Choose Your Client Path
Start with the client that matches your use case, then dive into targeted docs.
HiveMQtt MQTT Client
Best for most applications
Use the full-featured MQTT 5 client with subscription tracking, convenient callbacks, and production-ready defaults.
Explore HiveMQttRawClient MQTT Client
Best for performance-critical scenarios
Use the low-level RawClient API for minimal overhead, direct packet handling, and custom message routing.
Explore RawClientSparkplug Client
Best for industrial Sparkplug B 3.0
Build Host Applications and Edge Nodes with Sparkplug topic/payload support powered by HiveMQtt.Sparkplug.
Explore SparkplugWhy Choose HiveMQtt?
Built by the MQTT experts at HiveMQ for production-grade IoT applications
MQTT 5.0 Ready
Fully compliant with the latest MQTT 5.0 specification. Supports all QoS levels, retained messages, and session management.
High Performance
Asynchronous design optimized for high-throughput and low-latency. Benchmarked for production IoT workloads.
Enterprise Security
TLS/SSL, X.509 certificates, SecureString password storage, and secure WebSocket (wss://) support.
Flexible Transport
TCP and WebSocket connections (ws:// and wss://). Works across firewalls and HTTP-only environments.
Developer Friendly
Intuitive API with smart defaults, builder patterns, and extensive event system for fine-grained control.
Multi-Platform
Supports .NET 6, 7, 8, 9, and 10. Works on Windows, Linux, macOS, and containerized environments.
Simple, Intuitive API
Get connected and start publishing messages in minutes. The HiveMQtt client features a clean, builder-based API that makes MQTT integration straightforward.
- ✓ Async/await pattern throughout
- ✓ Fluent builder configuration
- ✓ Event-driven message handling
- ✓ Automatic reconnection support
- ✓ Per-subscription handlers
using HiveMQtt.Client;
using HiveMQtt.MQTT5.Types;
// Connect to HiveMQ Cloud (or any MQTT broker)
var options = new HiveMQClientOptionsBuilder()
.WithBroker("your-cluster.hivemq.cloud")
.WithPort(8883)
.WithUseTls(true)
.WithUserName("your-username")
.WithPassword("your-password")
.Build();
var client = new HiveMQClient(options);
// Handle incoming messages
client.OnMessageReceived += (sender, args) => {
Console.WriteLine($"Received: {args.PublishMessage.PayloadAsString}");
};
await client.ConnectAsync();
await client.SubscribeAsync("sensors/temperature");
await client.PublishAsync("sensors/temperature", "23.5°C");
Built for Real-World IoT
From edge devices to enterprise systems, HiveMQtt powers mission-critical applications
Industrial IoT
Connect factory equipment, sensors, and PLCs to your enterprise systems.
Smart Buildings
Build automation systems for HVAC, lighting, and energy management.
Connected Vehicles
Real-time telemetry and fleet management for automotive applications.
Healthcare
Medical device connectivity and patient monitoring systems.
Powered by HiveMQ
HiveMQ is the enterprise MQTT platform trusted by leading organizations worldwide. With 99.999% uptime, support for millions of concurrent connections, and seamless integration with enterprise systems, HiveMQ is the foundation for your IoT success.
Resources & Community
Everything you need to succeed with MQTT and HiveMQ
Ready to Build?
Start building your IoT application today with HiveMQtt and HiveMQ Cloud.
Free tier includes up to 100 device connections — no credit card required.