F*
6.0#18 in formal verification toolsFree planFree planLinuxmacOSSelf-hostedWindows
VisitF* vs Lean
What both publish
| Fact | F* | Lean |
|---|---|---|
| License | F* is distributed under the Apache 2.0 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. |
F* plans
- F*Free
Lean plans
- Lean 4Free
Pick F* if…
F* suits programmers working with functional or effectful code who need proof-oriented development. Its learning resources and installation options are listed for several operating systems and environments.
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.