emqx / emqx

# EMQX
EMQX is the world's most scalable and reliable MQTT platform, designed for high-performance, reliable, and secure IoT data infrastructure. It supports MQTT 5.0, 3.1.1, and 3.1, as well as other protocols like MQTT-SN, CoAP, LwM2M, and MQTT over QUIC. EMQX enables you to connect millions of IoT devices, process and route messages in real time, and integrate with a wide range of backend data systems. It's ideal for applications in AI, IoT, Industrial IoT (IIoT), connected vehicles, smart cities, and beyond.
**Starting from v5.9.0, EMQX has unified all features from the previous Open Source and Enterprise editions into a single, powerful offering with the Business Source License (BSL) 1.1.**
If you want to understand why we made the change, please read this blog post.
Please go to the License section for more details about BSL 1.1.
## Key Features
EMQX delivers a powerful set of capabilities for modern connected systems:
### Comprehensive Protocol Support
- Full MQTT v5.0, v3.1.1, and v3.1 support.
- MQTT over QUIC: Leverage the benefits of QUIC for faster connection establishment, reduced head-of-line blocking, and seamless connection migration.
- Support for other IoT protocols like LwM2M, CoAP, MQTT-SN, and more through gateways.
### Massive Scalability & High Availability
- Connect 100M+ of concurrent MQTT clients with a single cluster.
- Process millions of messages per second with sub-millisecond latency.
- Masterless clustering for high availability and fault tolerance.
- Seamless global communication with EMQX Cluster Linking.
### Powerful Rule Engine & Data Integration
- SQL-based Rule Engine to process, transform, enrich, and filter in-flight data.
- Seamless data bridging and integration with 50+ cloud services and enterprise systems, including:
 - **Message Queues**: Kafka, RabbitMQ, Pulsar, RocketMQ, etc.
 - **Databases**: PostgreSQL, MySQL, MongoDB, Redis, ClickHouse, InfluxDB, etc.
 - **Cloud Services**: AWS Kinesis, GCP Pub/Sub, Azure Event, Confluent Cloud, and more.
- Webhook support for easy integration with custom services.
### Message Queue
- Reliable message queuing for asynchronous and decoupled communication.
- Extends MQTT with durable message storage, configurable queue lifecycle, TTL, and size limits, ensuring messages are preserved until consumption.
- Supports load-balanced consumption and optional last-value semantics, allowing queues to retain only the most recent message for each topic when needed.
### Flow Designer
- Drag‑and‑drop canvas to orchestrate real‑time data pipelines with zero code, using nodes for rules, integrations, and AI tasks.
### Smart Data Hub
- Schema Registry: Define, store, and manage data schemas to ensure consistency.
- Schema Validation: Validate incoming data against registered schemas to maintain data integrity.
- Message Transformation: Convert data between different formats and structures to facilitate seamless integration.
### AI Processing & Integration:
- Native AI processing cap