Frama-C

Frama-C is ranked #5 of 33 in formal verification tools on Freedom251. It runs on Linux, macOS, Windows.

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Frama-C

Purpose: Frama-C combines program analysis plug-ins to help guarantee the absence of bugs in C programs.
Formal methods: The site says most Frama-C analyzers use formal methods and are sound, meaning they do not stay silent when a bug might happen.
ACSL: Frama-C uses ACSL annotations to specify function contracts and verify conformance to functional specifications.
Eva analysis: Eva uses abstract interpretation to analyze C programs and report possible runtime errors within the undefined behaviors supported by its analysis.
Eva limits: Eva currently does not support recursive calls and analyzes only sequential code.
WP proofs: WP checks whether ACSL contracts hold for all possible executions using weakest-precondition calculus and external provers or proof assistants.
WP integrations: WP recommends Alt-Ergo, Coq, Z3, and CVC4, and supports other provers available through Why3.
Runtime checking: E-ACSL translates executable ACSL annotations into C code for runtime checking, but not all ACSL constructs can be translated.
Plugin ecosystem: The plugin catalog lists Eva, WP, E-ACSL, and other analyzers in the main distribution, alongside separately distributed and proprietary plugins.
Platforms: The download page provides installation packages for Linux and macOS and documents installation on Windows through WSL and opam.
Licensing: Frama-C is available under LGPL and can be dual-licensed for other uses.
Support: The team offers technical support, training, tutorials, hackathons, extensions, and customization; community support is available through GitLab issues, Stack Overflow, and a mailing list.
Intended users: The site describes Frama-C as used in teaching, experimental research, and industrial applications, including certification work for DO-178, IEC 60880, and Common Criteria EAL 6–7.
Maker: The platform is co-developed at CEA LIST and the Inria Saclay–Île-de-France Toccata team, in common with LRI-CNRS and Université Paris-Sud 11.

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Where it ranks on Freedom251

Best Formal Verification Tools in 2026#5 of 33
Best C and C++ Static Analysis Tools in 2026#8 of 24

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Sources

frama-c.com· checked 3 Oct 2026
frama-c.com/fc-plugins/eva.html· checked 3 Oct 2026
frama-c.com/fc-plugins/wp.html· checked 3 Oct 2026
frama-c.com/html/kernel-plugin.html· checked 3 Oct 2026
frama-c.com/html/get-frama-c.html· checked 3 Oct 2026
frama-c.com/html/contact.html· checked 3 Oct 2026
frama-c.com/html/authors.html· checked 3 Oct 2026
frama-c.com/html/kernel.html· checked 4 Oct 2026
frama-c.com/html/contact.html· checked 4 Oct 2026