CLion

CLion is a cross-platform IDE for C and C++ development, best suited to developers who want editing, build, debugging and testing tools together. Its breadth is a strong fit for complex native and embedded workflows, but commercial development requires a paid subscription.

Overview

CLion combines code editing and analysis with project building, debugging, testing and version control. Its support for several build systems and toolchains makes it adaptable across C and C++ projects; that range will matter most to developers working across different project setups rather than those seeking only a lightweight editor.

The IDE also handles CMake, Python, JavaScript, XML, HTML and Markdown, with additional languages available through plugins. JetBrains is headquartered in Amsterdam and was founded in 2000. Its Trust Center covers security practices, compliance certifications and data protection, including SOC 2 Type II and GDPR compliance.

Key features

Editing, analysis and navigation

Context-aware completion, code analysis, navigation and automated refactorings bring common development work into the editor. Analysis includes data flow analysis, Clangd-based checks and Clang-Tidy; Google Sanitizers and Valgrind integrations add runtime error detection. This is a substantial toolkit for developers who want to catch issues during development, though its breadth may be more than a small project needs.

Builds, debugging and tests

CLion supports CMake, Makefile, Bazel, Meson and compilation database projects. Its built-in debugger supports GDB and LLDB, with variable inspection, memory and disassembly views, and core dump debugging. The detail is useful when diagnosing difficult failures, not just stepping through routine code.

Testing support covers Google Test, Boost.Test, Doctest and Catch, with a built-in test runner. A unified version-control interface supports Subversion, Git, GitHub, Mercurial, CVS and Perforce.

Remote and embedded work

Remote workflows include a thin IDE client, full remote mode, Docker containers, WSL toolchains and remote debugging. Embedded support spans GCC ARM, IAR and custom toolchains, on-chip debugging, PlatformIO, STM32CubeMX, Zephyr and FreeRTOS. This makes CLion a compelling choice for developers moving between local, remote and embedded environments.

Pricing

CLion is freemium, but its free offer is limited to non-commercial use. CLion Non-Commercial costs nothing and covers individual learning, self-education, open-source contributions without commercial benefits, content creation and hobby development. Support is through public forums and a bug tracker. It is not an option for commercial development.

CLion Commercial — Individual costs $10.90 a month, billed monthly, and covers commercial development. It includes a free 30-day trial and adds private-ticket support alongside public forums and the bug tracker. The monthly subscription avoids a stated long-term billing commitment, while the non-commercial plan is the clear choice only when the work remains within its permitted uses.

Platforms

CLion supports Linux, macOS and Windows. The installation guide lists Windows 10 or 11, macOS 15 or 26, and specified Linux distributions as supported operating systems.

Who it's for

Choose CLion if you develop C or C++ and need one IDE for multiple build systems, robust debugging, integrated testing, or remote and embedded workflows. Its free plan suits learners, hobbyists and qualifying non-commercial contributors. Developers doing commercial work should budget for the individual subscription; those who only need a free IDE or a narrower embedded tool may prefer a free alternative.

Pros and cons

Pros

• Broad build-system support: CMake, Makefile, Bazel, Meson and compilation databases cover varied project setups.
• Detailed debugging and analysis: GDB and LLDB, memory and disassembly views, core dump debugging, static checks and runtime-analysis integrations support deeper diagnosis.
• Remote and embedded coverage: Remote modes, containers, WSL and a range of embedded toolchains and platforms make it useful beyond local desktop development.
• Useful non-commercial offer: Qualifying personal, learning and open-source work can use CLion at no cost.

Cons

• Commercial use is paid: The free plan does not cover commercial development.
• Monthly individual cost: Commercial developers pay $10.90 a month after the 30-day trial.
• Platform constraints: CLion supports Linux, macOS and Windows, not the broader set of platforms offered by some alternatives.

Alternatives

Qt Creator is another freemium option with a free open-source version; choose it if that model suits your work, while noting that Qt framework use is subject to LGPL/GPL obligations. Visual Studio is worth considering for Windows users who want its Community plan, which is described as a fully featured IDE for students, open-source and individual developers; its Professional monthly plan costs $45 a month.

PlatformIO IDE offers a free Community plan with access to forums and documentation, making it an option to compare for a free development environment. For free IDEs with no paid tiers stated, consider KDevelop or Code::Blocks. CodeLite is a free GPLv2 IDE with a plugin exception allowing separately developed plugins to use any license.

For a free tool focused on STM32, STM32CubeIDE is free to download and use, though it is a proprietary ST application. MPLAB X IDE is another free IDE option.

Browse more options in C++ IDEs, Integrated Development Environments and IDE Software.

Verdict

CLion is the right choice for C and C++ developers who value a single, capable environment for varied build systems, debugging, tests and remote or embedded work. Its main reason to choose is that breadth; its main reason to look elsewhere is the paid subscription required for commercial development.