Free and open first
Best IoT Development Tools in 2026
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.
- 16 apps
- Research read 28 Sept 2026
- How the order is worked out
- 1
Arduino IDE
Free plan Open source AndroidAPIExtension+5Arduino IDE combines editing and debugging tools with CLI support for building sketches and managing boards and libraries. Review the stated as-is terms before downloading.
- 2
Arm Keil MDK
Free plan APIExtensionLinux+3Keil MDK combines an IDE, CLI, compiler, and separately addable software packs for embedded development.
- 3
ESP-IDF Extension for VS Code
Free plan ExtensionLinuxMac+1The extension provides a broad ESP-IDF development workflow inside Visual Studio Code, from project setup to flashing and debugging.
- 4
e² studio
Free plan LinuxMacWindowse² studio provides project setup, editing and debugging tools for Renesas MCU development at no charge. Developers need to obtain compilers separately and check host-specific family support.
- 5
MPLAB X IDE
by MPLAB X IDEFree plan LinuxMacWindowsMPLAB X IDE brings development, debugging and production programming tools together for supported Microchip targets at no cost.
- 6
PlatformIO IDE
Free plan ExtensionLinuxMac+2PlatformIO IDE brings embedded build, upload, monitoring and debugging tools into a VSCode-based workflow. Users considering CLion should note that its integration is experimental.
- 7
STM32CubeIDE
Free plan ExtensionLinuxMac+1STM32CubeIDE combines editing, build, and debugging tools for STM32 development across two variants. Check which variant supports your target and note the 64-bit operating-system requirement.
- 8
Renesas Flexible Software Package
Free plan LinuxMacWindowsFSP brings drivers, configuration tools, middleware, and security capabilities together for Renesas RA MCU development. Check the stated tool and installer requirements before choosing a version.
- 9
Wokwi
Free plan APIExtensionLinux+3Wokwi combines microcontroller simulation with firmware debugging across several languages, boards, and protocols.
- 10
Code Composer Studio
Free plan LinuxMacWeb+1 - 11
Arm Virtual Hardware
Free plan LinuxWebWindows - 12
Digi IoT Device Simulator
Free plan LinuxMacWindowsChoose Digi IoT Device Simulator if you work with Digi ConnectCore-based devices and need simulation plus device provisioning or management.
- 13
Eclipse 4diac
Free plan LinuxMacWindowsChoose Eclipse 4diac if you need a free environment for C++ or IEC 61499 function block work with firmware debugging.
- 14
Particle Web IDE
Free plan WebParticle Web IDE combines browser-based C and C++ development with firmware debugging for Particle Device OS devices. Its plan limits and excluded boards are important to check before choosing it.
- 15
Eclipse BaSyx
Free plan Web - 16
Simplicity SDK
Free plan LinuxMacWindows
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price
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