Are there any tools such as Hotjar.com that integrate with SuiteCommerce?

https://netsuite.custhelp.com/app/answers/detail/a_id/27739/kw/Web%20Analytics%20Tools%20Preferences Though you can always add external scripts in the Head section via Web Site setup or SMT pages.

Or use Google Tag Manager to implement the library.

For managing multiple libraries from a centralized place then go for the solution suggested by @wbermudo

Hot jar works in SCA via google tag manager.

@Gordon Truslove Really? Sweet