Compare
Apache Kafka vs Confluent
Kafka is free but you operate it yourself; Confluent is Kafka's own creators selling a managed version with schema registry and connectors built in.
Side by side
| Apache Kafka | Confluent | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Apache Software Foundation | Confluent, Inc. | ||||||||
| Pricing model | Open source + paid options | Usage-based | ||||||||
| Free tier | Yes | Yes | ||||||||
| Deployment | Self-hosted | Cloud, Self-hosted | ||||||||
| Open source | Yes (Apache-2.0) | No | ||||||||
| Best for | Engineering teams building event-driven architectures who want full control over a self-managed streaming backbone. | Teams wanting managed Kafka with enterprise features without operating brokers themselves. | ||||||||
| Pricing | Free and open source with no vendor pricing; operating costs depend entirely on self-hosted infrastructure or a chosen managed distribution. Pricing has not been verified yet — see the vendor's site. | Metered by Elastic Confluent Units for Kafka (eCKU) per hour plus data ingress/egress and storage; Basic tier's first eCKU is free.
Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget. | ||||||||
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Verdict
Confluent doesn't compete with Apache Kafka so much as sell a managed and extended version of it — the company was founded by Kafka's original creators, and Confluent Cloud runs the same underlying protocol with a schema registry, 120+ managed connectors and stream processing (ksqlDB and Flink-based) layered on top. Kafka itself is entirely free, open-source software with no vendor and no managed offering of its own: you either operate a cluster yourself or pay someone — Confluent or another provider — to run Kafka-compatible infrastructure for you.
Choose Apache Kafka if
- You already have (or want to build) in-house Kafka operational expertise and prefer to avoid vendor spend entirely.
- Your use case doesn't need the schema registry, managed connectors or stream processing Confluent adds — a bare cluster is enough.
- You want zero dependency on any single vendor's roadmap or pricing changes.
Choose Confluent if
- You want Kafka's ecosystem and protocol without operating brokers, upgrades or scaling yourself.
- You need a schema registry and a large managed connector catalog out of the box rather than assembling them separately.
- You want the option to run self-managed (Confluent Platform) today and migrate to fully managed (Confluent Cloud) later without changing your client code.
What they share
Both speak the same Kafka protocol, so client code, Kafka Connect connectors and tooling built for one generally work with the other. Confluent Platform itself is layered on open-source Kafka, so choosing Confluent doesn't mean abandoning the open ecosystem — it means paying for operational convenience and enterprise features on top of it.
The honest caveat
Running Kafka yourself is not actually free once you count engineer time for cluster operations, upgrades and incident response — for many teams, Confluent's metered eCKU pricing is a fair trade for that time, not a markup on something free. Compare total cost including your own operational overhead, not just Confluent's invoice against Kafka's zero license fee.
Last reviewed September 22, 2026