WordPress

Al-Amin Rais here is a reference which might help https://www.wpbeginner.com/showcase/24-must-have-wordpress-plugins-for-business-websites/

There are several plugins. WPForms is a very popular one. Just search Wordpress plugin store, you will see many plugins

Tnx a lot BroFar Ore

Someone very beautifully said that : " Sometimes one should use search bar before asking " Oh! It's said by me. Why don't you follow this, google my help you the best. #stay_safe #dont_spam

I know you can check which theme is use but I can't seems to know which form plugin is use here: healthcaresecurityltd.com/app/registration