What MQTT.Cool does

MQTT.Cool is a product/brand of Lightstreamer Srl, an Italian private limited company (Srl, P.I. 03585950102) that builds real-time data streaming infrastructure. The flagship offering is the Lightstreamer MQTT Connector, an intelligent proxy that sits in front of an organization's existing MQTT broker to extend its data to browser-based and mobile applications. The connector remaps MQTT traffic over Lightstreamer's WebSocket and HTTP-based protocol, addressing MQTT's well-known limitations with web proxies and corporate firewalls, and adds network-optimization features such as adaptive throttling, data resampling and conflation, bandwidth caps, per-topic frequency limits, reconnection management, broker multiplexing, and a Paho-like JavaScript API for browsers and Node.js.

The technical foundation is the Lightstreamer Broker, described as a 'last-mile' data delivery platform using a staged event-driven architecture with asynchronous I/O to support millions of concurrent clients. Beyond MQTT, Lightstreamer offers a Kafka Connector (extending Kafka topics to web/mobile), a JMS Connector (bridging IBM MQ and ActiveMQ to web), and a sub-brand called Now4real for live group chat and presence on websites. The customer base spans financial trading (eToro, Fidelity, Morgan Stanley, UBS, eTrade), aerospace (NASA), media and entertainment (Sony), gaming (IG), logistics (OOCL, Delta), and security software (McAfee), with use cases including real-time trading dashboards, IoT device control, remote telemetry, multiplayer game sync, and live sports/event updates.

Commercially, MQTT.Cool/Lightstreamer runs a hybrid go-to-market model: free trial downloads, developer documentation, live demos at demos.lightstreamer.com, and an active community forum drive self-serve developer adoption, while 'Contact sales' caters to enterprise deployments. Pricing is not publicly disclosed. The company is privately held with no disclosed funding rounds, no public revenue figures, and no published headcount, and operates as an independent Italian Srl with no parent or subsidiary structure disclosed.

Name

MQTT.Cool

Legal name

Lightstreamer Srl

Website

https://mqtt.cool

Company type

Private

Operating status

Operating

Short description

MQTT.Cool is the Lightstreamer MQTT Connector, an intelligent proxy from Italy's Lightstreamer Srl that bridges MQTT brokers with browser and mobile apps via WebSocket, serving enterprise clients in financial services, aerospace, logistics, media, and gaming.

Ownership category

akta.pro rank

Product category

IoT Real-Time Data Streaming Middleware

NAICS

Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)

SIC

Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

WebRTC & In-Browser Voice/Video (HDAIAHAH)

Keywords

• Real-time data streaming
• MQTT broker integration
• IoT web connectivity
• Publish-subscribe middleware
• Live data dashboards

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations

Distribution channels3 records

Marketing channels6 records

Core offering

MQTT.Cool is the Lightstreamer MQTT Connector, an intelligent proxy placed in front of an existing MQTT broker to extend its functionality with web-friendly, network-optimized features. It remaps the MQTT protocol over Lightstreamer's WebSocket and HTTP-based stack, enabling browser and Node.js clients to publish and subscribe to MQTT topics through a Paho-like JavaScript API. It adds adaptive throttling, bandwidth caps, conflation, frequency management, reconnection backpressure, security hooks, and multi-broker multiplexing.

Product overview

Lightstreamer offers a platform-plus-modules architecture centered on the Lightstreamer Broker (the core real-time data delivery platform) complemented by specialized connector products. The portfolio includes the Lightstreamer MQTT Connector (the primary product for this analysis), which acts as an intelligent proxy bridging MQTT brokers with web technologies; the Kafka Connector for extending Kafka topics to web/mobile; the JMS Connector for IBM MQ/ActiveMQ integration; and Now4real for website visitor engagement. All connectors leverage the Lightstreamer Broker's WebSocket and HTTP-based protocol for reliable last-mile data delivery.

Differentiator

Problem solved

Functional benefit

Brands

• Lightstreamer MQTT Connector: An intelligent proxy that seamlessly integrates MQTT with browser-based applications, enabling easy subscribing and publishing to MQTT topics.
• Lightstreamer Kafka Connector
• Lightstreamer JMS Connector
• Now4real

Products and services

• Lightstreamer MQTT Connector (MQTT.Cool) An intelligent proxy placed in front of any MQTT broker (Mosquitto, HiveMQ, EMQX, VerneMQ, AWS IoT Core, Azure IoT Hub) that remaps MQTT over Lightstreamer's WebSocket and HTTP-based protocols, exposing a Paho-like JavaScript API for browsers and Node.js. Adds adaptive throttling, conflation, bandwidth management, frequency management, reconnection management, MQTT broker multiplexing, and Security Hooks for custom authentication and authorization. Targets enterprise developers and platform teams in IoT, financial services, logistics, aerospace, gaming, and media who need real-time MQTT data on the web.

Quantifiable outcome

• 60% reduction in infrastructure costs
• +3 more outcomes

Named customers11 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature9 records

Partnerships

Six partnerships are on record, tiered core.

• MosquittocoreTechnology or IntegrationMosquitto is an open-source MQTT broker that Lightstreamer MQTT Connector integrates with, allowing clients to access Mosquitto broker topics through the Lightstreamer web protocol bridge.
• HiveMQcoreTechnology or IntegrationHiveMQ enterprise MQTT broker integrates with Lightstreamer MQTT Connector for extending MQTT data to web and mobile clients.
• EMQXcoreTechnology or IntegrationEMQX MQTT broker integrates with Lightstreamer MQTT Connector, enabling seamless data streaming from EMQX to web applications.
• VerneMQcoreTechnology or IntegrationVerneMQ MQTT broker is supported by Lightstreamer MQTT Connector for extending MQTT capabilities to web clients.
• AWS IoT CorecoreTechnology or IntegrationAmazon Web Services IoT Core integrates with Lightstreamer MQTT Connector for extending AWS IoT data to web and mobile applications.
• Azure IoT HubcoreTechnology or IntegrationMicrosoft Azure IoT Hub integrates with Lightstreamer MQTT Connector for delivering Azure IoT data to web and browser-based clients.

Recent moves5 records

Expansion highlights5 records

Direct peers

• VerneMQ: Open-source MQTT broker explicitly supported by MQTT.Cool today, but also a potential direct competitor for MQTT-to-client delivery in simpler deployments.
• Ably: Real-time messaging and data streaming platform for web and mobile, offering pub/sub and presence with managed delivery. Highly comparable business model and target customers (real-time dashboards, IoT, trading).
• EMQX: Open-source/enterprise MQTT broker supporting the same MQTT-to-web use case. Competes for the same IoT-to-browser streaming problem MQTT.Cool addresses.
• Pusher: Real-time messaging service (now part of MessageBird/Bird) targeting web and mobile apps with WebSocket-based pub/sub. Closely aligned delivery model and developer-led GTM.
• HiveMQ: Enterprise MQTT broker that MQTT.Cool integrates with, but which could also ship native web-bridging. Directly comparable in the MQTT-to-application data path.
• PubNub: Managed real-time infrastructure for chat, IoT, and live dashboards. Competes directly for developers building browser-based real-time experiences over MQTT-equivalent protocols.

Broad incumbents

• AWS IoT Core: Managed cloud IoT platform that MQTT.Cool integrates with, but which could subsume web-bridging functionality within its broader IoT portfolio. Represents both a partner channel and an existential incumbent threat.
• Microsoft Azure IoT Hub: Cloud IoT platform integrated with MQTT.Cool, but also a broader incumbent offering device-to-cloud-to-application messaging natively.

Emerging players

• Centrifugal: Open-source real-time messaging server with WebSocket and SSE support for browser and mobile clients. Lower-cost alternative for simpler deployments.
• Mosquitto: Open-source lightweight MQTT broker. A core integration partner, but also a baseline competitor where users need only basic MQTT-over-WebSocket functionality.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about MQTT.Cool