What CRM (in terms of service\request manager) do you use?

Question

CRM

Tell me what CRM in the context of service manager, request manager do you use?
What are the pros/cons?
Maybe someone will tell you specifically about my test case:
I would like to automate the processes of the information security department in terms of investigating incidents, communicating with employees, fulfilling requests, and so on, so that integration with the information security system and SIEM is convenient and optional.
Thank you!

Answer 1

Bitrix24 is not bad

Answer 2

In terms of accounting for access requests, I can advise my own solution based on Redmine:
https://github.com/iymaltsev/access_tickets
And in terms of integration with GIS and SIEM, there is hardly anything ready-made, in this case you need to look towards OpenSource -solutions and finish them to fit your needs