Cosmic Ray vs Gambit
Cosmic Ray
cosmic-ray.readthedocs.ioGambit
certora.comSide by side
| Figure | Cosmic Ray | Gambit |
|---|---|---|
| Price from | — | — |
| Free plan | — | — |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 0 | 0 |
| Spec score · Mutation Testing Tools | 7.5 (#13) | 7.8 (#8) |
| Intended users | The documentation presents Cosmic Ray for Python projects whose teams want to check whether their test suites meaningfully verify code behavior. | The maker describes Gambit as usable on any Solidity project. |
| License | The project repository identifies the software as MIT licensed. | The Gambit GitHub repository identifies its license as MIT. |
| Maker | The project documentation credits Sixty North AS. | Gambit is built and maintained as an open-source project by the Certora team. |
| Purpose | Cosmic Ray is a mutation testing tool for Python 3 that makes small changes to production code and runs the test suite against each change. | Gambit is an open source Solidity mutation testing tool that evaluates and strengthens a testing suite. |
In their own words
Cosmic Ray
Cosmic Ray has no write-up on Specifiction yet; its figures are above.
Gambit
Gambit is a free, open-source mutation testing tool for Solidity projects. It generates altered contract versions, called mutants, to measure whether a test suite or formal verification specification detects faults. Gambit locates mutation points by traversing a program’s abstract syntax tree and applying predefined syntax transformations. A declarative configuration language lets users tailor mutations to specific parts of a program. Results can be viewed in a dashboard that summarizes mutant verification and calculates a specification score. Gambit can work with the Certora Prover to evaluate formal specifications; that workflow generates mutants and submits a verification job for each to Certora’s server. The command line includes `mutate` for generating mutants and `summary` for presenting them. A compatible `solc` binary is required for the project being mutated. Gambit supports Solidity and is listed for Linux, macOS, and Windows, though prebuilt binaries are available for Linux x86-64 and Mac; Windows and Linux ARM users must build from source. Function-call and swap-arguments-function mutation operators are disabled. The repository identifies the license as MIT. Certora directs product questions to its Help Desk channel on Discord.