Apache Kafka vs Fivetran Database Replication

Apache Kafka is an open-source distributed event-streaming platform for data pipelines, streaming analytics, data integration, and mission-critical applications. Applications can publish and subscribe to event streams, retain them durably, and process them either in real time or later. Kafka supports durable, fault-tolerant replication across availability zones, data centers, or geographic regions. Kafka Streams provides stateful operations, aggregations, windowing, joins, event-time processing, and exactly-once processing. Kafka Connect links hundreds of event sources and sinks, including Postgres, JMS, Elasticsearch, and AWS S3. Deployments can use bare metal, virtual machines, or containers, on premises or in the cloud, with self-managed or vendor-managed options. The project describes network-limited throughput, latency as low as 2 ms, and clusters of up to 1,000 brokers. Kafka is self-hosted, free, and open source under Apache License 2.0. A local quickstart requires Java 17 or later.

Fivetran Database Replication copies data from databases into cloud data warehouses, databases, online data platforms, and data lakes. It is designed for large workloads and offers fully managed SaaS deployment or hybrid deployment, where selected pipelines run in the customer's secure environment under Fivetran's cloud control plane. Replication methods include log-based, timestamp-based, trigger-based, and log-free change data capture. Listed sources include Oracle, SQL Server, MongoDB, PostgreSQL, Db2 for i, MariaDB, MySQL, SAP ERP, and Cosmos DB. Updates are replicated incrementally in merge batches, with sync intervals configurable from every minute to every 24 hours. Users can exclude schemas or tables, and usage pricing counts inserted and updated rows but not unchanged rows or initial bulk loads. The free plan is listed at free, with limits for connection and activation rows and model runs. Database connectors include a 14-day trial with free historical sync. Enterprise connectors and hybrid deployment are limited to Enterprise and Business Critical plans.