Ably (UK)

Ably is a realtime infrastructure platform that provides developer-friendly APIs and SDKs to power live messaging, chat, dashboards, notifications, collaborative apps, and realtime data sync. Its product suite includes Pub/Sub, LiveSync, Chat, Spaces, LiveObjects and solutions for asset tracking, with guarantees for low latency, message delivery and high reliability at scale. Ably runs a global network engineered for uptime and performance, and offers enterprise features and SLAs for production workloads. Pricing includes a free forever tier plus usage-based consumption plans (per-minute or per-MAU) and custom enterprise packages.