mop vs picobroker

mop

MQTT on Pulsar implemented using Pulsar Protocol Handler (by streamnative)

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picobroker

MQtt PicoBroker for ESP32 based on IBM RSMB (by DynamicDevices)

Mqtt rsmb Esp32

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mop		picobroker
	Project
2	Mentions	1
163	Stars	5
2.5%	Growth	-
6.9	Activity	0.0
4 days ago	Latest Commit	over 1 year ago
Java	Language	C
Apache License 2.0	License	GNU General Public License v3.0 only

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

mop

Posts with mentions or reviews of mop. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-11-10.

Improving Developer Productivity at Disney with Serverless and Open Source
6 projects | /r/java | 10 Nov 2022

While Pulsar has its own protocol that handles streaming, queues, and a lot of the other features (distributed transactions, functions, etc.), it can also speak other messaging protocols via plug-ins. Looking around, the ones that appear to be actively developed are MQTT, Kafka (so your existing applications that use Kafka can also use Pulsar), AMQP, and JMS.
Mosquitto: An open-source MQTT broker
16 projects | news.ycombinator.com | 29 Sep 2021

If you need a highly available broker you can consider https://github.com/streamnative/mop which adds a MQTT protocol handler to Apache Pulsar.
I recently contributed auth support and TLS support also just landed.

picobroker

Posts with mentions or reviews of picobroker. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-09-29.

Mosquitto: An open-source MQTT broker
16 projects | news.ycombinator.com | 29 Sep 2021

The lowest spec device I've come across Mosquitto being used is a 180MHz MIPS processor on 32MB RAM, running Linux.
Someone has recently taken the RSMB broker (from IBM originally) and ported it to the ESP32: https://github.com/DynamicDevices/picobroker I can't comment on what the limitations of that are though.

What are some alternatives?

When comparing mop and picobroker you can also consider the following projects:

emqx - The most scalable open-source MQTT broker for IoT, IIoT, and connected vehicles

zigbee2mqtt - Zigbee 🐝 to MQTT bridge 🌉, get rid of your proprietary Zigbee bridges 🔨

kop - Kafka-on-Pulsar - A protocol handler that brings native Kafka protocol to Apache Pulsar

Node RED - Low-code programming for event-driven applications

hivemq-community-edition - HiveMQ CE is a Java-based open source MQTT broker that fully supports MQTT 3.x and MQTT 5. It is the foundation of the HiveMQ Enterprise Connectivity and Messaging Platform

Tasmota - Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at

mosquitto - Eclipse Mosquitto - An open source MQTT broker

RabbitMQ - Open source RabbitMQ: core server and tier 1 (built-in) plugins

CK-MQTT