Name Broker Address TCP Port TLS Port WebSocket Port Message Retention Persistent Session
Eclipse mqtt.eclipse.org 1883 N/A 80, 443 YES YES
Mosquitto test.mosquitto.org 1883 8883, 8884 80 YES YES
HiveMQ broker.hivemq.com 1883 N/A 8000 YES YES
Flespi mqtt.flespi.io 1883 8883 80, 443 YES YES
Dioty mqtt.dioty.co 1883 8883 8080, 8880 YES YES
Fluux mqtt.fluux.io 1883 8883 N/A N/A N/A
EMQX broker.emqx.io 1883 8883 8083 YES YES
https://mntolia.com/10-free-public-private-mqtt-brokers-for-testing-prototyping/