UPPAAL
UPPAAL: A focused formal verification tool for timed and real-time system analysis. Ranked #9 of 35 in Formal Verification Tools by our editors (8.6/10); pricing: Free plan · pricing on request; best for timed and real-time system verification.
At a glance
- Editor score8.6 / 10
- PricingFree plan · pricing on request
- Best forTimed and real-time system verification
- Free planYes
- Verification methodModel-checking
- Founded1995
- Facts checked20 Sep 2026
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
Our verdict on UPPAAL
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 language includes clocks, channels, shared variables, and data types, while the graphical system editor and simulator support both graphical symbolic and concrete simulation. UPPAAL runs on Windows, macOS, and Linux and is developed jointly by Uppsala University and Aalborg University.
Licensing is divided between an Academic license and a Commercial license. The Academic license is free for non-commercial applications at qualifying academic institutions. The Commercial license is required for company, private, national research agency, and other non-academic use. The published licensing information directs commercial users to a separate licensing site, so organizations should account for a contact-based purchasing process rather than a self-service subscription. For academic research and teaching that meet the stated conditions, the free plan makes the tool accessible without a paid tier.
UPPAAL’s main strength is the depth of its timed-system verification workflow. It supports symbolic model checking for invariant, reachability, and safety and liveness properties, alongside statistical model checking and timed-game controller synthesis. Diagnostic and counterexample traces can be visualized through the simulator, and verifyta provides command-line verification for workflows that need scripting or automation. This focus makes UPPAAL a strong fit for timing-critical models and formal analysis. Teams seeking timed-automata verification should consider it; teams that need a broader, cloud-hosted platform or methods outside its timed-modeling focus may prefer another tool.
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UPPAAL pricing
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UPPAAL fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Verification method | Model-checking |
| Supported formalisms | Invariants |
| Counterexamples | Yes |
| Proof artifacts | Not verified |
| Input languages | UPPAAL timed-automata modeling language |
| Deployment | Self-hosted |
| Deployment | Self-hosted, Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan · pricing on request (source) |
| Website | uppaal.org |
| Facts checked | 20 Sep 2026 |
Alternatives to UPPAAL
- IsabelleA free, open-source proof assistant for broad mathematical and systems verification.9.4
- RocqA free, kernel-checked theorem prover with dependent types, automation, and certified extraction.9.3
- PVSA broad, self-hosted environment for hybrid formal verification workflows.9.2
UPPAAL vs the competition
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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