
NATS
Apache Kafka
RabbitMQ
Redpanda
Apache Flink
Apache ActiveMQ
RisingWave
Apache Pulsar is an open-source, distributed messaging and streaming platform built for the cloud.

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Which is more popular?
Based on our record, Apache Pulsar seems to be more popular. It has been mentioned 6 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | pulsar.apache.org | opalstack.com |
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What each product offers, as listed by its team.


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How often each product is chosen within a category, 0–100% relative to the other.


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External articles and on-site reviews we used to compare the two products.


Pulsar also provides a rich set of client libraries for various programming languages, making it easy to build messaging and streaming applications using Pulsar. Apache Pulsar is a popular choice for real-time data...
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Recommendations tracked on public social media and blogs since March 2021.


Performance Benchmarks: Pulsar vs Kafka, ClickHouse Performance. - Source: dev.to / 11 months ago
Northguard doesn’t look like it’s been open sourced? I’d be curious to know how it compares to Apache Pulsar [0]. I feel like I see some similarities reading the LI blog post. 0: https://pulsar.apache.org/. - Source: Hacker News / about 1 year ago
Ingest real-time data from Kafka, Pulsar, or CDC sources like Postgresand MySQL, with built-in support for Debezium. - Source: dev.to / over 1 year ago
Tracking Opalstack since Sep 2023.
When comparing Apache Pulsar and Opalstack, you can also consider the following products.

NATS.io is an open source messaging system for cloud native applications, IoT messaging, Edge, and microservices architectures.
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Apache Kafka is an open-source message broker project developed by the Apache Software Foundation written in Scala.
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RabbitMQ is an open source message broker software.
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Redpanda is a powerful, yet simple, and cost-efficient streaming data platform that is compatible with Kafka® APIs while eliminating Kafka complexity.
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Flink is a streaming dataflow engine that provides data distribution, communication, and fault tolerance for distributed computations.
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Apache ActiveMQ is an open source messaging and integration patterns server.
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