Freedom report

One barScore 5.4

  • Free tierNo free tier on record
  • Open codeNo open-source code on record
  • Runs widely3 of 6 device platforms
  • DocumentedThinly documented

Viper is ranked #19 of 33 in formal verification tools on Freedom251. It runs on Windows, macOS, Linux.

Compared on formal verification tools

Free plan
Yes
Verification method
hybrid
Supported formalisms
contracts
Counterexamples
Yes
Input languages
Viper language; Go, Python, and Rust via front-end tools
Deployment
self-hosted

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