How are PubNub SDKs licensed? Craig Conover November 02, 2020 18:04 All PubNub SDKs are free and open-source MIT licensed and available on the PubNub GitHub unless otherwise stated in the SDK's license file. Related articles Can I use PubNub for free? Supporting Users and Systems in China Can I build threaded messaging app using PubNub? What is PubNub? What is Access Manager v3?