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Perimeter

Perimeter

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About Perimeter

Perimeter is a guild of world-class fuzzing specialists dedicated to securing blockchain protocols. They offer advanced fuzz testing services to identify vulnerabilities in smart contracts, enhancing the security and reliability of decentralized applications across various networks.

smart contract auditing

Perimeter is a specialized security research firm focused exclusively on advanced fuzzing services for smart contract protocols. As a guild of world-class fuzzing specialists, Perimeter delivers unparalleled security assurance by designing and executing invariant fuzzing suites that expose vulnerabilities often missed by traditional audits. With a mission to raise the standard of protocol security, the team combines deep protocol expertise with cutting-edge fuzzing techniques to help DeFi and Web3 projects secure their infrastructure.

By leveraging custom-built libraries and scaffolding, Perimeter delivers tailored fuzzing campaigns that cover even the most complex and mission-critical protocols. Their work is trusted by leading projects such as Origin Protocol, Immutable, Pendle, and Drips Network, with a reputation for uncovering subtle logic errors that would otherwise remain undetected. Perimeter doesn’t just test contracts—they help projects prevent catastrophic failures through continuous, expert-driven testing.

Perimeter stands at the forefront of smart contract fuzzing, bringing rigorous, customized security assessments to Web3 protocols. Unlike generic security audits, fuzzing is a highly automated testing methodology that generates and executes millions of randomized transaction sequences to identify logical inconsistencies, broken invariants, and exploitable behaviors. Perimeter’s experts specialize in both stateless and stateful fuzzing, giving projects deep insight into how their contracts behave under real-world and adversarial conditions.

The team’s unique methodology includes the creation of custom fuzzing harnesses using tools such as Echidna and Medusa, as well as proprietary libraries that extend the capabilities of public fuzzers. Their clients benefit from the team’s extensive experience with major DeFi systems and protocols undergoing live upgrades, governance changes, and continuous development. This means Perimeter not only finds bugs but ensures your protocol remains secure during future iterations.

Perimeter’s offering goes far beyond surface-level testing. Engagements include detailed reporting, PoCs (proofs of concept), integration-ready fuzzing suites, and even CI/CD support via Recon. Clients can opt for additional services such as testing reinforcement, post-launch monitoring, and continuous fuzzing for deployed contracts. For new protocols, the Perimeter Essentials package offers a fast, affordable entry point that sets a solid foundation for long-term security.

With an elite team led by veterans like 0xScourgedev and Rappie, Perimeter collaborates closely with clients to build fuzzing solutions that are not only robust but also extensible. Their engagements have uncovered issues missed by top-tier audit firms, and their public reports showcase the value of a specialized approach to security. In a space where exploits can cost millions, Perimeter offers proactive defense at a deeper level than audits or bug bounties.

Perimeter provides an unmatched level of security assurance through advanced fuzzing services:

Stateful & Stateless Fuzzing: Execute randomized transaction sequences that test your contracts across a wide range of actions and states to identify deeply hidden logic flaws.
Custom Scaffolding & Libraries: Leverage the industry's most advanced tooling to create bespoke fuzzing suites tailored to your specific contracts and security needs.
Enterprise Infrastructure: Benefit from high-performance fuzzing infrastructure via Recon to maximize fuzzing coverage and speed.
CI/CD Integration: Automatically test for security regressions on every code push with optional continuous fuzzing pipeline support.
Post-Deployment Monitoring: Adapt fuzzing suites to monitor live contracts for protocol upgrades or DAO proposals, maintaining security invariants over time.
Detailed Reporting & PoCs: Receive in-depth findings along with exploitable proof-of-concepts, making it easy to understand and prioritize vulnerabilities.
Protocol-Tested Expertise: Trusted by Origin Protocol, Berachain, Immutable, and others for securing large-scale DeFi systems.
Perimeter Essentials: A rapid, budget-friendly engagement for protocols new to fuzzing—delivering long-term security foundations in just one week.

Perimeter makes it easy for protocols to engage with elite fuzzing specialists and protect their systems:

Step 1: Visit the Website
Go to Perimeter and explore services, past reports, and testimonials.
Step 2: Request a Quote
Submit a request via this form to describe your protocol, timeline, and requirements.
Step 3: Choose Your Engagement Type
Select between Perimeter Essentials for rapid onboarding or a custom fuzzing campaign based on your protocol’s complexity.
Step 4: Kick Off Collaboration
Engage with the Perimeter team, led by 0xScourgedev and Rappie, to scope fuzzing targets, define invariants, and align goals.
Step 5: Receive Reports & PoCs
During the engagement, you’ll receive findings with accompanying proof-of-concepts, infrastructure integrations, and CI/CD-ready suites.
Step 6: Secure Your Protocol Continuously
Choose post-launch services like on-chain fuzzing or testing reinforcement to ensure your protocol remains secure through updates.
Step 7: Stay Connected
Reach out via X, Cantina, or email to continue optimizing your security posture.

Perimeter FAQ

Perimeter specializes in advanced stateful and stateless invariant fuzzing, going beyond traditional audits by using millions of randomized transactions to uncover deep, logic-based vulnerabilities often missed by manual reviews; their team builds custom fuzzing scaffolds and libraries tailored to each protocol, offering unmatched depth and automation—more at Perimeter.
Perimeter’s team leverages extensive experience in fuzzing top-tier protocols and employs enterprise-grade infrastructure via Recon, coupled with deep domain expertise to design precise invariants, isolate broken logic, and balance efficiency with coverage—making them uniquely equipped to handle even the most complex DeFi systems.
Perimeter Essentials is a one-week, discounted fuzzing engagement built for protocols new to fuzzing; it delivers a foundational fuzzing suite tailored to your codebase, designed for long-term extensibility and integration into audits or CI systems—ideal for startups looking to prevent early vulnerabilities while preparing for growth; details at Perimeter.
Yes, Perimeter offers optional CI/CD integration using its custom fuzzing suites and Recon to automatically run invariant tests on each code push, helping teams detect regressions early and ensuring continuous security assurance as protocols evolve.
Perimeter supports on-chain fuzzing through Recon, allowing fuzzing suites to interact with live deployed contracts and validate invariants in real blockchain environments—this service helps identify real-world vulnerabilities introduced through governance proposals or upgrades.