Can I integrate Zoho with an i-frame?

Can I integrate Zoho with an i-frame?

I have created a website that helps people manage multiple aspects of their lives and like the services available for the free membership.
I want to integrate the free zoho dashboard to provide my members with the services and applications that you have available.  Is it possible to do this in an iframe?  If I try it just opens a new page and takes people off of my site. 

I don't need a business membership, but would like to be a reseller because I am promoting to businesses as well and I know that there would probably be members that would use the paid services you offer. 

Please let me know if this is possible and if so, how I would do this.