MQTT Explorer vs MQTTX on macOS: Native vs Electron
MQTTX by EMQ is the most popular MQTT client today: free, open source, cross-platform, and genuinely good. If you want one answer for Windows, Linux, and macOS, install MQTTX and move on. This page is for the Mac user who lives in a topic tree eight hours a day and wonders what a native Rust client does differently from an Electron one.
The honest comparison
| MQTTX (EMQ) | MacTools MQTT Explorer | |
|---|---|---|
| Price | Free, open source | $24 one-time |
| Platform | Windows, Linux, macOS (Electron) | macOS, Windows, Linux (Rust + Tauri, Apple Silicon native) |
| Runtime | Bundled Chromium + Node.js | Compiled Rust + system WebKit |
| MQTT 3.1.1 / TLS | Yes | Yes |
| MQTT 5.0 | Yes | Not yet |
| Built-in broker for local testing | No - run Mosquitto or EMQX | Yes, one click |
| Benchmark and scripting tools | Yes | No |
Where MQTTX wins
Breadth and price. It has connection sharing, a benchmark tool, MQTT over WebSocket and QUIC experiments, schemas, and a plugin ecosystem. It is cross-platform, so one tool covers your whole team. And it is free - if your MQTT sessions are short and occasional, that is the end of the comparison.
Where a native client wins on macOS
Broker work is a watching job: you leave a connection open all day, filtered to a topic subtree, watching values tick. That is the workload where carrying a second browser engine around all day is the least appealing. MacTools MQTT Explorer does the MQTT work in compiled Rust and draws its window with the WebKit engine already built into macOS, so there is no bundled Chromium to download, update or keep in memory.
The second native-only feature is the built-in broker. Testing retain behavior, last-will messages, or a clean-session edge case normally means standing up Mosquitto in Docker first. With a one-click local broker, publish and subscribe happen in the same window, on localhost, in seconds.
Stay with MQTTX if...
You need MQTT 5.0, the benchmark tool or scripting, your sessions are short, or free is a hard requirement. It is the best free MQTT client, full stop.
Switch to MacTools MQTT Explorer if...
You debug IoT fleets on a Mac all day: big retained trees, QoS edge cases, broker migrations. One-time $24, native Apple Silicon, and a built-in broker one click away.
Try the Native macOS MQTT Client
MacTools MQTT Explorer for macOS. Topic tree, built-in broker for local testing, MQTT 3.1.1 and TLS. No Electron. $24 one-time.
Get MQTT Explorer: $24Frequently Asked Questions
Is MQTTX free?
Yes. MQTTX by EMQ is free, open source, and cross-platform (Electron), with MQTT 3.1.1 and 5.0, TLS, WebSocket connections, and a benchmark tool. It is an excellent client and the default recommendation for Windows and Linux users.
Why pay for a native MQTT client on macOS?
For the same reason people pay for native Mac apps in every category: memory and responsiveness. MQTTX is Electron, so every install carries its own copy of Chromium and Node.js. MacTools MQTT Explorer is a native Rust app built with Tauri, which uses the macOS system WebKit view instead of bundling Chromium, with the MQTT client and broker running in compiled Rust.
Does MQTT Explorer include a broker?
Yes. A built-in broker runs locally so you can publish and subscribe on one machine with zero infrastructure - useful for testing retain behavior, last-will messages, and retained-topic trees without standing up Mosquitto or EMQX first.
Do both tools handle MQTT 5 and TLS?
TLS, yes: both support TLS with certificates and username/password authentication. MQTT 5, no: MQTTX supports MQTT 5.0, while MacTools MQTT Explorer speaks MQTT 3.1.1 today. If you need MQTT 5 features, use MQTTX.
Which should I choose for Windows or Linux?
MQTTX. It is cross-platform, free, and well maintained by EMQ. MacTools MQTT Explorer exists for the macOS native experience; on other platforms there is nothing native to be native about.
Building the broker side too?
If you also need managed broker infrastructure for your devices, Voltrus Broker runs dedicated MQTT broker instances with per-tenant isolation - starting at $9/month.