Best OpenJML Alternatives in 2026
Updated
20 apps from formal verification tools ranked against OpenJML on the same published basis.
- 1OpenJML vs Rocq
- 2OpenJML vs Z3
- 3OpenJML vs PVS
- 4OpenJML vs Alloy Analyzer
- 5OpenJML vs CBMC
- 6OpenJML vs Isabelle
- 7OpenJML vs SPIN
- 8OpenJML vs UPPAAL
- 9OpenJML vs ACL2
- 10OpenJML vs Dafny
- 11OpenJML vs Frama-C
- 12OpenJML vs CPAchecker
- 13OpenJML vs cvc5
- 14OpenJML vs HOL Light
- 15OpenJML vs Lean
- 16OpenJML vs NuSMV
- 17OpenJML vs PRISM
- 18OpenJML vs Stainless
- 19OpenJML vs Viper
- 20OpenJML vs Agda
OpenJML alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Rocq | 6.7 | Free plan | Free | Browser, Linux, Mac, Web, Windows |
| 2 | Z3 | 6.7 | Free plan | Free | Android, API, Linux, Mac, self-hosted, Web, Windows |
| 3 | PVS | 6.6 | Free plan | Free | Linux, Mac, Windows |
| 4 | Alloy Analyzer | 6.5 | Free plan | Free | API, Linux, Mac, Windows |
| 5 | CBMC | 6.5 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 6 | Isabelle | 6.5 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 7 | SPIN | 6.5 | Free plan | Free | Linux, Mac, Windows |
| 8 | UPPAAL | 6.5 | Free plan | Free | Linux, Mac, Windows |
| 9 | ACL2 | 5.6 | No | — | Linux, Mac, self-hosted, Windows |
| 10 | Dafny | 5.6 | No | — | Linux, Mac, self-hosted, Windows |
| 11 | Frama-C | 5.6 | No | — | Linux, Mac, Windows |
| 12 | CPAchecker | 5.4 | No | — | Windows, Mac, Linux |
| 13 | cvc5 | 5.4 | No | — | Web, Windows, Mac, Linux |
| 14 | HOL Light | 5.4 | No | — | Web, Windows, Mac, Linux |
| 15 | Lean | 5.4 | No | — | Web, Windows, Mac, Linux |
| 16 | NuSMV | 5.4 | No | — | Windows, Mac, Linux |
| 17 | PRISM | 5.4 | No | — | Windows, Mac, Linux |
| 18 | Stainless | 5.4 | No | — | Windows, Mac, Linux |
| 19 | Viper | 5.4 | No | — | Windows, Mac, Linux |
| 20 | Agda | 5.3 | No | — | Windows, Mac, Linux |
Make your app an alternative to OpenJML
See the priceThe sponsored alternative slot on this page is labelled Sponsored.
Questions about OpenJML alternatives
What is the best alternative to OpenJML?
Rocq, number 1 in formal verification tools with a score of 6.7 out of 10. The others here: Z3, PVS, Alloy Analyzer and 16 more.
What is the best free alternative to OpenJML?
Rocq is the best-ranked alternative with a free plan. 8 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.