Bitrix24 communication tools are available to unlimited number of users. You can invite any number of users to your Bitrix24, they will be able to use Activity Stream messages, chats, mobile app - for free.
Communication tools include:
- Activity Stream
- Chat & video calls
- Telephony (access to tools, calls are charged individually due to telephony rates)
- Network 2.0
- HR tools (Company Structure, employees (list), employee profile page)
- Mobile app