1C-Bitrix24 is an internal information resource management system of the company for collective work on tasks, projects and documents, for effective internal communications.
There are two options to create your own corporate portal: the 1C-Bitrix24 cloud service and the Boxed version of the 1C-Bitrix24 service.
Advantages of the cloud version: you don't need to install and configure anything. You register in the service — and immediately start working with your corporate portal, invite employees to it, and start using all the features of the cloud service. There are 6 tariffs for the cloud service, one of which is free with an unlimited number of users.
If you want the portal to be hosted on your servers, and you also need to configure an individual business logic or portal interface, then you should pay attention to the boxed version of the 1C-Bitrix24 service.