Best Event Brokers for JavaScript

Ably is the definitive realtime experience platform. We power more WebSocket connections than any other pub/sub platform, serving over a billion devices monthly. Businesses trust us with their critical applications like chat, notifications and broadcast - reliably, securely and at serious scale.

PubNub is a cloud-based real-time communication platform designed to help developers build applications that require immediate data exchange and synchronized user experiences. Its publish/subscribe messaging infrastructure delivers information between connected applications, users, and devices through globally distributed servers. The platform supports real-time chat, notifications, collaborative editing, multiplayer games, live event interactions, and IoT communication. Presence detection capabilities allow applications to monitor connected users, track online status, and respond to changes in device or user activity. Message persistence enables developers to store conversation histories, retrieve previous messages, and recover information after connection interruptions. PubNub Functions provides serverless processing for validating, filtering, transforming, and enriching messages as they move through the network. Its App Context functionality stores user profiles, channel information, and membership data while synchronizing changes across connected clients. Additional capabilities include access management, push notifications, file sharing, analytics, and integrations with services such as Kafka and AWS. PubNub provides SDKs for multiple programming languages and development environments, allowing organizations to implement real-time functionality without building and maintaining dedicated messaging infrastructure.

Lightstreamer acts as an event broker that is finely tuned for the internet, providing a smooth and instantaneous flow of data across online platforms. In contrast to conventional brokers, it adeptly manages the challenges posed by proxies, firewalls, disconnections, network congestion, and the inherent unpredictability of web connectivity. Its advanced streaming capabilities ensure that real-time data delivery is maintained, always finding efficient and reliable pathways for your information. Lightstreamer's technology is not only well-established but also at the cutting edge, continually adapting to remain a leader in the field of innovation. With a solid history and extensive practical experience, it guarantees dependable and effective data transmission. Users can count on Lightstreamer to provide unmatched reliability in any situation, making it an invaluable tool for real-time communication needs. In an ever-evolving digital landscape, Lightstreamer stands out as a trusted partner for delivering data seamlessly.