Hi Chris,
Yes, you can invite users outside you organization to view your APIs.
If your APIs are Public, you can share the link directly with your customer users so they can view it. For a private API, you'll need to have your intended users create a free SwaggerHub account, and then add them as Collaborators to the APIs you wish them to view. You can refer to the documentation below for specifics.
If you have an on-premise Enterprise plan, you can still invite users but they'll take up a Consumer spot within your organization.
https://support.smartbear.com/swaggerhub/docs/apis/public-and-private-apis.html
https://support.smartbear.com/swaggerhub/docs/collaboration/collaborators.html
Hope this helps,
Alex
