Apache Pulsar vs WSO2 Stream Processor comparison

Pulsar and WSO2 are both solutions in the Streaming Analytics category. Pulsar is ranked #22, while WSO2 is ranked #26. Pulsar holds a 2.6% mindshare in SA, compared to WSO2’s 0.8% mindshare. Additionally, 100% of Pulsar users are willing to recommend the solution.

Apache Pulsar

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100% willing to recommend

WSO2 Stream Processor

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242 Comparison Views

Apache Pulsar

WSO2 Stream Processor

Comparison Buyer's Guide

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Executive SummaryUpdated on Nov 16, 2025

WSO2 Stream Processor and Apache Pulsar are competing in real-time data processing and analytics. Apache Pulsar holds an advantage with its advanced features and broader use cases, justifying its higher price.

Features: WSO2 Stream Processor offers in-memory processing, user-friendly configuration, and supports various data formats. Apache Pulsar provides scalability, multi-tenancy, and fixed processing layers for diverse workloads.

Ease of Deployment and Customer Service: Apache Pulsar is easy to deploy with strong community support for integration and troubleshooting. WSO2 Stream Processor provides a guided setup and comprehensive documentation. WSO2's customer support is noted for responsiveness and personalization.

Pricing and ROI: WSO2 Stream Processor has competitive pricing, making it appealing to smaller organizations, providing good ROI through lower total costs. Apache Pulsar, though potentially higher priced, offers significant ROI with its extensive feature set suitable for complex large-scale implementations.

To learn more, read our detailed Streaming Analytics Report (Updated: January 2026).

Buyer's Guide

Streaming Analytics

January 2026

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Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Categories and Ranking

Apache Pulsar

Ranking in Streaming Analytics

22nd

Average Rating

8.0

Reviews Sentiment

6.2

Number of Reviews

Ranking in other categories

No ranking in other categories

WSO2 Stream Processor

Ranking in Streaming Analytics

26th

Average Rating

0.0

Number of Reviews

Ranking in other categories

Complex Event Processing (CEP) (4th)

Mindshare comparison

As of January 2026, in the Streaming Analytics category, the mindshare of Apache Pulsar is 2.6%, up from 2.0% compared to the previous year. The mindshare of WSO2 Stream Processor is 0.8%, up from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Streaming Analytics Market Share Distribution
Product	Market Share (%)
Apache Pulsar	2.6%
WSO2 Stream Processor	0.8%
Other	96.6%

Streaming Analytics

Featured Reviews

it_user1087029

Solution Architect at Vlaanderen connect.

The solution can mimic other APIs without changing a line of code

The solution operates as a classic message broker but also as a streaming platform. It operates differently than a traditional streaming platform with storage and computing handled separately. It scales easier and better than Kafka which can be stubborn. You can even make it act like Kafka because it understands Kafka APIs. There are even companies that will sell you Kafka but underneath it is Apache Pulsar. The solution is very compatible because it can mimic other APIs without changing a line of code.

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Top Industries

By visitors reading reviews

Financial Services Firm

17%

Computer Software Company

12%

Insurance Company

Comms Service Provider

No data available

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

No data available

Comparisons

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Compared 25% of the time

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Amazon MSK vs Apache Pulsar

Compared 13% of the time

Apache Spark Streaming vs Apache Pulsar

Compared 13% of the time

Apache Kafka vs Apache Pulsar

Compared 12% of the time

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Apache Flink vs WSO2 Stream Processor

Compared 46% of the time

Cloudera DataFlow vs WSO2 Stream Processor

Compared 29% of the time

Software AG Apama vs WSO2 Stream Processor

Compared 25% of the time

More WSO2 Stream Processor Competitors

Product Reports

Buyer's Guide

Streaming Analytics

January 2026

Download Apache Pulsar product report

Buyer's Guide

Streaming Analytics

January 2026

Download WSO2 Stream Processor product report

Also Known As

No data available

WSO2 Complex Event Processor

Overview

Apache Pulsar is a cloud-native, distributed messaging and streaming platform originally created at Yahoo! and now a top-level Apache Software Foundation project

Pulsar

WSO2 Stream Processor is a cutting-edge solution designed for real-time data analytics and processing. It offers enterprises the ability to analyze and act on streaming data, supporting rapid decision-making.

WSO2 Stream Processor empowers businesses to harness streaming data efficiently. With advanced features like event processing, it facilitates real-time insights and responsive actions. This versatile tool is adaptable to diverse business requirements, ensuring scalability and reliability for complex event processing needs. Being an open-source platform, it integrates seamlessly with existing systems, providing extensive customization options for users.

What makes WSO2 Stream Processor exceptional?

Real-time Event Processing: Facilitates immediate analytics and responses for streaming data.
Scalable Architecture: Designed to handle growing data volumes without compromising performance.
Extensible Integration: Easily integrates with multiple data sources, enhancing connectivity.
High Availability: Ensures uninterrupted operation with failover and load balancing.
Open-source Platform: Offers flexibility in customization and deployment.

What benefits should users expect from WSO2 Stream Processor?

Enhanced Decision-Making: Access to real-time data insights enables informed strategies.
Operational Efficiency: Streamlined data processing reduces latency and boosts productivity.
Cost Savings: Open-source nature leads to reduced licensing costs and increased ROI.
Improved Scalability: Adapts to business growth without significant infrastructure changes.

Industries like finance, telecommunications, and retail leverage WSO2 Stream Processor for real-time analytics, improving operational decisions and customer interactions. In healthcare, it supports patient data monitoring, enhancing service delivery with timely insights.

WSO2

Sample Customers

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