For Heimdall Database Proxy the Standard, Enterprise and Enterprise Plus licenses are based on the number of proxy, CPU core increments.
For Heimdall Database Proxy for Greenplum the Enterprise and Enterprise Plus licenses are based on the number of Greenplum CPU cores.

Size Your Proxy For Heimdall Database Proxy Standard, Enterprise and Enterprise Plus Editions
Add up your database CPU cores, and take 25% for the proxy cores.

Example: for 64 database cores, begin with 16 proxy cores.

For Data Warehouses, proxy sizing will require testing.

Standard Edition

• Active/Standby Failover only
• Query Caching
• Read/Write Split for ACID Compliance
• Connection Pooling

Enterprise Edition

• Active/Active proxy auto-scaling
• Standard Edition Features
• Basic Active Directory Integration
• Enterprise level support

Enterprise Plus Edition

• Multi-tenant customer routing for SaaS platforms
• Active Directory Integration for large scale
• SQL Security (Data masking, GDPR auditing, Honey-tokens)
• All Enterprise Edition features

Technical Support Tiers
Standard Edition: Best-effort.
Enterprise Edition: Guaranteed service level agreement.