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Apache Kafka

Distributed event streaming platform

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Apache Kafka is an open-source distributed event streaming platform for building high-performance data pipelines, streaming analytics, data integration, and mission-critical applications. It provides durable, fault-tolerant storage for event streams, with clusters that can span availability zones or geographic regions. Core capabilities include high throughput, elastic scaling of storage and processing, permanent storage, high availability, and built-in stream processing with joins, aggregations, filters, transformations, event-time semantics, and exactly-once processing.

Kafka offers a Connect interface for integrating with hundreds of event sources and sinks, including Postgres, JMS, Elasticsearch, and AWS S3. Client libraries support reading, writing, and processing events across many programming languages. The project is supported by documentation, online training, tutorials, sample projects, and an ecosystem of community-driven open-source tools. Kafka is distributed as open-source software, with no paid editions, free plan, trial, or seat-based or usage-based packaging described on the provided pages.

12 alternatives to Apache Kafka

Ranked by how well each tool replaces Apache Kafka: shared features, audience, price and popularity.

  1. Apache Storm

    Distributed real-time computation system for processing unbounded data streams

    Covers 7 of 15 key features and has a free plan.

    Free planOpen source
    71 out of 100 matchFree

  2. Apache Apex

    Enterprise-grade unified stream and batch processing engine with event-time windowing.

    Covers 6 of 15 key features.

    Open source
    65 out of 100 match—

  3. Apache Hadoop

    Open-source software for reliable, scalable, distributed computing

    Covers 2 of 15 key features and has a free plan.

    Free planOpen source
    65 out of 100 matchFree

  4. Apache ActiveMQ

    Multi-protocol, Java-based open source message broker.

    Covers 1 of 15 key features.

    Open source
    64 out of 100 match—

  5. Databricks

    Build and run apps, agents and AI on your data

    Covers 2 of 15 key features and has a free plan.

    Free plan
    62 out of 100 matchUsage-based

  6. RabbitMQ

    One broker to queue them all

    Covers 6 of 15 key features and has a free plan.

    Free planOpen source
    61 out of 100 matchFree

  7. Apache Flink

    Stateful computations over data streams for real-time analytics.

    Covers 1 of 15 key features.

    Open source
    61 out of 100 match—

  8. Apache CloudStack

    Apache CloudStack — Infrastructure for Virtual Machines and Bare Metal

    Covers 4 of 15 key features and has a free plan.

    Free planOpen source
    60 out of 100 matchFree

  9. Apache ZooKeeper

    A high-performance coordination service for distributed applications.

    Covers 0 of 15 key features and has a free plan.

    Free planOpen source
    60 out of 100 matchContact sales

  10. Scaleway

    European Cloud & AI provider (as described on the site)

    Covers 2 of 15 key features.

    60 out of 100 match—

  11. Kong

    The AI connectivity platform for platform builders

    Covers 2 of 15 key features and has a free plan.

    Free planOpen source
    60 out of 100 match$25/mo

  12. Apache Karaf

    The Modulith Runtime

    Covers 2 of 15 key features and has a free plan.

    Free planOpen source
    60 out of 100 matchContact sales