Perimeter is a security research firm specialized in invariant fuzzing services.
Perimeter's mission is to deliver the highest quality fuzzing services to protocols by uniting the world's foremost fuzzing specialists. We possess extensive expertise in fuzzing a diverse range of protocols, from smaller, niche protocols to some of the largest and most complex in DeFi.
In order to deliver on our mission, we have developed the most advanced scaffolding and libraries, enabling us to create highly sophisticated fuzzing suites tailored to meet the unique challenges of each protocol.
- 0xScourgedev - CEO, Lead Fuzzing Specialist
- Rappie - CTO, Lead Fuzzing Specialist
- Antonio Viggiano - Advisor, Lead Fuzzing Specialist
- Josselin Feist - Lead Fuzzing Specialist
| Protocol | Engagement Type | Completed | Report | Code |
|---|---|---|---|---|
| Private | Bespoke Fuzzing | Dec 2025 | ||
| Private | Bespoke Fuzzing | Dec 2025 | ||
| Zest Protocol | Invariant Driven Development | Oct 2025 | ||
| Immutable | Defensive Fuzzing | Sep 2025 | ||
| Berachain | Offensive Fuzzing | May 2025 | ||
| Berachain | Offensive Fuzzing | Apr 2025 | ||
| Origin Protocol | Offensive Fuzzing | Mar 2025 | Report | Code |
| Berachain | Defensive Fuzzing | Jan 2025 | ||
| Berachain | Defensive Fuzzing | Dec 2024 | ||
| Berachain | Defensive Fuzzing | Dec 2024 | ||
| Berachain | Defensive Fuzzing | Nov 2024 | ||
| Berachain | Defensive Fuzzing | Oct 2024 | ||
| Berachain | Defensive Fuzzing | Sep 2024 | ||
| Immutable zkEVM Bridge | Defensive Fuzzing | Aug 2024 | Report | Code |
| Tapioca DAO | Testing Reinforcement | Jun 2024 | ||
| Tapioca DAO | Testing Reinforcement | May 2024 | ||
| Origin Protocol | Offensive Fuzzing | May 2024 | Report | Code |
| Private | Offensive Fuzzing | Apr 2024 | ||
| Drips Network | Defensive Fuzzing | Jan 2024 | Code | |
| Private | Offensive Fuzzing | Nov 2023 |
Below are some testimonials of our prior work.
Berachain proof-of-liquidity is one of the biggest innovation in the L1 space. For us innovation is always coupled with ensuring the highest security. That's why we partnered with Perimeter to run one of the best in-class invariant testing campaign. Perimeter did a tremendous job in testing any possible scenario, identifying the most relevant invariants and running extremely complex simulations.
- Bearlusconi, Berachain
@Immutable recently engaged @perimeter_sec to create fuzzing harnesses and test our L1 bridge contracts. We were really impressed with the team's professionalism and high quality report 🙏 @0xScourgedev @rappie
I engaged 0xScourgedev for fuzz testing on behalf of Pendle, and I was impressed with his dedication and willingness to go above and beyond. He was very responsive and committed to delivering quality results, consistently addressing any queries or concerns promptly. Overall, 0xScourgedev did a great job ensuring the robustness of the contract. We look forward to working with him again in the future.
Rappie found some extremely subtle behaviors in our code that many others missed. He not only uses the cutting edge of multiple fuzzing engines, but also helps shape how these fuzzers are built. We've been delighted to use his mastery to make our contracts more secure.
Engagement has been great and I'm sure Alex would second the sentiment. digging into the code with care and precision, excellent communication and standups, educational In the top tier of security researcher contract engagements from my experience
Rappie went above and beyond to deeply understand our protocol and cover all the edge cases. His experience and knowledge about the art of fuzzing is unparalleled. Overall he is an incredible security expert, we certainly will be returning to him with our future smart contracts.
So we are happy of what has been done so far, definitely useful for us to go in the right direction.
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