Aiven for Apache Kafka vs Confluent Cloud

Aiven for Apache Kafka is a managed Kafka service that handles provisioning, patching, backups, security, and high availability. It runs on AWS, Google Cloud, Azure, DigitalOcean, OVH, and UpCloud, with cloud availability varying by plan. Tiered storage and diskless topics can keep topic data in cloud object storage so storage and compute scale independently. A managed Schema Registry powered by the open-source Karapace project is included, alongside predictive consumer-lag monitoring, Kafka Connect compatibility, and a REST proxy. Aiven describes clusters with automatic node recovery and multi-node deployment across availability zones, and lists a 99.99% uptime SLA for Professional. Connections can use mTLS and/or SASL authentication with ACL authorization; stored data is encrypted. The Free plan costs nothing and is capped at 250 KiB/s throughput, three days of retention, and five topics with two partitions each. Developer costs $35 a month, while Professional costs $180 a month. A free 30-day trial is listed for more memory or advanced features.

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.