Alternatives to ksqlDB

18.0

Arroyo

Arroyo is an open-source distributed stream processing engine for stateful computations on data streams, with sub-second results.

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From $5 a month

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27.8

Apache NiFi

Apache NiFi is free, open-source software for automating data flows between systems, including cybersecurity, observability, event stream, and generative AI pipelines.

Free planOpen sourceWebAPILinux

Free plan

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37.7

Apache Beam

Apache Beam is a free, open-source programming model for building data processing pipelines across batch and streaming workloads.

Free planOpen sourceWebAPILinux

Free plan

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4. 4ES

   Esper

   Esper is a language, compiler, and runtime for complex event processing and streaming analytics in Java and .NET.

   Free planOpen sourceAPILinuxmacOSSelf-hosted
   7.5Free plan
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5. 5AF

   AFL++

   AFL++ is a free, coverage-guided fuzzer that changes program inputs and checks whether a target binary reaches previously unseen execution paths.

   Free planAndroidLinuxmacOSSelf-hosted
   7.2From €20,000 a year
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6. 6

   Confluent Cloud

   Confluent Cloud is a managed data streaming platform built around a serverless Apache Kafka engine.

   Free planWebAPILinux
   7.1From $385 a month
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7. 7TI

   Timeplus

   Timeplus is a streaming SQL platform for real-time data pipelines in analytics, telemetry, and AI/ML.

   Free planWebAPILinuxmacOS
   7.1From $199 a month
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8. 8

   Materialize

   Materialize is a SQL-based live data layer for apps and AI agents.

   Free planWebAPILinuxSelf-hosted
   7.0From $1.50 a year
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9. 9

   RisingWave

   RisingWave is a distributed SQL streaming platform that ingests, transforms, and serves real-time data.

   WebAPILinuxmacOS
   6.7$0.23 usage-based
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10. 10AS

    Apache Storm

    Apache Storm is a free, open-source system for processing unbounded data streams in real time.

    Free planWebAPILinuxmacOS
    6.6Free plan
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11. 11FE

    Feldera

    Feldera is an incremental view maintenance engine that keeps SQL views in sync as input data changes, alongside a lakehouse or warehouse.

    Free planWebAPILinuxmacOS
    6.5Free plan
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12. 12

    Apache Spark

    Apache Spark is a free, open-source engine for large-scale data analytics.

    Free planAPILinuxmacOSSelf-hosted
    6.4Free plan
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13. 13KS

    Kafka Streams

    Kafka Streams is a client library for building applications and microservices that read and write data in Kafka clusters.

    Free planLinuxmacOSSelf-hostedWindows
    6.2Free plan
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14. 14

    Apache Flink

    Apache Flink is a framework and distributed processing engine for stateful computations over bounded and unbounded data streams.

    Free planAPILinuxSelf-hosted
    6.1Free plan
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15. 15PL

    Pathway Live Data Framework

    Pathway Live Data Framework is a Python framework for building analytics and AI data pipelines over stored data and live streams.

    Free planAPISelf-hosted
    6.1Free plan
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16. 16AK

    Apache Kafka

    Free planAPISelf-hosted
    6.0Free plan
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17. 17

    Apache Samza

    Apache Samza is a free, self-hosted framework for processing live data streams and building applications that maintain state.

    Free planAPILinuxSelf-hosted
    6.0Free plan
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18. 18QS

    Quix Streams

    Quix Streams is a free, open-source Python library for processing Kafka data and building real-time streaming applications.

    Free planLinuxSelf-hosted
    5.9Free plan
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19. 19SI

    Siddhi

    Siddhi is a free, open-source stream and complex event processing engine for building event-driven applications.

    APILinuxmacOSSelf-hosted
    5.9
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20. 20

    Hazelcast Platform

    Hazelcast Platform brings a distributed compute engine and fast data store together in one runtime for real-time and AI-driven applications.

    APILinuxmacOSSelf-hosted
    5.8
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21. 21

    Amazon Managed Service for Apache Flink

    Amazon Managed Service for Apache Flink runs Apache Flink applications in the cloud to transform and analyze streaming data in real time.

    WebAPI
    5.5
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22. 22

    Apache Heron

    Apache Heron is a real-time engine for processing data streams across distributed systems, designed to tolerate faults.

    LinuxSelf-hosted
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23. 23TD

    Timely Dataflow

    Timely Dataflow is a free, open-source Rust system for distributed streaming computation and general computation structure.

    APISelf-hosted
    5.3
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24. 24

    Azure Stream Analytics

    Azure Stream Analytics is a web service for processing streaming data with stateful processing, SQL processing and event-time windows.

    Web
    5.1
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25. 25GC

    Google Cloud Dataflow

    Google Cloud Dataflow is a cloud-deployed data processing service accessed through the web.

    Web
    4.9
    Visit

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