Best HOL Light Alternatives in 2026
Updated
20 apps from formal verification tools ranked against HOL Light on the same published basis.
- 1HOL Light vs Z3
- 2HOL Light vs Rocq
- 3HOL Light vs Isabelle
- 4HOL Light vs PVS
- 5HOL Light vs ACL2
- 6HOL Light vs Frama-C
- 7HOL Light vs CBMC
- 8HOL Light vs SPIN
- 9HOL Light vs Lean
- 10HOL Light vs Why3
- 11HOL Light vs UPPAAL
- 12HOL Light vs TLA+
- 13HOL Light vs Alloy Analyzer
- 14HOL Light vs K Framework
- 15HOL Light vs Dafny
- 16HOL Light vs cvc5
- 17HOL Light vs CPAchecker
- 18HOL Light vs F*
- 19HOL Light vs PRISM
- 20HOL Light vs NuSMV
HOL Light alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Z3 | 8.9 | Free plan | Free | Android, API, Linux, Mac, self-hosted, Web, Windows |
| 2 | Rocq | 8.2 | Free plan | Free | Browser, Linux, Mac, Web, Windows |
| 3 | Isabelle | 8.1 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 4 | PVS | 8.1 | Free plan | Free | Linux, Mac, Windows |
| 5 | ACL2 | 7.4 | No | — | Linux, Mac, self-hosted, Windows |
| 6 | Frama-C | 7.2 | No | — | Linux, Mac, Windows |
| 7 | CBMC | 7.1 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 8 | SPIN | 7.0 | Free plan | Free | Linux, Mac, Windows |
| 9 | Lean | 6.9 | No | — | Web, Windows, Mac, Linux |
| 10 | Why3 | 6.8 | No | — | Web, Linux, Windows |
| 11 | UPPAAL | 6.8 | Free plan | Free | Linux, Mac, Windows |
| 12 | TLA+ | 6.7 | No | — | Windows, Mac, Linux |
| 13 | Alloy Analyzer | 6.7 | Free plan | Free | API, Linux, Mac, Windows |
| 14 | K Framework | 6.6 | No | — | Linux, Mac |
| 15 | Dafny | 6.5 | No | — | Windows, Mac, Linux |
| 16 | cvc5 | 6.3 | No | — | Web, Windows, Mac, Linux |
| 17 | CPAchecker | 6.3 | No | — | Windows, Mac, Linux |
| 18 | F* | 6.2 | No | — | Windows, Linux, Mac |
| 19 | PRISM | 6.0 | No | — | Windows, Mac, Linux |
| 20 | NuSMV | 5.9 | No | — | Windows, Mac, Linux |
Make your app an alternative to HOL Light
See the priceThe sponsored alternative slot on this page is labelled and never changes the order above.
Questions about HOL Light alternatives
What is the best alternative to HOL Light?
Z3, number 1 in formal verification tools with a score of 8.9 out of 10. The others here: Rocq, Isabelle, PVS and 16 more.
What is the best free alternative to HOL Light?
Z3 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 mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.