Side by side
Dafny vs K Framework
Both stand on formal verification tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacSelf-hosted+1
Dafny combines a programming language with specification and deductive verification tools. Users should account for Z3 and any additional tools needed for their compilation targets.
Visit Dafny Free plan APILinuxMac+1
K provides a specification-driven route to executable language tools and formal analysis. Its command-line workflow and platform, dependency, and documentation constraints should be considered before adoption.
Visit K FrameworkThe facts
| Dafny | K Framework | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Mac, Self-hosted, Windows | API, Linux, Mac, Self-hosted |
| Lowest paid plan | Not published | Not published |
| Plans published | None | None |
| Maker | Not published | Not published |
| Website | dafny.org | kframework.org |
| On formal verification tools | #14 of 34 | #18 of 34 |
Dafny: what it does well
- Static verification checks code against written specifications.
- Proof tools include contracts, invariants and termination conditions.
- Compiles to five listed target languages.
- Free under the MIT License.
What to know first
- Verification requires the Z3 tool.
- Generated programs may require target-specific tools.
- The tool is a .NET 8.0 artifact.
K Framework: what it does well
- Free and self-hosted
- Derives tools from one specification
- Concrete and symbolic execution
- Theorem-proving analysis
- Python scripting interface
What to know first
- Native Windows unsupported
- Requires Z3 4.8.15
- GUI tools are not provided
- Documentation is still under construction
Alternatives to Dafny Alternatives to K Framework The whole list