

retrieving one or more messages from the group-based communication platform;

causing presentation of the one or more messages in a first section of the plurality of sections of the group-based communication user interface; and

causing presentation of the object in a second section of the plurality of sections of the group-based communication user interface, wherein the first section and the second section are presented simultaneously and are independently interactable within the third-party user interface.

12. The one or more non-transitory computer-readable media of claim 11 , wherein the one or more messages are associated with a channel of the group-based communication platform.

13. The one or more non-transitory computer-readable media of claim 11 , wherein the user input comprises a first user input, the operations further comprising:

receiving a second user input associated with the first section of the third-party user interface; and

causing a new message associated with the second user input to be presented via the first section of the group-based communication user interface and the group-based communication user interface associated with the group-based communication platform.

14. The one or more non-transitory computer-readable media of claim 11 , wherein at least one of the one or more messages includes a representation of the object.

15. The one or more non-transitory computer-readable media of claim 11 , wherein the one or more messages are associated with a direct message of the group-based communication platform.

16. The one or more non-transitory computer-readable media of claim 11 , wherein the object comprises a text document.

17. The one or more non-transitory computer-readable media of claim 11 , wherein the object comprises an image.

18. The one or more non-transitory computer-readable media of claim 11 , wherein the object comprises a video.

19. The one or more non-transitory computer-readable media of claim 11 , wherein the group-based communication platform comprises a permission-based communication platform.

20. The one or more non-transitory computer-readable media of claim 11 , wherein the affordance comprises an actuation mechanism.