MQTT Explorer vs MQTT Explorer: Native Mac MQTT Without Electron
There are two tools called "MQTT Explorer." MQTT Explorer (the Electron app by Thornett Consulting) is the free, cross-platform GUI everyone knows. MacTools MQTT Explorer is a native macOS app: Apple Silicon native, <50MB RAM, starts instantly.
If you are on a Mac and spend more than a few hours a month on MQTT, the question is no longer "does it work?" It is "does it cost $4 in RAM and 10 seconds to launch, every single time you open it?" Here is the comparison.
The Electron Problem
MQTT Explorer is built with Electron. That means every window is a Chromium instance. On macOS that translates to:
- ~200-400MB RAM at idle: for a tool that shows a topic tree.
- 5-10 second launch time: Chromium needs to spin up before you can browse.
- No Apple Silicon native build: it runs under Rosetta, slower and hotter.
- No built-in broker: you install Mosquitto separately, configure it, then point the client at it.
Feature Comparison
| Capability | MacTools MQTT Explorer | MQTT Explorer (Electron) |
|---|---|---|
| Native macOS / Apple Silicon | Yes | Electron + Rosetta |
| RAM at idle | <50MB | 200-400MB |
| Launch time | Instant | 5-10s |
| Built-in broker | Yes, toggle on | Mosquitto required |
| Topic tree browser | Yes | Yes |
| Payload view (JSON/XML/hex) | Yes | Yes |
| Retained message view | Yes | Yes |
| Connection profiles | Yes | Yes |
| data-s-event telemetry tracking | Yes | No |
| Price | $14.99 one-time | Free |
So Why Pay $14.99?
If you open MQTT Explorer twice a day, the Electron overhead costs you ~30 seconds of launch time and ~300MB of RAM that could be running your actual work. Native means instant: you open it, scan the topic tree, debug a payload, close it. No waiting. For $14.99 one-time, that pays for itself in the first week if you use MQTT regularly.
The other big win is the built-in broker. On a Mac without Homebrew, installing Mosquitto is a 15-minute exercise. With MacTools MQTT Explorer, you toggle the broker on and start testing immediately, perfect for IoT development on a laptop.
When to Use Which
Keep MQTT Explorer (Electron) if…
You are on Windows/Linux, need a free tool, and don't mind the Electron overhead. It is feature-complete for basic broker/client work.
Switch to MacTools MQTT Explorer if…
You are on a Mac and use MQTT daily. You want instant launch, low memory, native Apple Silicon, and a built-in broker, all without Homebrew or Mosquitto. One-time $14.99.
Get Native MQTT on Mac
MacTools MQTT Explorer. Native Apple Silicon broker + client. Built-in broker, sub-50MB RAM, instant launch. No Electron, no Mosquitto install. $14.99 one-time.
Get MQTT Explorer ($14.99)Frequently Asked Questions
Is MacTools MQTT Explorer a good MQTT Explorer alternative for Mac?
Yes: if you want a native macOS MQTT client without Electron overhead. MacTools MQTT Explorer is Apple Silicon native, starts instantly, uses <50MB RAM, and includes a built-in broker so you can test end-to-end without Mosquitto installed.
Does MQTT Explorer work natively on macOS?
MQTT Explorer (Thornett) is built with Electron. It runs on macOS but is not native: it carries a Chromium runtime, uses ~200-400MB RAM at idle, and starts slowly. MacTools MQTT Explorer is a native Rust app: instant launch, sub-50MB RAM, Apple Silicon native.
What about using mosquitto_pub/sub as a free alternative?
mosquitto_pub and mosquitto_sub are CLI tools: free and powerful. But they offer no GUI, no topic tree browser, no payload inspection, no retained-message viewer, no connection management. For one-off publishes they work; for daily MQTT development, a GUI saves hours.
Can I run a local broker with MQTT Explorer?
MQTT Explorer (Electron) does not include a broker: you need to install Mosquitto separately. MacTools MQTT Explorer has a built-in broker. Toggle it on and start publishing, subscribing, and testing payloads without any external dependencies.
Why not just use the terminal?
The terminal works for simple tasks but you lose the topic tree browser, the retained message view, the payload format decoder (JSON/XML/base64), and the connection profile manager. If you connect to more than one broker or debug payloads regularly, the GUI is worth $14.99.
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