Dafny vs TLA+

Dafny

5.6 #20 in Formal Verification Tools

About Dafny

TLA+

6.5 #15 in Formal Verification Tools

About TLA+
DafnyTLA+
Free planYes
Free trialNoNo
Paid fromFree
PlatformsLinux, macOS, self-hosted, Windowsextension, Linux, macOS, Windows
Free planYes
Verification methoddeductivehybrid
Supported formalismscontractsinvariants
CounterexamplesYesYes
Input languagesDafnyTLA+ and PlusCal
Deploymentself-hostedboth

Listed together in Best Formal Verification Tools