Oracle Corporation

Microsoft is a direct competitor across many product lines, including databases (SQL Server vs. Oracle Database) and cloud infrastructure (Azure vs. Oracle Cloud Infrastructure). Microsoft Dynamics 365 also competes with Oracle's ERP and CRM offerings.

AWS is a primary competitor in cloud infrastructure (IaaS and PaaS), offering a broad range of services that compete with Oracle Cloud Infrastructure (OCI). While OCI focuses heavily on databases, AWS targets broader computational power at scale.

SAP is a major competitor in the enterprise resource planning (ERP) space, directly challenging Oracle's ERP solutions with its own comprehensive offerings.

Alphabet, through Google Cloud, competes with Oracle in cloud infrastructure and enterprise software solutions.

IBM competes with Oracle in database management systems (IBM Db2 vs. Oracle Database) and cloud solutions (IBM Cloud vs. Oracle Cloud), often focusing on hybrid solutions.

Salesforce is a leading competitor in cloud computing, particularly in customer relationship management (CRM) and customer experience (CX) solutions, areas where Oracle also has significant offerings.