In the process of organizing KAZANSUMMIT, we strive to increase the effectiveness of the event and optimize resources. One of the tasks that had to be solved was building a convenient and efficient communication system with our participants. Summit delegates live in more than 60 countries, speak 3 main languages, build individual schedules and ask a lot of questions. To modernize communication systems, we needed a specialized tool. We have worked with the maksat.PRO team as they provide the most competitive service for business event organizers. Thanks to their system, we were able to pay more attention to the content of the event and less to regularly double-check, mix and analyze the participants' data.