First, is the most well-known free tier. Designed for developers, students, and lightweight applications, XE imposes strict limitations: a maximum of 12 GB of user data, 2 GB of RAM, and 2 CPU threads. It is a genuine, fully functional Oracle Database—complete with advanced features like JSON documents and SQL—but crippled for any serious production workload. For a lone developer learning PL/SQL or a small prototype, XE is indeed free as in beer.
Third, represents a modern evolution. It removes XE’s hard storage limit (instead using a soft limit of 12GB for "Free" licensing, but technically allows more at risk of license violation), and adds enterprise features like JSON Relational Duality. However, the legal terms are explicit: production use is strictly prohibited . is oracle database free
Second, offers an Autonomous Database (either serverless or dedicated) with up to 20 GB of storage and a limited number of compute hours per month. This is a strategic "try before you buy" offer, allowing developers to experience Oracle’s flagship cloud product without financial commitment. First, is the most well-known free tier