In Ronin, a client is a person or company that receives your invoices and estimates. In contrast, a contact is a individual that is associated with a client.
Clients can have multiple contacts. Depending on your use of Ronin, a contact may represent individuals at a company or individual contact points for a single person.
A contact is different from a client because each contact has an email and each contact may optionally be invited to log in to Ronin to share projects and view invoices and estimates.