Arm Keil MDK vs PlatformIO Core
Arm Keil MDK
keil.arm.com
PlatformIO Core
docs.platformio.orgSide by side
| Figure | Arm Keil MDK | PlatformIO Core |
|---|---|---|
| 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) | 7.9 (#13) |
| License | MDK components are governed by Arm end-user license agreements rather than an open-source license. | PlatformIO Core is licensed under the permissive Apache 2.0 license for commercial and personal projects. |
| Purpose | Keil MDK simplifies embedded software development for Cortex-M and Ethos-U processors through CLI, IDE, or continuous integration workflows. | PlatformIO Core is the command-line heart of the PlatformIO ecosystem. |
| Support | Keil MDK support offers support cases, a community forum, documentation, and learning videos. | PlatformIO lists premium support, community forums, documentation, bug reporting and a service-status page as support resources. |
| Telemetry | Keil Studio collects usage data according to VS Code telemetry settings, which users can change. | Minimal diagnostics and usage information sharing is enabled by default. |
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.
PlatformIO Core
PlatformIO Core is the command-line component of the PlatformIO ecosystem for embedded development. It includes a multi-platform build system, a unified package manager, library management with a Library Dependency Finder, and a serial port monitor. The platformio.ini file provides declarative configuration for multiple platforms and architectures. Library Manager can use the PlatformIO Registry and Git, Mercurial, and Subversion repositories. The pio ci command is intended for build servers, with documented integrations including AppVeyor, CircleCI, Drone, GitHub Actions, GitLab, Shippable, and Travis CI. PlatformIO Core is written in Python and licensed under Apache 2.0 for personal and commercial projects. Documented host systems include Windows, macOS, Linux, FreeBSD, and Linux ARMv6+. It supports frameworks and SDKs including Arduino, CMSIS, FreeRTOS, Mbed, STM32Cube, and Zephyr, along with target architectures such as AVR, ESP32, RISC-V, and STM32. Installation options include an installer script, Python Package Manager, and Homebrew on macOS. Minimal diagnostics and usage information sharing is enabled by default. The tool is free and open source.