Debezium vs Oracle GoldenGate

Quick verdict

Debezium reads database transaction logs and turns each committed insert, update and delete into an event. Its 3.7 documentation lists source connectors for MongoDB, MariaDB, MySQL, PostgreSQL, SQL Server, Oracle, Db2, Cassandra and CockroachDB, plus incubating ones such as Vitess and Spanner. It runs as connectors in Kafka Connect, as the standalone Debezium Server (which sends events to Kinesis, Pub/Sub, Pulsar, Event Hubs, Redis, NATS, Iceberg and other sinks without Kafka), or embedded in a Java application. The project is hosted by the Commonhaus Foundation; the latest stable release is 3.7.1.Final (6 November 2026).

Oracle GoldenGate captures committed DML and DDL from database logs with Extract processes, writes them to trail files and applies them with Replicat on the target. Oracle describes topologies "ranging from simple unidirectional topology to more complex peer-to-peer". The current line is GoldenGate 26ai (version numbers 23.26.x; 23.26.4 in October 2026), which, like 23ai before it, ships for the REST-based Microservices Architecture only. It is also offered as the managed OCI GoldenGate service, and a no-cost GoldenGate Free Docker image covers Oracle databases up to 20 GB.

Side by side

Key differences

Event streaming versus database replication

Debezium produces events. In the classic Kafka Connect deployment each captured table becomes a topic, and each message carries the row before and after the change plus source metadata. What happens next is up to you: a sink connector, a stream processor or a microservice consumes the events. Debezium ships JDBC and MongoDB sink connectors, but it is not designed as a two-way replication system, and its documentation leaves conflict resolution to the consumer.

Oracle GoldenGate is a replication product first. Extract writes committed transactions to trails, and Replicat applies them to the target database, which keeps transactions intact on the other side. Oracle documents bidirectional and peer-to-peer topologies, zero-downtime migrations with online initial load, and non-relational targets (Kafka, NoSQL, object storage, Snowflake, BigQuery) through GoldenGate for Distributed Applications and Analytics. In our view, the question to ask is whether the target is an event stream or another database that must stay transactionally consistent with the source.

Capturing from Oracle

Debezium's Oracle connector chooses an adapter with database.connection.adapter. The default, logminer, uses Oracle LogMiner and buffers events until each transaction commits or rolls back; logminer_unbuffered streams only committed changes, using less connector memory but placing more load on the database. olr reads redo and archive logs through OpenLogReplicator, and xstream uses Oracle XStream, which Debezium describes as "a commercial component of Oracle GoldenGate". A minimal LogMiner setup looks like this:

{
  "name": "orders-oracle",
  "config": {
    "connector.class": "io.debezium.connector.oracle.OracleConnector",
    "database.hostname": "oracle.example.internal",
    "database.port": "1521",
    "database.user": "c##dbzuser",
    "database.password": "********",
    "database.dbname": "ORCLCDB",
    "database.pdb.name": "ORCLPDB1",
    "database.connection.adapter": "logminer",
    "table.include.list": "SALES.ORDERS",
    "topic.prefix": "oracle1",
    "schema.history.internal.kafka.bootstrap.servers": "kafka:9092",
    "schema.history.internal.kafka.topic": "schema-changes.oracle1"
  }
}

GoldenGate's Extract is Oracle's own log capture, documented for Oracle AI Database and the wider GoldenGate certification matrix. If your Oracle estate is large and your team already runs GoldenGate, adding Debezium with XStream may not remove the GoldenGate dependency; LogMiner or OpenLogReplicator are the routes that avoid it.

Active-active and conflict resolution

This is where GoldenGate has no Debezium equivalent. GoldenGate 26ai documents Automatic Conflict Detection and Resolution for Oracle-to-Oracle tables, with latest timestamp, earliest timestamp, delta, site priority and delete-always-wins methods, and manual RESOLVECONFLICT rules for other databases. Automatic CDR is enabled per table through a PL/SQL package, for example:

-- Oracle PL/SQL: latest timestamp CDR on one table
-- (Oracle says to repeat this in each database that replicates the table)
BEGIN
  DBMS_GOLDENGATE_ADM.ADD_AUTO_CDR(
    SCHEMA_NAME => 'HR',
    TABLE_NAME  => 'EMPLOYEES');
END;
/

Debezium is one-way capture. You can build two-way flows on top of it, but loop prevention and conflict rules are your own code. If active-active Oracle is a requirement, GoldenGate is the documented path; if not, the lack of CDR in Debezium is rarely a limitation.

Operations, licensing and cost

Debezium costs nothing to license. You pay for Kafka and Kafka Connect, or a host for Debezium Server, and for the engineering time to manage offsets, schema history, monitoring (JMX metrics, or the Debezium Platform UI on Kubernetes) and upgrades. There is no vendor support from the project. Managed services built on Debezium, such as Confluent's CDC source connectors, are separate commercial products.

GoldenGate is licensed through Oracle. On OCI, deployments are sized in OCPUs (16 GB of memory each) with License included or BYOL and auto scaling up to three times the base, capped at 24 OCPUs. GoldenGate Free is limited to Oracle databases of 20 GB or less, has no Oracle Support and cannot be combined with licensed GoldenGate. Oracle's per-OCPU rates and on-premises list prices were not readable by automated fetch, so get them from Oracle directly.

Pricing and licensing

Debezium. Free under the Apache License 2.0, with no paid edition. Costs are infrastructure (Kafka, Kafka Connect or a Debezium Server host) and staff time, or the price of a third-party managed service if you buy one.

Oracle GoldenGate. Self-managed GoldenGate is licensed through Oracle's technology price list; we could not verify it because oracle.com blocks automated fetches, so ask Oracle for terms. OCI GoldenGate is billed by OCPU, with a choice of License included or BYOL when you create a deployment; per-OCPU rates are on Oracle's cloud price list and are not quoted here. GoldenGate Free costs nothing for Oracle databases up to 20 GB, without Oracle Support.

Pricing checked on the vendors' official pages on 7 November 2026. Prices change; confirm before buying.

Where each one leads

Limitations

When to choose each

When neither is right

• You want a vendor-supported, console-driven replication tool with mainframe or SAP sources: see Qlik Replicate vs Striim.
• You want managed, Debezium-based CDC into Kafka without running Kafka Connect: see Confluent CDC source connectors.
• You need multi-engine, two-way sync across many remote nodes: see SymmetricDS vs Tungsten Replicator.
• It is a one-off migration into AWS: see the AWS DMS guide.

Final recommendation

Frequently asked questions

Sources

• Debezium releases
• Debezium connector for Oracle
• Debezium Server documentation
• Debezium at Commonhaus FAQ
• About Oracle GoldenGate (26ai documentation)
• Oracle GoldenGate 26ai release notes
• Oracle GoldenGate: automatic conflict detection and resolution
• OCI GoldenGate: create data replication resources
• Oracle GoldenGate Free FAQ

Checked November 2026.

How we research comparisons: our editorial method.