Stainless vs TLA+

Stainless

5.6 #24 in Formal Verification Tools

About Stainless

TLA+

6.5 #17 in Formal Verification Tools

About TLA+
StainlessTLA+
Free planYes
Free trialNoNo
Paid fromFree
PlatformsLinux, macOS, Windowsextension, Linux, macOS, Windows
Free planYes
Verification methoddeductivehybrid
Supported formalismscontractsinvariants
CounterexamplesYesYes
Input languagesScala 3TLA+ and PlusCal
Deploymentself-hostedboth

Listed together in Best Formal Verification Tools