Comparison
Quayen vs Debezium for MySQL to BigQuery
Debezium is the leading open-source CDC project. It reads the MySQL binary log and publishes change events, usually to Kafka via Kafka Connect or through Debezium Server. Getting those events into BigQuery as up-to-date tables is a separate step you build and run. Quayen does the whole path as a managed service.
| Quayen | Debezium | |
|---|---|---|
| What it is | Managed MySQL to BigQuery replication | Open-source CDC engine (Apache 2.0) |
| Cost | Subscription by monthly active rows | Free software; you pay for and operate the infrastructure |
| Infrastructure | None to run | Kafka and Kafka Connect, or Debezium Server, plus monitoring |
| Into BigQuery | Built in: up-to-date tables plus change history | Needs a sink (for example a BigQuery Kafka Connect connector) and your own logic for updates and deletes |
| Initial snapshot | Built in, consistent with the binlog position | Built in (snapshot modes) |
| Flexibility | Focused on MySQL to BigQuery | Many databases and any downstream consumer |
Choose Debezium if
- You already run Kafka and want change events for many consumers
- You need full control and prefer to operate open-source infrastructure
Choose Quayen if
- You want BigQuery tables, not an event stream to build on
- You don't want to run Kafka or Connect clusters
- You want deletes, ordering and schema changes handled for you
Debezium details are based on its public documentation as of October 2026 and may have changed: Debezium documentation, Debezium MySQL connector.
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