Oracle Database on Cloud: AWS RDS Oracle vs Azure vs OCI — Cost and Licensing Guide
Oracle Licensing: The Cloud Complexity
Oracle database licensing on cloud is among the most complex and consequential decisions in enterprise IT. The wrong choice can cost hundreds of thousands in unexpected licence fees.
Licensing Models Available
1. Licence Included (LI)
Pay-as-you-go Oracle licences bundled with the instance price. No separate Oracle contract needed. Available on all clouds but most comprehensive on OCI.
2. Bring Your Own Licence (BYOL)
Use existing Oracle licences on cloud. Most cost-effective if you have active Oracle maintenance. Licence mobility rules vary critically by cloud.
The Cloud Mobility Rule — Critical Difference
| Cloud | Oracle DB BYOL Rule | vCPU/OCPU Counting |
|---|---|---|
| AWS | 1 licence per 2 vCPUs | Hyperthreading: 0.5 licence/vCPU |
| Azure | 1 licence per 2 vCPUs | Same as AWS |
| GCP | 1 licence per 2 vCPUs | Same as AWS |
| OCI | 1 licence per OCPU | 1 OCPU = physical core = 2 vCPU |
Key insight: OCI's OCPU-based counting means 1 OCPU licence = 2 vCPUs of compute. On AWS/Azure/GCP, you need 1 licence per 2 vCPUs — effectively the same ratio, BUT OCI provides 1 physical core vs 1 virtual thread. OCI's compute at the physical core level is generally more powerful.
Oracle DB Cost Comparison — 16 vCPU (8 OCPU)
| Cloud | Infrastructure/Month | Oracle EE Licence (est.) | Total/Month |
|---|---|---|---|
| AWS RDS Oracle EE | $1,200 | $3,200 | $4,400 |
| Azure Oracle EE | $980 | $3,200 | $4,180 |
| GCP Oracle EE | $890 | $3,200 | $4,090 |
| OCI DB (LI) | $2,400 | Included | $2,400 |
| OCI DB (BYOL) | $480 | $1,600 | $2,080 |
Oracle Autonomous Database on OCI
OCI's Autonomous Database is unique — self-tuning, self-patching, automated backups. Pricing starts at $0.264/OCPU/hour for Always Free (up to 1 OCPU, 20GB) and $1.340/OCPU/hour for production. No equivalent exists on AWS or Azure.
Recommendation
For organisations with significant Oracle DB workloads: OCI is almost always the most cost-effective choice. Oracle BYOL on OCI with existing licences can reduce total database costs by 40-60% vs AWS/Azure equivalents. If you're running SAP with Oracle DB, the combination of OCI infrastructure pricing and Oracle DB advantages makes OCI the clear leader.
Before migrating Oracle Database to any cloud, model both LI and BYOL scenarios on OCI. For most enterprises, OCI BYOL beats AWS/Azure by a significant margin.
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