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Comp Cert
Compile C with CompCert, a formally verified compiler targeting ARM, PowerPC, RISC-V, and x86 processors.
About Comp Cert
CompCert is a compiler for the core C language that generates code for ARM, PowerPC, RISC-V, and x86 processors. Its distinguishing feature is that it was formally verified using the Coq proof assistant. The project describes the generated assembly code as formally guaranteed to behave as the semantics of the source C code prescribe. This is the GitHub repository for the project, which is maintained by INRIA and AbsInt.
CompCert is not free software. This release is non-commercial and can be used only for evaluation, research, educational, and personal purposes. AbsInt sells a commercial version without this restriction, which includes professional support and extra features. The project's LICENSE file has more detail.
Key features
- Compiles the core C language to assembly code for four processor families
- Generates code for ARM, PowerPC, RISC-V, and x86 processors
- Formally verified using the Coq proof assistant
- Project describes generated assembly as formally guaranteed to follow C source semantics
- Non-commercial release limited to evaluation, research, educational, and personal use
Best for: Researchers, educators, and individuals who want to evaluate or use a formally verified C compiler for non-commercial purposes.
Good for
- Formally verified with the Coq proof assistant
- Targets ARM, PowerPC, RISC-V, and x86 processors
Watch out for
- Not free software
- The non-commercial release cannot be used for commercial purposes
- Supports the core C language only
Comp Cert at a glance
- Website
- github.com/AbsInt/CompCert
- Category
- Development › Programming Languages
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Comp Cert FAQ
Can CompCert be used commercially?
The non-commercial release can only be used for evaluation, research, educational, and personal purposes. A commercial version without this restriction, with professional support and extra features, can be purchased from AbsInt. Commercial inquiries go to [email protected].
Where are general discussions about CompCert held?
General discussions take place on the [email protected] mailing list.
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