Lean vs UPPAAL

Lean9.1Visit UPPAAL8.6Visit

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

vs

UPPAAL #9 in Formal Verification Tools 8.6/10 Free plan · pricing on request Free plan✓ 1 of 2 features Visit UPPAAL

• Lean fits best

  Modern dependent-type verification

• UPPAAL fits best

  Timed and real-time system verification

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Side by side

Feature	Lean 9.1/10 Visit ↗	UPPAAL 8.6/10 Visit ↗
At a glance
Editor score	9.1	8.6
Ranking	#5 in Formal Verification Tools	#9 in Formal Verification Tools
Best for	Modern dependent-type verification	Timed and real-time system verification
Pricing model	Free	Free plan + paid
Starting price	Open source	—
Free plan	Not checked yet	✓ (best)
Free trial	—	—
Deployment	Cloud, Self-hosted	Self-hosted, Desktop
Platforms	Web, Windows, macOS, Linux	Windows, macOS, Linux
Support	Community, Docs	Community, Docs
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features Lean 1/2 · UPPAAL 1/2
Counterexamples	Not checked yet	✓ (best)
Proof artifacts	✓ (best)	Not checked yet
Specs
Verification method	Deductive	Model-checking
Supported formalisms	Theorem-proving	Invariants
Input languages	Lean 4	UPPAAL timed-automata modeling language
Deployment	Both	Self-hosted
Our review
Pros	Kernel-based checking produces independently checkable proof terms. Tactics and metaprogramming support extensible proof automation. Works across web, desktop, Linux, and self-hosted environments.	Timed-automata modeling with clocks, channels, and shared variables Symbolic, statistical, and safety and liveness model checking Diagnostic traces, controller synthesis, and command-line verification
Cons	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.	Commercial licensing requires contacting the licensing site Self-hosted desktop deployment requires local installation Focused on timed-automata models rather than broad formal methods
Our verdict	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 →	UPPAAL is a desktop tool for modeling, simulating, and verifying real-time systems represented as networks of timed automata. It is designed for researchers, students, and engineering teams working on timing-critical systems. Its modeling… Read the review →

Strengths and trade-offs

• 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.

• UPPAAL — where it wins

  • Timed-automata modeling with clocks, channels, and shared variables
  • Symbolic, statistical, and safety and liveness model checking
  • Diagnostic traces, controller synthesis, and command-line verification

  Where it doesn't

  • Commercial licensing requires contacting the licensing site
  • Self-hosted desktop deployment requires local installation
  • Focused on timed-automata models rather than broad formal methods

• Lean9.1/10 · Open source

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

  Visit LeanFull verdict →
• UPPAAL8.6/10 · Free plan · pricing on request

  A focused formal verification tool for timed and real-time system analysis.

  Visit UPPAALFull verdict →