The three specific editions of Zend Platform include:

-- The PS release, which loosely stands for performance server. Geared toward SMBs, it offers performance improvements and management functions. Capabilities include PHP intelligence to monitor business applications, and code acceleration and dynamic content caching to boost performance. Other features include output compression to reduce bandwidth for better responsiveness, and simplified configuration management.

-- IS, for integration server, is geared to organizations with application and infrastructure needs. Integration is provided with Java and SNMP infrastructure. Reporting capabilities also are included. A Java bridge interacts with Java objects or J2EE services. Also highlighted is integration with for reporting.

-- ES, for enterprise server, for large organizations that need scalability and reliability. Session-clustering and high availability fail-over are featured. Job queues offer off-line processing for improved interactive responsiveness. A download server offers as much as a tenfold increase in file download speeds.

Subscriptions to Zend Platform start at US$1,500 per server for the PS release.