Is "web to lead" forms and "opt out" compatible with Wordpress website platform?

Is "web to lead" forms and "opt out" compatible with Wordpress website platform?

I am moving my website to a wordpress platform.  I want to be able to use the above features but I first want to make sure Zoho CRM and wordpress are compatible here.  When I did some digging in the archives here it seems that back in 2007, worpress did NOT support <iframe> so web to lead forms did not work.

Does it work now?

Thanks much