PubNub

PubNub is a real-time communication platform that provides ultra-low-latency APIs and SDKs for building interactive features such as chat, live updates, presence detection, geolocation tracking, and IoT device control in mobile, web, and embedded applications. Founded in 2010 and headquartered in San Francisco, the platform operates the worlds largest event-driven network, connecting 800 million devices across 2,000-plus customers with 3 trillion API transactions per month at under 30 milliseconds global latency and a 99.999 percent uptime SLA. The platform serves over 40 industries with measurable scale metrics: Sports Media and Entertainment processes 212 million requests per minute for live fan engagement during broadcasts. Gaming connects over 35 million monthly active players through real-time multiplayer communication. Digital Healthcare serves 3.7 million patients monthly with HIPAA-compliant telemedicine features. eCommerce handles 87 million monthly bids for live auction platforms. Fintech processes over 10 million monthly transactions with real-time market data streaming. Transportation and Delivery coordinates 137.7 million monthly deliveries with live driver tracking and dispatch routing. Notable customers include DAZN for live sports broadcasting chat, Ticketmaster for real-time event notifications, DocuSign for document signing presence, Scopely for mobile gaming chat, Swiggy for food delivery tracking, Logitech for device telemetry, Autodesk for collaboration features, Yelp for location-based alerts, and ACS for call center automation. The PubNub Illuminate module provides no-code real-time analytics, automated decisioning, and event stream processing. AI Chat Moderation blocks toxic messages in real time. The MCP Server enables AI agents to build and debug real-time applications. Free tier includes 200 monthly active users with full SDK access.