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Trail of Bits

High-end security research and engineering firm known for deep code audits, cryptography reviews, and smart-contract security work.

CompanyPenetration Testing Firms

Pricing: Custom (contact sales)

Reviewed by the Cyber Vendor Guide editorial team against the public sources cited below · Last reviewed June 2026 · How we review listings

What is Trail of Bits?

Co-founded in 2012 by Dan Guido and headquartered in New York City, Trail of Bits combines academic-style security research with hands-on engineering. The firm is best known for advanced software assurance work across cryptography, AI/ML, blockchain, and low-level systems, and for releasing widely used open-source tooling such as the Slither smart contract analyzer.

Best for: Crypto/DeFi protocols and security-conscious tech companies needing deep code, cryptography, and AI assurance work

Pros

  • Strong academic and research-grade reputation with published peer-reviewed work
  • Open-source tooling footprint including Slither, Echidna, Manticore
  • Recognised leader in smart-contract auditing for top-tier protocols
  • Engineering depth that translates findings into custom defensive tooling

Things to check

  • Premium pricing and limited bench means long lead times
  • Highly specialised, not a fit for routine commodity pentesting
  • No published price list; bespoke statements of work per project

Reported in public reviews and vendor documentation. See sources below.

Key Features

Application and protocol security reviews
Cryptography design and implementation audits
Blockchain and smart-contract security assessments
AI/ML system security and red teaming
Reverse engineering and binary analysis
Custom security tooling and engineering
Threat modeling and secure development consulting
Public-sector research and DARPA program execution
Specialised training (Empire Hacking, Crytic)

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Sources & references

Where the information on this listing comes from. Always verify pricing and capabilities against the vendor before a purchasing decision.

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Key facts

Pricing
Custom (contact sales)
Model
Fixed-scope research engagements
Founded
2012
Visit websiteView on GitHub

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Where Trail of Bits appears

Guides

Certifications

SOC 2, ISO 27001