CockroachDB

CockroachDB provides distributed SQL with PostgreSQL compatibility, global scale, and emerging AI capabilities. CockroachDB Serverless offers free tier (10 GiB storage, 50M RUs) with pay-per-use scaling. Dedicated clusters start around $200/month for production workloads. The database automatically handles distribution, replication, and failover across regions with serializable isolation guarantees. Vector search (preview) enables pgvector-compatible similarity search in distributed environment, unique capability for globally distributed AI applications. Multi-region abstractions (REGIONAL BY ROW, GLOBAL tables) enable latency-optimized data placement. Change Data Capture (CDC) enables real-time streaming to Kafka, webhooks, or cloud storage. The PostgreSQL wire protocol ensures compatibility with existing tools and libraries. Best suited for applications requiring both global distribution and strong consistency. Page should cover: architecture explanation (Raft consensus, distributed transactions), vector search in distributed context, multi-region configuration, pricing model comparison (Serverless vs Dedicated), comparison with Spanner and Aurora, and use cases for global applications.