XAP is a distributed in-memory data grid that has high throughput and low latency due to storing all data in memory. As a result, there is no transaction delay between physical I/O so XAP can be applied to distributed applications ranging from financial services to retail. XAP has 3 tiers to its services: Open source, Premium, and Enterprise. The open source edition supports data partitioning, event processing, and distributed execution. It also supports full transactionality by maintaining full ACID compliance.