I use Google Apps in my company. I am interested in integrating it with Zoho CRM.

But which Zoho CRM edition do I need to purchase to use the integration: Zoho CRM Enterprise Edition? Professional Edition? Standard? Free?

I have read the page on Google Apps integration:  https://www.zoho.com/crm/help/google-integrations.html but it does not specify which Editions it is available in. Also, the editions comparison page  https://www.zoho.com/crm/comparison.html does not mention the Google Apps integration.

Can someone from Zoho clarify please? thanks -Ricardo