Apache Pulsar
What is Apache Pulsar?
Apache Pulsar is an open-source, distributed messaging and streaming platform originally created at Yahoo and now maintained as a top-level Apache Software Foundation project. It combines traditional message queuing with stream processing in a single system, separating stateless brokers from an Apache BookKeeper storage layer so brokers can be added or removed without reshuffling data.
Pulsar supports multi-tenancy, geo-replication across clusters, and topic-level acknowledgment models similar to both Kafka and RabbitMQ. It offers official client libraries for Java, Go, Python, C++, Node.js, and C#, plus Pulsar Functions for lightweight serverless processing. Because it is licensed under Apache License 2.0, Pulsar can be self-hosted on premises or in any cloud at no licensing cost, with commercial managed offerings available from third-party vendors.
Key Features of Apache Pulsar
Here are the powerful features that make Apache Pulsar stand out from the competition. Packed with innovative tools and advanced functionalities, this software offers a range of benefits.
- Unified messaging and streaming platform with pub-sub and queue semantics in one system
- Multi-layered architecture separating stateless brokers from Apache BookKeeper storage
- Native geo-replication across clusters and regions with automatic client failover
- Multi-tenancy with built-in namespace isolation, quotas, and access control
- Supports up to a million topics per cluster with horizontal scalability across hundreds of nodes
- Pulsar Functions for lightweight serverless stream processing in Java, Go, and Python
- Individual and cumulative message acknowledgment models
- Official client libraries for Java, Go, Python, C++, Node.js, and C#
- Tiered storage offloading of older data to systems like S3 for cost-effective long-term retention
- Schema registry for enforcing structured data formats across producers and consumers
Apache Pulsar Pricing
Here are the pricing plans for Apache Pulsar. Choose the plan that best fits your requirements and budget.
Apache Pulsar (Open Source)
Free
Unlimited
Released under the Apache License 2.0. Free to download, self-host, and modify with no usage limits imposed by the Apache Software Foundation.
Apache Pulsar Specifications
Get a closer look at the technical specifications and system requirements for Apache Pulsar. Find out if it's compatible with your operating system and other software.
- on premises
- cloud based
- hybrid
- web app
- startups
- smes
- enterprises
Apache Pulsar Videos
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Alternatives of Apache Pulsar
AlternativesExplore alternative software options that can fulfill similar requirements as Apache Pulsar. Evaluate their features, pricing, and user feedback to find the perfect fit for your needs.
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Apache Pulsar Comparisons
Compare Apache Pulsar with other similar options available. Explore the key differences to see why it's the top choice for businesses and individuals.
Overall Apache Pulsar Reviews
Here's our unbiased review of Apache Pulsar. Discover how our team of experts rates its features, ease of use, customer support, and other aspects that contribute to its overall appeal.