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Best Dafny Alternatives in 2026

12 apps from formal verification tools ranked against Dafny on the same published basis.

  1. 1
    Z3 Free plan AndroidapiLinuxMacself-hosted Free7.8
    Dafny vs Z3
  2. 2
    ACL2 LinuxMacself-hostedWin 6.4
    Dafny vs ACL2
  3. 3
    PVS Free plan LinuxMacWin Free6.4
    Dafny vs PVS
  4. 4
    Rocq Free plan extensionLinuxMacWebWin Free6.4
    Dafny vs Rocq
  5. 5
    Isabelle Free plan LinuxMacself-hostedWin Free6.3
    Dafny vs Isabelle
  6. 6
    SPIN Free plan LinuxMacWin Free6.3
    Dafny vs SPIN
  7. 7
    UPPAAL Free plan LinuxMacWin Free6.3
    Dafny vs UPPAAL
  8. 8
    Frama-C LinuxMacWin 6.2
    Dafny vs Frama-C
  9. 9
    Alloy Analyzer Free plan apiLinuxMacWin Free5.9
    Dafny vs Alloy Analyzer
  10. 10
    CBMC WinMacLinux 5.9
    Dafny vs CBMC
  11. 12
    HOL4 WinLinux 5.9
    Dafny vs HOL4
  12. 13
    K Framework LinuxMac 5.9
    Dafny vs K Framework
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