Open source backup vs commercial replication
Confluent Replicator is a capable replication tool for Confluent Platform estates. OSO Kafka Backup solves a different problem — immutable, point-in-time copies of your Kafka data — under an MIT license.
What each tool is for
Confluent Replicator replicates topics, schemas, and configuration between clusters as part of Confluent Platform. It is a commercial product, licensed and supported by Confluent, and pairs naturally with Schema Registry and Control Center.
OSO Kafka Backup is an open source (MIT) backup and restore tool. It captures topic data, consumer group offsets, and cluster metadata to object storage, and restores to any cluster with millisecond-precision point-in-time recovery — something no replicator provides, because replication has no concept of "the state of the topic at 14:03:27.451 yesterday".
| Feature | OSO Kafka Backup | Confluent Replicator |
|---|---|---|
| Licensing | Open source (MIT) | Commercial |
| Point-in-time recovery | Yes | No |
| Protects against bad data / deletes | Yes | No |
| Storage backends | S3, Azure, GCS, local | Kafka only |
| Offset sync | Built-in | Yes |
| Schema Registry sync | Enterprise | Yes |
| Data transformation | Plugins | SMT (Connect) |
| Monitoring | Prometheus | Control Center |
| Runs without Confluent Platform | Yes | No |
| Support | Community / Enterprise | Confluent support |
When to choose which
Choose OSO Kafka Backup when you want open source tooling, you need point-in-time recovery for compliance or incident response, you are not running Confluent Platform, or budget matters — there is no per-broker or per-connector license fee, only your object storage bill.
Choose Confluent Replicator when you are already invested in Confluent Platform, need tight Schema Registry synchronisation between live clusters, and have a Confluent support contract you want to lean on.
As with MirrorMaker 2, the honest answer for many production estates is that replication and backup are complementary layers, not substitutes. The full feature comparison sets all the options side by side.
Frequently asked questions
Is Confluent Replicator a backup tool?
No. Replicator copies live data between clusters. It cannot restore a topic to an earlier point in time, and it propagates deletions and corrupted records to the target cluster. Backup tools keep immutable copies outside the cluster.
Does OSO Kafka Backup work without Confluent Platform?
Yes. It works with any Apache Kafka distribution — self-managed, Strimzi on Kubernetes, Amazon MSK, or Confluent — because it uses standard Kafka client protocols.
Can OSO Kafka Backup handle Schema Registry data?
Schema Registry synchronisation is part of the Enterprise edition. The open source edition backs up topic data, consumer group offsets, and cluster metadata.
How do the costs compare?
Confluent Replicator requires Confluent Platform licensing plus the infrastructure of a second cluster. OSO Kafka Backup is MIT-licensed; your running costs are compute for the backup job and object storage for the compressed backup data.
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