Arm Keil MDK vs ESP-IDF Extension for VS Code
Arm Keil MDK
keil.arm.com
ESP-IDF Extension for VS Code
docs.espressif.comSide by side
| Figure | Arm Keil MDK | ESP-IDF Extension for VS Code |
|---|---|---|
| Price from | $99/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | — |
| Plans published | 8 | 1 |
| Spec score · Embedded Systems Toolchains | 9.5 (#1) | 8.2 (#7) |
| Spec score · Embedded Development IDEs | 9.5 (#1) | 8.1 (#5) |
| Spec score · IoT Development Tools | 9.4 (#1) | 8.0 (#4) |
| Debugging | The VS Code integration supports pyOCD with ST-Link, CMSIS-DAP and ULINK, plus J-Link Server. | It supports device debugging and postmortem debugging with a core dump or GDB stub. |
| License | MDK components are governed by Arm end-user license agreements rather than an open-source license. | The marketplace listing says the extension is licensed under Apache License 2.0. |
| Purpose | Keil MDK simplifies embedded software development for Cortex-M and Ethos-U processors through CLI, IDE, or continuous integration workflows. | The extension lets developers develop, build, flash, monitor, debug, and manage ESP-IDF projects targeting Espressif chips within Visual Studio Code. |
| Support | Keil MDK support offers support cases, a community forum, documentation, and learning videos. | For help, the documentation directs users to the EIM GitHub repository or the extension’s GitHub repository. |
Plans
Arm Keil MDK
- EssentialPriced on request
- ProfessionalPriced on request
- ProfessionalPriced on request
- CommunityFree
- Keil MDK v6 Essential82.39 CHF a month
- Keil MDK v6 Essential$99 a month
- Keil MDK v6 Professional165.60 CHF a month
- Keil MDK v6 Professional$199 a month
In their own words
Arm Keil MDK
Arm Keil MDK is a toolchain for embedded software targeting Cortex-M and Ethos-U processors. MDK v6 supports command-line, IDE, and continuous-integration workflows across major operating systems. It includes Keil Studio extensions for Visual Studio Code, Keil μVision, Arm Compiler for Embedded, and Arm Fixed Virtual Platform models. Software packs add device and board support, middleware, components, code templates, and example projects independently of the toolchain. Keil Studio supports CMSIS workflows with an integrated debugger and extensions for creating, building, and testing embedded applications. Listed integrations include CMSIS-FreeRTOS, Keil RTX5, MDK-Middleware, IoT clients, CMSIS-DAP, ULink, and third-party debug adapters. Community is for non-commercial use. The listed MDK v6 Essential plan costs $99 a month per license; Professional costs $199 a month per license and adds Arm Virtual Hardware, functional-safety compiler tools, and legacy tools including Arm Compiler 5. Keil μVision is available only for Windows hosts.
ESP-IDF Extension for VS Code
ESP-IDF Extension for VS Code lets developers create, build, flash, monitor, debug, and manage projects for Espressif chips inside Visual Studio Code. Its project wizard starts from ESP-IDF examples or configured framework templates. Builds use CMake and Ninja, and devices can be flashed over UART, DFU, or JTAG. Debugging includes device sessions and postmortem work with a core dump or GDB stub. Additional tools include code coverage, heap tracing, application-level tracing, binary size analysis, and an eFuse viewer. The extension can install ESP components and add Arduino as an ESP-IDF component; QEMU can emulate debugging and monitor output. Documented development environments include Docker, WSL, SSH, Dev Containers, Codespaces, and browser-based VS Code. The extension also exposes ESP-IDF commands to language-model integrations such as Copilot through MCP servers. It is free and open source under Apache License 2.0, for Windows, macOS, and Linux. Visual Studio Code is required.