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Instead of Apache Pulsar

Apache Pulsar alternatives

Apache Pulsar combines distributed messaging and streaming in a cloud-oriented, open-source platform. It supports sub-10 ms message consumption latency, up to one million unique topics per cluster, configurable cross-region replication, and automatic client failover. Tenants and policies provide access control and broker isolation; built-in connectors, Pulsar Functions, and tiered storage cover data movement, processing, and retention. It runs self-hosted on Linux, macOS, and Windows, and its free plan costs nothing.

1. 1

   EMQX

   Free plan Open source APILinuxMac+2

   IoT teams needing MQTT messaging and data processing — EMQX combines MQTT publish/subscribe with durable queues, SQL-based processing, and gateways, rather than Pulsar’s broader streaming platform.

   Free plan · paid from $234/mo · 14-day trial Visit site
2. 2

   Aiven for Apache Kafka

   Free plan Open source APILinuxSelf-hosted+1

   Teams wanting managed Apache Kafka — Aiven manages Kafka provisioning, patching, backups, and security, with predictive lag monitoring and a 99.99% uptime SLA.

   Free plan · paid from $35/mo · 30-day trial Visit site
3. 3 A

   Apache Qpid Broker-J

   Free plan APILinuxMac+2

   Java applications built around AMQP — Broker-J is a Java AMQP broker with protocol translation, varied queue types, and pluggable persistence, unlike Pulsar’s streaming focus.

   Open source Visit site
4. 4 A

   Apache RocketMQ

   Free plan Open source APILinuxMac+2

   Asynchronous messaging with transactional and FIFO features — RocketMQ emphasizes asynchronous communication and adds transactional messages, FIFO ordering, and native MCP support.

   Open source Visit site
5. 5

   Confluent Cloud

   Free plan APILinuxWeb

   Teams seeking managed Kafka data streaming — Confluent Cloud is a managed, serverless Apache Kafka platform with cluster options, managed connectors, and cross-cloud Cluster Linking.

   7.2 Free plan · paid from $385/mo · 30-day trial Visit site
6. 6

   Eclipse Mosquitto

   Free plan LinuxMacSelf-hosted+1

   Lightweight MQTT messaging on resource-constrained devices — Mosquitto is a lightweight MQTT broker with client tools, focused on IoT publish/subscribe rather than Pulsar’s distributed streaming.

   Free plan Visit site
7. 7 H

   HiveMQ MQTT Broker

   Free plan APILinuxSelf-hosted+1

   Enterprise IoT systems using MQTT — HiveMQ focuses on MQTT device messaging, with persistent offline queues and runtime clustering that can change node count without downtime.

   Free plan · paid from $0.34 · 15-day trial Visit site
8. 8 A

   AxonOps Schema Registry

   Free plan Open source APILinuxSelf-hosted
   8.9 Free plan Visit site
9. 9

   Amazon EventBridge

   Free plan APIWeb
   7.4 Free plan Visit site
10. 10 A

    Apicurio Registry

    Free plan APILinuxMac+3
    7.3 Open source Visit site
11. 11

    AWS Glue DataBrew

    Free plan APIWeb
    7.3 From $0.48 Visit site
12. 12

    Buf Schema Registry

    Free plan APISelf-hostedWeb
    7.3 Free plan · paid from $0.50/mo · 30-day trial Visit site
13. 13

    AWS Glue Schema Registry

    Free plan APIWeb
    7.2 Free plan Visit site
14. 14 L

    Lenses

    Free plan APILinuxMac+3
    7.2 Free plan · paid from $4,000/yr Visit site
15. 15

    Redpanda

    Free plan APILinuxMac+3
    7.1 30-day trial Visit site
16. 16

    Google Cloud Pub/Sub

    Free plan APIWeb
    7.0 Free plan · paid from $40 Visit site
17. 17 K

    Karapace

    Free plan APILinuxSelf-hosted
    7.0 Open source Visit site
18. 18 T

    TIBCO Messaging Schema Repository for Apache Kafka

    Free plan APILinuxMac+1
    7.0 Free plan Visit site
19. 19 R

    Raystack Stencil

    Free plan APILinuxMac+2
    6.8 Open source Visit site
20. 20 S

    Sourcemeta One

    Free plan LinuxWeb
    6.7 Pricing on request Visit site
21. 21 I

    IBM Event Streams

    Free plan Web
    6.0 Free plan Visit site
22. 22 C

    Cloudera Schema Registry

    Paid APILinuxSelf-hosted+1
    5.8 Pricing on request Visit site
23. 23 Y

    Yandex Cloud Schema Registry

    Free plan Web
    5.8 Free plan Visit site
24. 24

    Snowplow

    by Snowplow

    Free trial API
    5.5 Pricing on request · 14-day trial Visit site
25. 25 W

    WarpStream BYOC Schema Registry

    Paid APILinuxMac+1
    5.3 From $0.03 Visit site
26. 26

    Dataphos Schema Registry

    Paid APISelf-hosted
    5.1 Open source Visit site
27. 27 A

    Alibaba Cloud EventBridge Schema Registry

    Paid Web
    4.9 Visit site
28. 28

    Azure Schema Registry

    Paid Web
    4.6 Visit site
29. 29 A

    AWS Glue Data Catalog

    by Amazon Web Services

    Paid
    4.5 Visit site
30. 30

    Google Cloud Managed Service for Apache Kafka

    Paid Web
    4.4 From $0.09 Visit site

Alternatives may fit better when your priority is MQTT-based IoT messaging, a managed Kafka service, or a broker focused on AMQP or asynchronous communication. The options differ in deployment: some are managed cloud services, while others are self-hosted software. Compare their protocols, integrations, processing and reliability features, and prices against Pulsar’s combination of streaming, geo-replication, and client libraries. Pulsar’s encryption, authentication, and authorization controls are not enabled by default, so account for that configuration when weighing a move. Choose based on the messaging model and operational setup your systems need.

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