TLA+
6.0#22 in formal verification toolsFree planFree planExtensionLinuxmacOSWindows
VisitTLA+ vs Why3
What both publish
| Fact | TLA+ | Why3 |
|---|---|---|
| License | The TLA+ tools and Toolbox repository is licensed under the MIT License. | TryWhy3 is distributed under the GNU Lesser General Public License version 2.1 with a special linking exception. |
| Purpose | TLA+ is a high-level language for modeling software and hardware systems, especially concurrent and distributed systems. | Why3 is a platform for deductive program verification that uses WhyML and external theorem provers to discharge verification conditions. |
| Support | The TLA+ Foundation directs technical questions and issues to the appropriate GitHub issue tracker. | The project provides a user mailing list, a Zulip chat, and a bug tracking system. |
TLA+ plans
- TLA+Free
Why3 plans
- Why3Free
Pick TLA+ if…
TLA+ suits teams modeling concurrent or distributed systems and checking designs before implementation. It offers both model-checking and proof-checking workflows, with interfaces for the Toolbox, VS Code, and command line.
Pick Why3 if…
Why3 suits developers and researchers working on deductive verification with contracts and WhyML. It may also fit users who need to connect external provers or use its OCaml API.