Lean
6.9#1 in formal verification toolsFree planFree planWebLinuxmacOSWindows
VisitLean vs Stainless
What both publish
| Fact | Lean | Stainless |
|---|---|---|
| Editor integration | The recommended setup uses VS Code and the official Lean 4 extension, which provides syntax highlighting and code completion. | The project page links installation instructions for standalone use, Docker, sbt, and Metals. |
| 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 repository states that Stainless is released under the Apache 2.0 license. |
| Who it is for | The Learn page recommends separate core resources for programmers, theorem provers, and mathematicians learning formalization. | The documentation describes Stainless as a tool to help developers build verified Scala software. |
Lean plans
- Lean 4Free
Stainless plans
No prices published.
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 Stainless if…
You want what its maker publishes above — check its page for the details.