Confluent Cloud vs WarpStream BYOC Schema Registry

Confluent Cloud is a managed data streaming platform built on a serverless Apache Kafka engine. It is designed for real-time streaming, event-driven applications, analytics, and AI/ML workloads. Cluster choices include Basic, Standard, Enterprise, and Freight, as well as Dedicated clusters with pre-provisioned resources. Confluent says its cloud-native engine adjusts cluster infrastructure to workload needs. Cluster Linking replicates, synchronizes, and shares data across regions, public clouds, and organizations. The service includes managed Kafka connectors for databases, data lakes, and warehouses, serverless processing with Apache Flink, and a managed Stream Governance suite. Tableflow can materialize Kafka topics and schemas as Apache Iceberg and Delta Lake tables. Listed security features include RBAC, self-managed encryption keys, client-side field-level encryption, and audit logs. Users can manage clusters and topics through a web UI or CLI; supported client languages include Java, Python, .NET, Go, Node.js, and C/C++. It is available on AWS, Azure, and Google Cloud across more than 100 regions. A free plan is available; paid plans start at $385/mo, and new signups receive a 30-day trial.

WarpStream BYOC Schema Registry stores and serves schemas for Kafka records through a REST server compatible with Confluent’s Schema Registry API. It supports Avro and protobuf, while WarpStream Agents validate records and can reject invalid data or emit metrics. The stateless, zero-disk registry stores schemas in the customer’s object storage, and WarpStream says they remain in that cloud account. Schema Linking migrates schemas from a Confluent-compatible registry while preserving IDs and compatibility rules. Authentication options include Basic Authentication, TLS and mutual TLS. Customers create a Schema Registry Virtual Cluster in the console or API, then deploy an agent using the Kafka Agents binary; agents emit logs and metrics. Each registry allows 100,000 schema versions and each schema 1 MB, with support-requested increases. Plans are Dev at $0.03 a month, Fundamentals at 0.17 USD, Pro at 0.52 USD, and Enterprise with no listed price. Cluster minutes use 15-minute billing intervals.