What is amoCRM written in?

Question

CRM

Good afternoon, maybe someone knows what amoCRM is written in, maybe some kind of framework or what programming language was used?

Answer 1

if you look at the server response headers, you can find:
policyref="/bitrix/p3p.xml",
and draw a conclusion on what it all works on

Answer 2

I know from reliable sources that

• the first version (qcrm) was written in the php programming language on 1C-Bitrix: Site Management
  
• currently it is the same php and GO. I don’t think that there is anything left of Bitrix besides atavisms and admin panel
  

Answer 3

Judging by the headlines, at least Bitrix authorization.