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Best Why3 Alternatives in 2026

12 platforms from formal verification tools ranked against Why3 on the same published basis.

  1. 1
    Alloy Analyzer Free plan apiLinuxMacWin Free7.3
    Why3 vs Alloy Analyzer
  2. 2
    Z3 Free plan AndroidapiLinuxMacself-hosted Free7.3
    Why3 vs Z3
  3. 3
    PVS Free plan LinuxMacWin Free6.0
    Why3 vs PVS
  4. 4
    Rocq Free plan extensionLinuxMacWebWin Free6.0
    Why3 vs Rocq
  5. 5
    Isabelle Free plan LinuxMacself-hostedWin Free5.9
    Why3 vs Isabelle
  6. 6
    SPIN Free plan LinuxMacWin Free5.9
    Why3 vs SPIN
  7. 7
    UPPAAL Free plan LinuxMacWin Free5.9
    Why3 vs UPPAAL
  8. 8
    ACL2 LinuxMacself-hostedWin 5.6
    Why3 vs ACL2
  9. 9
    Frama-C LinuxMacWin 5.6
    Why3 vs Frama-C
  10. 10
    CPAchecker WinMacLinux 5.2
    Why3 vs CPAchecker
  11. 11
    Viper WinMacLinux 5.2
    Why3 vs Viper
  12. 12
    Apalache 5.1
    Why3 vs Apalache
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