Best IoT Development Tools in 2026
Updated
In short: Arm Keil MDK is ranked #1 of 13 as of 4 October 2026, ahead of PlatformIO IDE and Wokwi. The best-ranked option with a free plan is PlatformIO IDE. The lowest first paid tier on this page is Wokwi at €5.60/mo.
Building for connected devices means weighing tools against the boards, protocols, languages, and deployment targets your project needs. Compared on those details, the entries also show whether firmware debugging and a device simulator are available, alongside free-plan availability and paid-from pricing. Arm Keil MDK, PlatformIO IDE, and Wokwi are among the tools to compare; Arduino IDE, ESP-IDF Extension for VS Code, and MPLAB X IDE are also included. Check the listed support for your target hardware and development workflow, then consider how each tool’s debugging, simulation, and deployment options line up with the work ahead.
13 IoT development tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
| # | App | Score | From | Free plan | Paid from | Supported languages | Device simulator | Firmware debugging | Supported protocols | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Arm Keil MDK | 6.7 | $99/mo | Yes | — | — | — | — | — | View |
| 2 | PlatformIO IDE | 6.6 | $20.75/mo | Yes | — | — | — | — | — | View |
| 3 | Wokwi | 6.6 | €5.60/mo | Yes | — | Arduino (C/C++), MicroPython, CircuitPython, Rust | Yes | Yes | WiFi, HTTP, HTTPS, WebSocket, MQTT, NTP, CoAP, DNS, TCP, UDP, UART, I2C, SPI | View |
| 4 | Arduino IDE | 6.5 | Free | Yes | — | — | — | — | — | View |
| 5 | ESP-IDF Extension for VS Code | 6.5 | Free | Yes | — | — | — | — | — | View |
| 6 |  MPLAB X IDE | 6.5 | Free | Yes | — | — | — | — | — | View |
| 7 | Particle Web IDE | 6.4 | $299/mo | Yes | 299 /mo | C, C++ | No | Yes | — | View |
| 8 | Code Composer Studio | 6.3 | — | Yes | — | — | — | — | — | View |
| 9 | Digi IoT Device Simulator | 6.3 | — | Yes | — | Python | Yes | — | — | View |
| 10 | Simplicity SDK | 6.3 | — | Yes | — | C; C++ | — | — | Bluetooth LE; OpenThread; Wi-Fi; proprietary wireless protocols (RAIL, Alpha integration, device-dependent) | View |
| 11 | e² studio | 6.2 | — | Yes | — | — | — | — | — | View |
| 12 | Renesas Flexible Software Package | 6.1 | — | Yes | — | — | — | — | — | View |
| 13 | STM32CubeIDE | 6.1 | — | Yes | — | — | — | — | — | View |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which IoT development tool is ranked first on Freedom251?
Arm Keil MDK is ranked #1 of 13 with a score of 6.7. PlatformIO IDE is second and Wokwi third.
How many of these have a free plan?
7 of the 13 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Wokwi has the lowest first paid tier we found: €5.60/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.