PubNub is a real-time communication platform and infrastructure-as-a-service company based in San Francisco, California.

The company makes products for software and hardware developers to build real-time web, mobile, and Internet of Things[3] (IoT) applications.

PubNub's primary product is a real-time publish–subscribe[4] messaging API built on their global data stream network.

[8] In April 2019, PubNub received its $23 million Series D round of funding, adding Hewlett Packard Enterprise to the list of investors.

PubNub also provides client libraries for board platforms including Raspberry Pi, Arduino, Texas Instruments, and Microchip.