Apache Pulsar vs WSO2 Stream Processor comparison

Pulsar and WSO2 are both solutions in the Streaming Analytics category. Pulsar is ranked #21, while WSO2 is ranked #30. Pulsar holds a 2.2% mindshare in SA, compared to WSO2’s 0.4% 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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Apache Pulsar

WSO2 Stream Processor

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Executive SummaryUpdated on Aug 13, 2025

WSO2 Stream Processor and Apache Pulsar are competitive in the stream processing platforms category. Apache Pulsar seems to have the upper hand due to its scalability and versatility, while WSO2 Stream Processor shines in integration capabilities.

Features: WSO2 Stream Processor focuses on integration, real-time data processing, and seamless connectivity with data sources. Apache Pulsar emphasizes distributed messaging, multi-tenancy capabilities, and handling a broad array of streaming workloads effectively.

Ease of Deployment and Customer Service: WSO2 Stream Processor offers straightforward deployment with extensive documentation and a comprehensive support structure. Apache Pulsar, while scalable, may require in-depth technical knowledge for optimal deployment and lacks the same level of customer service structure.

Pricing and ROI: WSO2 Stream Processor features a transparent pricing model with competitive setup costs, aiming for quicker ROI. Apache Pulsar, being open-source, offers lower initial costs, but potential integration and customization expenses could increase over time.

To learn more, read our detailed Streaming Analytics Report (Updated: August 2025).

Buyer's Guide

Streaming Analytics

August 2025

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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

21st

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

30th

Average Rating

0.0

Number of Reviews

Ranking in other categories

CEP (6th)

Mindshare comparison

As of August 2025, in the Streaming Analytics category, the mindshare of Apache Pulsar is 2.2%, up from 1.9% compared to the previous year. The mindshare of WSO2 Stream Processor is 0.4%, up from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.

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

Computer Software Company

25%

Financial Services Firm

10%

Comms Service Provider

Manufacturing Company

No data available

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

No data available

Comparisons

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Compared 36% of the time

Amazon MSK vs Apache Pulsar

Compared 19% of the time

Apache Spark Streaming vs Apache Pulsar

Compared 17% of the time

Redpanda vs Apache Pulsar

Compared 14% of the time

Amazon Kinesis vs Apache Pulsar

Compared 7% of the time

More Apache Pulsar Competitors

No data available

Product Reports

Buyer's Guide

Streaming Analytics

August 2025

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Buyer's Guide

Streaming Analytics

August 2025

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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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