Which CRM-system with a constructor function to choose?

Question

CRM

In the customer relationship management system, you need flexible configuration of sections, subsections, fields, accesses, etc., that is, like a constructor: Collect the necessary functionality for yourself, as if we were
developing CRM for ourselves from scratch, but it is desirable without the intervention of programmers or with minimal participation.
Amosrm and Bitrix24 are not suitable, they do not have flexible settings.
What are the best options in this case?

Answer 1

sysclick.ru is perhaps one of the most powerful website builders.
There is a level of work without programming, also with VBS and TSQL.
Very powerful visual design tools, both in win and web.

Answer 2

Pay attention to Zoho, and as an option, you can write your own CRM, many do.

Answer 3

The designer is on Terrasoft. But he's not cheap