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There are some big players that use MQTT although i am not sure about the QoS levels. I know WhatsApp used MQTT, although i am not sure if they still do it not or what QoS they use…

Yes. MQTT is just a protocol and supports three types of Quality of Service (QoS): - QoS 0: Fire and forget - QoS 1: At least once - QoS 2: At most once You can choose to send mess…

Sure. We have already launched the Unicast functionality in Beta and are monitoring it closely. We will be sharing the Unicast post as well soon.

Thanks! The blog outlines our journey for the last 8 months. We ended up sending more than 250Billion+ messages over a Live Cricketing tournament in India. (VIVO IPL 2019)