Lean
6.9#1 in formal verification toolsFree planFree planWebLinuxmacOSWindows
VisitLean vs OpenJML
What both publish
| Fact | Lean | OpenJML |
|---|---|---|
| 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 OpenJML User Guide states that the command-line tool is licensed under GPL version 2. |
Lean plans
- Lean 4Free
OpenJML plans
- OpenJMLFree
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 OpenJML if…
OpenJML suits Java developers who annotate programs with JML and want static verification or runtime assertion checking. It is aimed at users comfortable with a self-hosted command-line tool and its installation requirements.