Top 9 Open-Source Alternatives to Apache Pulsar

The top open-source alternatives to Apache Pulsar are NATS, Memphis, and KubeMQ. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

NATS Landing Page
1

NATS

NATS.io is an open source messaging system for cloud native applications, IoT messaging, Edge, and microservices architectures.
Pricing:
- Open Source
#Developer Tools #Queueing, Messaging And Background Processing #App Development 63 social mentions
memphis.dev
2

Memphis

Highly scalable, and effortless data streaming platform. Made to enable developers and data teams to collaborate and build real-time and streaming applications fast.
Pricing:
- Open Source
#Developer Tools #Queueing, Messaging And Background Processing #Data Streaming
KubeMQ Landing Page
3

KubeMQ

Kubernetes message broker and message queue platform. An open-source project providing the most efficient way to connect microservices.
Pricing:
- Open Source
#Data Integration #Web Service Automation #Stream Processing 1 social mentions
redpanda.com
4

Redpanda

Redpanda is a powerful, yet simple, and cost-efficient streaming data platform that is compatible with Kafka® APIs while eliminating Kafka complexity.
Pricing:
- Open Source
#Developer Tools #Queueing, Messaging And Background Processing #Data Streaming 1 social mentions
vanus.ai
5

Vanus AI

Customize ChatGPT bots with enterprise data from documents and links. Accessible via API or integration on your website.
Pricing:
- Open Source
#Developer Tools #App Development #Data Streaming
Apache Flink Landing Page
6

Apache Flink

Flink is a streaming dataflow engine that provides data distribution, communication, and fault tolerance for distributed computations.
Pricing:
- Open Source
#Stream Processing #Big Data #Developer Tools 28 social mentions
Sidekiq Landing Page
7

Sidekiq

Sidekiq is a simple, efficient framework for background job processing in Ruby
Pricing:
- Open Source
#Ruby On Rails #Ruby #Background Processing 21 social mentions
Postman Landing Page
8

Postman

The Collaboration Platform for API Development
Pricing:
- Open Source
#APIs #API Tools #Developer Tools 27 social mentions
EMQX Landing Page
9

EMQX

EMQX is an open source MQTT 5.0 broker for mission-critical IoT scenarios, massively scalable and highly available clustering, running anywhere from edge to cloud.
Pricing:
- Open Source
- Freemium
- Free Trial
#IoT Connectivity #Message Queue #Mqtt