Specifiction
For vendors
AdvertiseTop spots, featured rows, home sponsor Get listedAdd a product we don't cover yet Claim a listingFree: verify the domain, then correct your page Vendor dashboardNumbers, orders and placements
List your tool
Vendor dashboard

Best K Framework Alternatives in 2026

Updated

20 tools from formal verification tools ranked against K Framework on the same published basis.

  1. 1
    Lean Free plan LinuxMacWebWin Free7.5
    K Framework vs Lean
  2. 2
    PVS Free plan LinuxMacWin Free7.5
    K Framework vs PVS
  3. 3
    Rocq Free plan extensionLinuxMacWebWin Free7.5
    K Framework vs Rocq
  4. 4
    Why3 Free plan apiLinuxself-hostedWebWin Free7.4
    K Framework vs Why3
  5. 5
    Z3 Free plan AndroidapiLinuxMacself-hosted Free7.4
    K Framework vs Z3
  6. 6
    HOL4 Free plan LinuxMacself-hostedWin Free7.3
    K Framework vs HOL4
  7. 7
    Alloy Analyzer Free plan apiLinuxMacWin Free7.2
    K Framework vs Alloy Analyzer
  8. 8
    NuSMV Free plan LinuxMacWin Free7.2
    K Framework vs NuSMV
  9. 9
    UPPAAL Free plan LinuxMacWin Free7.2
    K Framework vs UPPAAL
  10. 10
    CBMC Free plan LinuxMacself-hostedWin Free7.1
    K Framework vs CBMC
  11. 11
    CPAchecker Free plan LinuxMacself-hostedWin Free7.1
    K Framework vs CPAchecker
  12. 12
    HOL Light LinuxMacself-hostedWebWin 7.1
    K Framework vs HOL Light
  13. 13
    Isabelle Free plan LinuxMacself-hostedWin Free7.1
    K Framework vs Isabelle
  14. 14
    PRISM Free plan LinuxMacWin Free7.1
    K Framework vs PRISM
  15. 15
    SPIN Free plan LinuxMacWin Free7.1
    K Framework vs SPIN
  16. 16
    ACL2 LinuxMacself-hostedWin 7.0
    K Framework vs ACL2
  17. 17
    OpenJML Free plan apiextensionLinuxMacWin Free7.0
    K Framework vs OpenJML
  18. 18
    TLA+ Free plan extensionLinuxMacWin Free7.0
    K Framework vs TLA+
  19. 19
    Viper extensionLinuxMacWebWin 7.0
    K Framework vs Viper
  20. 20
    Frama-C LinuxMacWin 6.9
    K Framework vs Frama-C

K Framework alternatives compared

#ToolScoreFree planFromRuns on
1Lean7.5Free planFreeLinux, Mac, Web, Windows
2PVS7.5Free planFreeLinux, Mac, Windows
3Rocq7.5Free planFreeBrowser, Linux, Mac, Web, Windows
4Why37.4Free planFreeAPI, Linux, self-hosted, Web, Windows
5Z37.4Free planFreeAndroid, API, Linux, Mac, self-hosted, Web, Windows
6HOL47.3Free planFreeLinux, Mac, self-hosted, Windows
7Alloy Analyzer7.2Free planFreeAPI, Linux, Mac, Windows
8NuSMV7.2Free planFreeLinux, Mac, Windows
9UPPAAL7.2Free planFreeLinux, Mac, Windows
10CBMC7.1Free planFreeLinux, Mac, self-hosted, Windows
11CPAchecker7.1Free planFreeLinux, Mac, self-hosted, Windows
12HOL Light7.1Linux, Mac, self-hosted, Web, Windows
13Isabelle7.1Free planFreeLinux, Mac, self-hosted, Windows
14PRISM7.1Free planFreeLinux, Mac, Windows
15SPIN7.1Free planFreeLinux, Mac, Windows
16ACL27.0Linux, Mac, self-hosted, Windows
17OpenJML7.0Free planFreeAPI, Browser, Linux, Mac, Windows
18TLA+7.0Free planFreeBrowser, Linux, Mac, Windows
19Viper7.0Browser, Linux, Mac, Web, Windows
20Frama-C6.9Linux, Mac, Windows
Make your tool an alternative to K Framework

The sponsored alternative slot on this page is labelled Sponsored.

See the price

Questions about K Framework alternatives

What is the best alternative to K Framework?

Lean, number 1 in formal verification tools with a score of 7.5 out of 10. The others here: PVS, Rocq, Why3 and 16 more.

What is the best free alternative to K Framework?

Lean is the best-ranked alternative with a free plan. 16 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.