Lean
6.9#1 in formal verification toolsFree planFree planWebLinuxmacOSWindows
VisitLean vs Z3
What both publish
| Fact | Lean | Z3 |
|---|---|---|
| Browser use | The learning page links to Lean4Web, described as a web-based version that runs Lean code in a browser. | The project wiki links to a page for trying Z3 in a browser. |
| 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 Z3 is licensed under the MIT license. |
| Platforms | The reference lists Linux, macOS, and Windows among Lean’s supported platforms, with Tier 1 binary releases available through elan. | The project wiki lists Windows, OSX, Linux (Ubuntu and Debian), and FreeBSD as supported platforms. |
| Support | The Lean Community Zulip is described as the central hub for questions and collaboration, and Lean FRO hosts weekly technical office hours. | The project wiki says to contact the creator of an external binding package for support issues. |
Lean plans
- Lean 4Free
Z3 plans
- Z3 (MIT licensed)Free
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 Z3 if…
Z3 suits developers and researchers working on theorem proving, software verification, or analysis who can use its documented formats and interfaces.