Rocq vs Lean

Rocq9.3Visit Lean9.1Visit

Higher score Rocq #3 in Formal Verification Tools 9.3/10 Free plan Free plan✓ 1 of 2 features Visit Rocq

vs

Lean #5 in Formal Verification Tools 9.1/10 Open source ✓ 1 of 2 features Visit Lean

• Rocq fits best

  Certified theorem proving with strong tooling

• Lean fits best

  Modern dependent-type verification

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature	Rocq 9.3/10 Visit ↗	Lean 9.1/10 Visit ↗
At a glance
Editor score	9.3	9.1
Ranking	#3 in Formal Verification Tools	#5 in Formal Verification Tools
Best for	Certified theorem proving with strong tooling	Modern dependent-type verification
Pricing model	Free	Free
Starting price	Free plan	Open source
Free plan	✓ (best)	Not checked yet
Free trial	—	—
Deployment	Self-hosted, Desktop	Cloud, Self-hosted
Platforms	Windows, macOS, Linux	Web, Windows, macOS, Linux
Support	Community, Docs	Community, Docs
Integrations	6 integrations	1 integrations
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features Rocq 1/2 · Lean 1/2
Counterexamples	Not checked yet	Not checked yet
Proof artifacts	✓	✓
Specs
Verification method	Deductive	Deductive
Supported formalisms	Theorem-proving	Theorem-proving
Input languages	Gallina and Rocq vernacular	Lean 4
Deployment	Self-hosted	Both
Our review
Pros	Kernel machine-checks proof terms through a small certification kernel Extracts certified programs to OCaml, Haskell, and Scheme Supports RocqIDE, major editors, Docker, and opam	Kernel-based checking produces independently checkable proof terms. Tactics and metaprogramming support extensible proof automation. Works across web, desktop, Linux, and self-hosted environments.
Cons	Focused on theorem proving rather than broader verification formalisms Self-hosted deployment requires managing the local environment No commercial pricing tiers or vendor-hosted plan options	Its formalism focus is theorem-proving rather than a broad multi-formalism toolkit. The listed editor integration is centered on Visual Studio Code. Lean 4 is the listed input language for formalization workflows.
Our verdict	Rocq is an open-source interactive theorem prover and dependently typed programming language for mathematical formalisation, education, research, and verified software development. It lets users define programs, predicates, mathematical… Read the review →	Lean combines interactive theorem proving with a dependently typed functional programming language. It is intended for formalizing mathematics, verifying software and hardware, and developing reliable programs. The open-source distribution… Read the review →

Strengths and trade-offs

• Rocq — where it wins

  • Kernel machine-checks proof terms through a small certification kernel
  • Extracts certified programs to OCaml, Haskell, and Scheme
  • Supports RocqIDE, major editors, Docker, and opam

  Where it doesn't

  • Focused on theorem proving rather than broader verification formalisms
  • Self-hosted deployment requires managing the local environment
  • No commercial pricing tiers or vendor-hosted plan options

• Lean — where it wins

  • Kernel-based checking produces independently checkable proof terms.
  • Tactics and metaprogramming support extensible proof automation.
  • Works across web, desktop, Linux, and self-hosted environments.

  Where it doesn't

  • Its formalism focus is theorem-proving rather than a broad multi-formalism toolkit.
  • The listed editor integration is centered on Visual Studio Code.
  • Lean 4 is the listed input language for formalization workflows.

• Rocq9.3/10 · Free plan

  A free, kernel-checked theorem prover with dependent types, automation, and certified extraction.

  Visit RocqFull verdict →
• Lean9.1/10 · Open source

  A kernel-checked Lean 4 environment for formal mathematics and verified programs.

  Visit LeanFull verdict →