Best Open-source Message Brokers & Queues tools

RobustMQ

High-performance multi-protocol messaging platform for cloud-native AI workloads

PGMQ

Lightweight PostgreSQL‑based message queue with exactly‑once delivery

ElasticMQ

Lightweight SQS‑compatible message queue for testing and development

Apache Kafka

Scalable distributed event streaming platform for real‑time data pipelines

Apache Pulsar

Scalable, low‑latency pub‑sub platform for real‑time data streams

RabbitMQ

Robust multi-protocol messaging broker for cloud-native applications

BlazingMQ

High-performance, fault-tolerant distributed message queue for modern workloads

NSQ

Scalable, fault-tolerant messaging for billions of events daily

SmoothMQ

SmoothMQ: Drop-in SQS replacement with UI, tracing, and scheduling