Rendering custom emojis in cross-organization communications

A first device comprising:

• a first database;
• one or more processors;
• and
• one or more computer readable media storing instructions that, when executed, cause the first device to perform operations comprising:
• receiving, from a second device via a group-based communication platform, a first message associated with a shared communication channel between a first organization associated with the first device and a second organization associated with the second device, wherein the second organization is different from the first organization;
• identifying, in the first message, a first custom emoji that is associated with a resource identifier, wherein the resource identifier is associated with the second organization and not the first organization;
• retrieving the first custom emoji from a second database associated with the group-based communication platform based at least in part on the first resource identifier, wherein the database is associated with the second organization and not the first organization and the database comprises data associated with the second organization and not other data associated with the first organization;
• rendering the first message with the first custom emoji for display via the first device;
• and
• storing emoji data associated with the first custom emoji in the first database, wherein the emoji data comprises permissions associated with the first custom emoji that limit availability of the first custom emoji to rendering in association with subsequent messages associated with the second organization.

One or more non-transitory computer readable media storing computer-executable instructions that, when executed by one or more processors of a first client associated with a first organization associated with a group-based communication platform, cause the first client to perform operations comprising:

• receiving, from a group-based communication platform, a first message originating from a second client associated with a second organization associated with the group-based communication platform, wherein the second organization is different from the first organization;
• identifying, in the first message, a custom content item that is associated with a resource identifier, wherein the resource identifier is associated with the second organization and not the first organization;
• in response to a determination that the resource identifier is not associated with the first organization, retrieving the custom content item from a first database associated with the group-based communication platform based at least in part on the resource identifier, wherein the first database is associated with the second organization and not the first organization and the first database comprises data associated with the second organization and not other data associated with the first organization;
• rendering the first message with the custom content item for display via the first client;
• and
• storing custom content item data associated with the custom content item in a second database associated with the first organization, wherein the custom content item data comprises permissions associated with the custom content item that limit availability of the custom content item to rendering in association with subsequent messages associated with the second organization.