Bitrix Self-hosted version can be hosted on a remote web server of your choice, or deployed on a local network (even with no or limited access to the Internet).
· Bitrix24 Self-hosted version is a PHP based product. If compatible, you can integrate 3rd party add-ons, gadgets and modules. AD / LDAP integration is also supported. The source code availability of the Self-hosted version adds up to more customization flexibility and integration options.