LavinMQ

Judgement

What it is

Building block

What it does

A message queue and streaming server that speaks AMQP 0-9-1 and MQTT, so existing RabbitMQ clients connect to it unchanged.

Adopt it when

You use AMQP and want a broker with lower memory use than RabbitMQ, either self-hosted or through CloudAMQP.

Watch out

It covers less of RabbitMQ's plugin and feature set, and it is written in Crystal, which few teams can debug or patch.

Ready for

Usable

Runs as

Self-hosted server and cloud service

Built with

Crystal

How established

Established: started 9 years ago, latest release v2.10.4.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: LavinMQ → Crystal → runs on a microchip

How compilers were built, back to punched paper tape

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