Lean
6.9#1 in formal verification toolsFree planFree planWebLinuxmacOSWindows
VisitLean vs PVS
What both publish
| Fact | Lean | PVS |
|---|---|---|
| Founded | 2013 | 1946 |
| Platforms | The reference lists Linux, macOS, and Windows among Lean’s supported platforms, with Tier 1 binary releases available through elan. | Current listed releases target 64-bit Linux and macOS; the site says Windows can run PVS 7.1 or later through Vagrant and VirtualBox. |
| Support | The Lean Community Zulip is described as the central hub for questions and collaboration, and Lean FRO hosts weekly technical office hours. | Support is offered through developer and bug-report email addresses, GitHub issues, Google Groups, and moderated mailing lists. |
Lean plans
- Lean 4Free
PVS plans
- PVS (noncommercial)Free
- PVS (commercial)Priced on request
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 PVS if…
PVS may suit people formalizing mathematics or verifying hardware and algorithms, as well as teams using formal methods in computer algebra or code-verification systems. Commercial users should review the separate runtime licensing requirement.