Zoho CRM Plus is a customer experience platform that unifies the sales, support and marketing teams of your business on a unified interface, which gives your customer-facing teams a 360-degree view of your customers across all touch points to provide a seamless and consistent experience at every stage of the customer journey.
Zoho One is an all-in-one suite that enables you to run your entire business. It includes 40+ web applications, and gives everything you need to grow your organization, from sales, marketing, customer support, finance, recruitment, to HR, and much more.
Note: For Zoho CRM Plus, you can purchase user licenses for your customer-facing teams. With Zoho One, you need to purchase user licenses for all the employees in your organization.