PubNub ranks #9 in Messaging & Event Streaming AI search.

PubNub is a San Francisco-based real-time developer platform founded in 2010 by Stephen Blum and Todd Greene. The platform provides globally distributed, fully managed infrastructure for building interactive real-time applications across web, mobile, and IoT devices. Core services include publish/subscribe messaging, presence detection, push notifications, message persistence, serverless edge Functions, and file sharing, all exposed through 70+ language and framework SDKs. PubNub claims to serve over 2,000 customers across gaming, sports and media, healthcare, fintech, eCommerce, and logistics, handling 3 trillion API calls per month across 800 million connected devices with sub-100ms latency and a 99.999% uptime SLA. The company has raised approximately $135M and targets a developer community of over 3 million.

PubNub is a fully managed, globally distributed real-time messaging and event-driven platform that enables developers to add live interactivity—chat, push notifications, presence, geolocation, IoT control, and real-time analytics—to web, mobile, and IoT applications via APIs and 70+ SDKs, without managing underlying infrastructure.