Lean
6.9#1 in formal verification toolsFree planFree planWebLinuxmacOSWindows
VisitLean vs Rocq
What both publish
| Fact | Lean | Rocq |
|---|---|---|
| Founded | 2013 | 1984 |
| License | Lean is released under the Apache 2.0 license, which the documentation describes as allowing others to use and extend the code and mathematical libraries freely. | The Rocq Prover is distributed under the GNU Lesser General Public Licence Version 2.1 (LGPL). |
| Proof checking | Lean's minimal trusted kernel is described as guaranteeing correctness in mathematical proof, software verification, and hardware verification. | Rocq machine-checks proofs using a relatively small certification kernel. |
| Support | The Lean Community Zulip is described as the central hub for questions and collaboration, and Lean FRO hosts weekly technical office hours. | Users can report installation trouble or extension bugs in the dedicated Rocq Zulip stream. |
| Supported systems | Tier 1 platforms include Linux, Apple Silicon macOS, and x86-64 Windows; x86-64 macOS and Emscripten WebAssembly are Tier 2. | The Rocq Platform provides installation support for Windows, macOS, and many Linux distributions. |
| What it does | Lean is an open-source programming language and proof assistant for writing correct, maintainable, formally verified code. | Rocq is an interactive theorem prover for developing mathematical proofs and formal specifications, including proofs that programs meet their specifications. |
Lean plans
- Lean 4Free
Rocq plans
- Rocq ProverFree
Pick Lean if…
Lean suits programmers, theorem provers, and mathematicians working with formalization, proof checking, or software verification. Its general coding capability and browser version may also suit users exploring Lean before choosing a local setup.
Pick Rocq if…
Rocq suits people developing or teaching formal proofs, mathematical specifications, or verified programs. It is aimed at users in mathematics, computer science, and related areas who are comfortable working with a proof assistant.