OtterSec

OtterSec is a leading blockchain security auditing firm specializing in comprehensive smart contract audits and security assessments for Web3 projects. Originally independent security researchers, the team has established itself as a trusted partner for major blockchain ecosystems and protocols.

Core Services

OtterSec offers specialized security services including smart contract auditing, penetration testing (white and black box), formal verification, and advanced fuzzing techniques. The firm has secured over $36.82 billion in on-chain TVL and patched vulnerabilities worth over $1 billion across 120+ audited projects.

Key Strengths

The company excels in multichain expertise, having worked extensively as ecosystem partners with Layer 1 blockchains including Solana, Sui, Aptos, Near, and EVM chains. OtterSec has audited the Solana Core code, Account Compression, and core protocols for Aptos, demonstrating deep technical knowledge of blockchain infrastructure. Their client portfolio includes industry leaders such as Solana Foundation, Tether, Circle, MetaMask, LayerZero, Wormhole, and major DeFi protocols like Aave, Kamino, Jito, and PancakeSwap.

The firm is recognized for innovation in security tooling, having developed novel verification frameworks for Solana, differential compiler fuzzers for Vyper, and advanced transactional fuzzers that have discovered critical denial of service and integrity issues in blockchain infrastructure. Their research extends to Web2 attack surfaces in Web3 applications and MetaMask's Snaps sandboxing environment.

Notable Clients/Projects

OtterSec maintains ongoing relationships with Solana Foundation (core code audits), Sui Network, Aptos Labs, major protocols including Marginfi, Jupiter, Raydium, Tensor, Squads, and leading cross-chain infrastructure providers. The firm has completed formal verification for Aptos standard library and Kamino lending protocols.

Why Choose OtterSec

OtterSec stands out for its collaborative, community-driven approach to security. The team goes beyond standard audits to partner with clients through in-person events and ecosystem engagement. Their transparent audit process includes regular updates throughout the engagement, detailed reporting with actionable recommendations, and ongoing support post-audit. With proven expertise across multiple blockchain platforms and a 66% success rate in catching core security issues, OtterSec provides comprehensive protection for protocols launching or scaling in the blockchain ecosystem.