Pusher (service)

Pusher (service)
Name	Pusher
Type	Private
Industry	Software
Founded	2010
Headquarters	London, United Kingdom
Products	Real-time APIs, WebSocket services

Pusher (service) is a hosted real-time messaging platform that provides APIs for building interactive, event-driven applications. The service offers publish/subscribe channels, WebSocket-based connections, and presence detection to enable live updates in web and mobile applications. It targets developers integrating live chat, notifications, collaboration, and streaming data into applications used across startups, enterprises, and open-source projects.

Overview

Pusher competes in the realtime messaging and cloud services space alongside providers and projects such as Amazon Web Services, Microsoft Azure, Google Cloud Platform, Cloudflare, and Firebase. Its developer-facing APIs and client libraries interoperate with frameworks and tools including React (JavaScript library), Angular, Vue.js, Ruby on Rails, Django, Node.js, Laravel, and Spring Framework. The platform emphasizes low-latency delivery, cross-platform SDKs for iOS, Android (mobile operating system), and web browsers, and integrations with orchestration and automation systems like Docker, Kubernetes, GitHub, and Jenkins.

History

Pusher was founded in 2010 in London amid rising demand for real-time web experiences driven by projects such as Twitch (service), Skype, and live features in Facebook. Early adoption grew among developers building features similar to those in Gmail, Trello, and Slack. Over time, Pusher evolved its offerings in parallel with protocols and standards developed by organizations such as the IETF and communities around WebSocket, HTTP/2, and WebRTC. The company navigated competition from platform entrants like Socket.IO and SignalR, and aligned with trends in cloud-native development promoted by entities such as Cloud Native Computing Foundation and standards work from the W3C.

Architecture and Technology

Pusher’s architecture is based on a distributed, event-driven model that uses persistent connections over protocols standardized by groups including the IETF and the W3C. At its core are message brokers, channel multiplexers, and edge gateways that interoperate with infrastructure components like NGINX, HAProxy, and service meshes such as Istio. Client libraries implement fallback strategies influenced by implementations from SockJS and concepts from Comet (programming) to maintain connectivity across browsers such as Google Chrome, Mozilla Firefox, Safari, and Microsoft Edge. For scaling and observability, Pusher integrates with monitoring and logging ecosystems such as Prometheus, Grafana, Elasticsearch, Kibana, and tracing tools like Jaeger and Zipkin.

Features and Integrations

Pusher provides features including publish/subscribe channels, presence channels, encrypted private channels, and event webhooks used in conjunction with CI/CD platforms like CircleCI and Travis CI. The service offers SDKs and libraries for languages and runtimes such as JavaScript, TypeScript, Ruby (programming language), Python (programming language), Go (programming language), PHP, and Java (programming language). Integrations extend to messaging and queuing systems like RabbitMQ and Apache Kafka, and authentication systems using OAuth 2.0 and JWT. Pusher also supports developer workflows involving Postman, cURL, and IDEs such as Visual Studio Code and JetBrains IntelliJ IDEA.

Use Cases and Applications

Common use cases include live chat features akin to Slack, collaborative editing similar to Google Docs, live dashboards reminiscent of Datadog and New Relic, notification systems in the style of Twitter, and multiplayer game synchronization comparable to Unity (game engine). Enterprises employ the platform for customer support tools used by organizations like those deploying Zendesk or Freshdesk, and for financial tickers and trading dashboards related to firms in the vein of Bloomberg and Reuters. Startups and open-source projects leverage Pusher to implement features seen in apps showcased at TechCrunch Disrupt and accelerators such as Y Combinator.

Pricing and Licensing

Pusher’s commercial model follows typical cloud SaaS patterns found at Heroku and DigitalOcean, offering tiered plans including free trial tiers, usage-based billing, and enterprise contracts with service-level agreements comparable to offerings from Salesforce and ServiceNow. Licensing for client SDKs often uses permissive open-source licenses influenced by initiatives from GitHub and foundations such as the Apache Software Foundation and MIT License-style norms to maximize developer adoption. Billing and account workflows integrate with payment and invoicing services like Stripe and Chargebee.

Security and Compliance

Security features include TLS encryption comparable to best practices advocated by Let's Encrypt and certificate authorities, authentication using OAuth 2.0 and JSON Web Token, and end-to-end encryption options for private channels inspired by protocols discussed in IETF drafts. For compliance, Pusher aligns with standards and regulatory frameworks such as ISO/IEC 27001, SOC 2, and data protection regimes influenced by instruments like the General Data Protection Regulation and guidance from authorities in jurisdictions including United Kingdom and United States. Operational controls draw on practices from NIST guidance and auditing approaches used by firms certified to PCI DSS where relevant.

Category:Realtime web services