Runtime Verification

Our work

Assurance work by formal methods experts

A Runtime Verification engagement is not a checkmark. Whether it is a full audit, a formal proof, a fuzzing campaign, or a design review, it is an uncompromising end-to-end examination, and a mark of a security conscious team.

9
Years of expertise
$100B+
Total Value Secured
100+
Clients Protected
22
Security Experts

How we work with teams

We scope the mix with you, based on what the system is and what failure would cost.

What every engagement includes

The most complete security work in the industry.

  • Invariant-First Analysis

    Before touching the code, we define the invariants: the properties that must always hold. This ensures we know exactly what correct behavior looks like from the start.

  • A Barrage of Rigorous Tools

    We verify invariants with symbolic execution, fuzzing, model checking, or AI tools from our partners, covering attack surfaces traditional reviews miss.

  • Reports That Go Beyond Bugs

    Our reports include documented invariants, system descriptions, and architecture notes: lasting documentation your team can reference long after the engagement.

  • OpSec Best Practices

    Beyond bugs, we recommend operational security improvements (key management, deployment procedures, access controls), building security into every layer.

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PhD researchers, AI-enhanced

  • Formal methods trained PhD researchers
  • In-house security and AI tooling development
  • People-first skills, AI-enhanced results
  • Low turnover team (avg tenure of 4 years)
Learn about our team

KaaS, your all-in-one place for fuzzing

  • Free infrastructure to run your campaigns
  • Test coverage and easy-to-read reports
  • Run your harness fuzzing anytime
  • AI agents integration for continuous fuzzing
Learn more about KaaS

Work we're proud of

From blockchain launches to aerospace systems: a sample of what we've secured.

See all our work

Why Runtime Verification

Formal Methods: the Security Edge in the Age of AI

As AI generates more of the code, the question isn't just whether it works, but whether it's correct. Formal methods define the standard. Everything else gets checked against it.

Reviewing critical software since 2017
Nearly a decade of reviews across any language: Rust, Go, C++, Solidity, JavaScript, and more. Our formal specification approach means the language is never the barrier; understanding the system is.
Trusted by Leaders Across Industries
DARPA, NASA, Boeing, the Ethereum Foundation, Solana, and Stellar have trusted us with critical systems, spanning aerospace, defense, and frontier technology.
Open-Source by Conviction
We build in the open. We maintain the K Framework (a formal methods platform used by researchers worldwide) and contribute to the broader security ecosystem.
AI-Ready Security Specifications
The specs and invariants we produce are machine-readable artifacts. We help teams encode security guarantees that AI agents can enforce throughout the development lifecycle.

Where we go deep

Three domains with a decade of work behind them, each with its own account of how the verification is actually done.

Embedded systems

Software that ships inside hardware, where a fault is physical. Formal methods applied to automotive, aerospace, and safety-critical control code.

Consensus protocols

Formal specifications of a protocol design and its properties, then mathematical proof that the design meets them. Casper and Algorand were both done this way.

Smart contracts

Semantics-based analysis and verification of on-chain code, built on the same K definitions the research side of the company maintains.

Everett HildenbrandtCEO of Runtime Verification

"We see a worrisome trend in the industry where timelines are a race to the bottom, and we are not willing to compromise. A Runtime Verification audit report is a stamp of approval from our team. It's also a signal to our client's users and community that security is a priority, not an afterthought."

Not ready for a full engagement yet?

Learn how a Design Review can help you ship more secure code in as little as one week.

Explore Design Reviews