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Isabelle vs Rocq Prover: catalog facts
Isabelle	Rocq Prover
Best for: Researchers and students working on formal mathematical proofs and verification	Best for: Researchers and students writing formally verified proofs and programs
Free Free to download for Linux, Windows and macOS.	Free Free and open source.
Windows, macOS, Linux	Windows, Command line
Long-established proof assistant with regular releases Bundled jEdit-based IDE with dark mode and screen reader support All 3 strengths for Isabelle Long-established proof assistant with regular releases Bundled jEdit-based IDE with dark mode and screen reader support Builds for Linux on Intel and ARM, Windows and macOS	Machine-checked proofs for mathematics and software Extracts executable OCaml or Haskell code from specifications All 4 strengths for Rocq Prover Machine-checked proofs for mathematics and software Extracts executable OCaml or Haskell code from specifications Rocq Platform bundles the prover with common libraries Actively released, with version 9.2.0 current
Large projects need a lot of memory, up to 64 GB Steep learning curve for those new to formal proof	Steep learning curve for newcomers to formal proof Name change from Coq means older material uses the old name
Downloadable app	Downloadable app
Not open source	Open source
License not stated	License: LGPL-2.1
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for Isabelle cl.cam.ac.uk/research/hvg/Isabelle Catalog checked October 2, 2026	Official website Full listing and sources Sources for Rocq Prover rocq-prover.org Catalog checked October 2, 2026

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