Rollup Formula Fields in Zoho CRM

Rollup Formula Fields in Zoho CRM

Is it possible to create a formula that's a roll-up field in Zoho CRM.  The use case is that I would like a field on the Account that would be a roll up to show the number of contacts related to the Account.

I'm new to Zoho and used to Salesforce where you can do rollup summary fields for parent-child relationships, so wondering if it's possible to do the same in Zoho CRM?