contract
The premium Open Source alternative to Microsoft GSL
🎯 Best for:Developers building mission-critical C++ applications requiring high reliability
What is contract?
A library implementing formal software contracts including preconditions, postconditions, and invariants for C++. It enforces interface specifications at runtime to ensure code correctness and facilitate automated testing.
Tech Stack
C++Testing & QA
Why contract?
- • Formalizes API behavior
- • Zero-cost abstractions
- • Improves debuggability
Limitations
- • Learning curve for DbC
- • Compile-time impact
- • C++ specific
2/6/2026
Last Update
29
Forks
7
Issues
BSL-1.0
License
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Competitor Cost
-$1,440
/ year (est. based on Microsoft GSL)
Self-Hosted
$0
/ year
Team Size10 Users
150+
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