Lightstreamer (Weswit Srl)
- Headquarters
- Via Panfilo Castaldi, 11, 20124 Milan, Italy
- Phone
- (718) 618-4493
Lightstreamer (formerly Weswit Srl) is an Italian technology company that specializes in real-time data streaming over the internet. Founded in the early 2000s in Milan, the company developed one of the first implementations of server-push technology for web browsers, which evolved into the Lightstreamer event broker. Today, the platform is used by over 500 enterprise customers, reaching more than 100 million end-users across finance, online trading, iGaming, and media. Lightstreamer's intelligent streaming engine automatically handles proxies, firewalls, network congestion, and disconnections, ensuring sub-millisecond data delivery. The company rebranded from Weswit Srl to Lightstreamer Srl in 2022 to align corporate identity with its flagship product. Major clients include Morgan Stanley, NASA, and Sony, and the platform integrates with Kafka, MQTT, and custom data sources. Lightstreamer is backed by Par-Tec Spa and maintains a global partner network, positioning itself as a critical infrastructure provider for low-latency, internet-scale real-time applications.
Detailed Review
History and Background
Lightstreamer began as a research project at the end of 2000, when its founders created one of the earliest implementations of real-time data push to HTML pages. The technology was later productized as the Lightstreamer server, and the corporate entity Weswit Srl was established shortly thereafter in Milan, Italy. For nearly two decades the company operated under the Weswit name, but in 2022 it formally rebranded to Lightstreamer Srl to unify product and corporate identity. The company is subject to direction and coordination by Par-Tec Spa, an Italian holding company.
Product & Technology
The core product is the Lightstreamer Broker, an event broker optimized for the internet's unreliable nature. Unlike traditional message brokers designed for LANs, Lightstreamer's "Intelligent Streaming" engine automatically adapts to proxies, firewalls, unstable connections, and bandwidth fluctuations. It supports WebSocket, Comet, and HTTP streaming protocols and has been benchmarked handling up to 2 million updates per second with sub-millisecond processing. The product family includes the broker, a Kubernetes Helm Chart for containerized deployments, and open-source client SDKs for Java, .NET, JavaScript, iOS, Android, and others. It integrates natively with Apache Kafka, MQTT, and custom data sources via an adapter architecture.
Market & Use Cases
Lightstreamer is a proven technology in financial services and iGaming, where real-time price streaming and order execution are critical. Customers include trading platforms like ActivTrader and adesso, investment banks such as Morgan Stanley, and gaming operators. It also serves the media sector, with clients like NASA and Sony for live event data. The company is listed on iGamingSuppliers.com, positioning itself directly within the gambling technology supply chain. Reference clients report high uptime, low operational costs, and fast developer onboarding.
Corporate Structure & Licensing
Lightstreamer operates from a coworking space in Milan and employs a growing team of engineers, though exact headcount is not disclosed. The software is offered under a proprietary commercial license, with an Enterprise Edition that includes clustering, high availability, and enterprise support. The company complies with GDPR and holds an Italian VAT number. It maintains a global partner network of technology providers, system integrators, and resellers.
Recent Developments
In 2022, the legal name change from Weswit Srl to Lightstreamer Srl was completed. The company continues to invest in product innovation, introducing the Lightstreamer Helm Chart and enhanced Kafka integration. Ongoing webinars, tradeshow appearances, and partnership expansions are regularly announced on its news and events pages.
Key Products
Lightstreamer Broker
The core event broker server for real-time data streaming over the internet, handling WebSocket, Comet, and HTTP streaming with automatic fallback, congestion control, and firewall traversal.
Lightstreamer Helm Chart
A Kubernetes deployment package that enables declarative configuration, scaling, and management of Lightstreamer Broker in containerized environments.
Lightstreamer Client SDKs
Open-source libraries for building client-side applications in Java, .NET, JavaScript (browser and Node.js), iOS, Android, and other platforms.
Lightstreamer Adapters
Connectors and APIs for integrating with Apache Kafka, MQTT, and custom data sources, allowing seamless ingestion of streaming data.
Lightstreamer Enterprise Edition
The commercial version with advanced features such as clustering, high availability, and enterprise support.