Juniper Networks SA 2500: Supports SMBs as a cost-effective solution that can easily handle up to 100 concurrent users on a single system or two-unit cluster. 

Juniper Networks SA 4500: Enables mid-sized to large-sized organizations to grow to as many as 1,000 concurrent users on a single system, and offers the option to upgrade to hardware-based SSL acceleration for those who demand the most performance available under heavy load. 

Juniper Networks SA 6500: Purpose-built for large enterprises and service providers, the SA6500 features best-in-class performance, scalability, and redundancy for organizations with high volume secure access and authorization requirements—with support for as many as 10,000 concurrent users on a single system or tens of thousands of concurrent users across a four-unit cluster.