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OtterSec

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About OtterSec

Cybersecurity firm offering security audits for smart contracts across multichain ecosystems, with deep experience and fast dev collaboration.

smart contracts multichain

OtterSec is a leading blockchain security firm specializing in smart contract audits, vulnerability detection, and Web3 protocol protection. With over $36.82B in total value locked (TVL) secured and more than $1B in patched vulnerabilities, OtterSec plays a critical role in ensuring the stability of decentralized ecosystems. The company’s hands-on, research-driven approach has earned the trust of some of the most prominent projects across chains like Solana, Aptos, Sui, and Ethereum.

Built on a foundation of deep technical expertise and white-hat ethics, OtterSec takes a collaborative stance toward security—offering tailored audits, real-time updates, and continued engagement beyond the audit itself. Their security professionals don’t just test contracts; they research, teach, and contribute directly to core blockchain codebases, making OtterSec a trusted partner rather than just a service provider.

OtterSec was created to fill a significant gap in the blockchain ecosystem—proactive, in-depth, and adaptive security services for smart contract platforms and Web3 applications. As blockchains rapidly evolve, so too do the risks that come with decentralized technology. OtterSec was built with the belief that security must scale with innovation. By working closely with developers and core protocol teams, OtterSec provides not only audits, but continuous partnership throughout the lifecycle of a project.

The company has audited 120+ projects, patched over $1B in vulnerabilities, and helped safeguard protocols handling billions in user assets. Their clients include notable names such as Solana, Tether, Circle, LayerZero, MetaMask, and PancakeSwap. OtterSec's scope spans DeFi, bridges, compilers, wallets, Zero-Knowledge proofs, and more, giving them a truly multichain perspective on threat modeling and protocol defense.

OtterSec’s auditing process is structured yet flexible. It begins with an exploratory discussion, followed by information gathering and scoping. Clients receive transparent quotes and updates during the audit itself, and final reports are accompanied by post-audit support. This human-first, highly communicative model sets OtterSec apart in an industry often dominated by automated scanning tools and minimal contact.

The firm’s auditing methods include formal verification, fuzzing, and white/black box penetration testing. For instance, OtterSec’s research into the MetaMask Snaps environment and obscure compiler bugs like the G++ issue in Solidity highlight their dedication to advanced, real-world problem-solving. Their blog offers deep dives into cutting-edge vulnerabilities and their prevention.

When compared to industry players like Trail of Bits, Consensys Diligence, and OpenZeppelin, OtterSec stands out for its community-driven focus and deep specialization in ecosystems like Solana and Aptos. Rather than treating audits as one-off engagements, OtterSec builds long-term relationships and continues to support protocols through their evolution, contributing to the collective resilience of the Web3 space.

OtterSec provides numerous benefits and features that position it as a leading force in Web3 cybersecurity:

Multichain Audit Expertise: Deep technical experience across Solana, EVM, Aptos, Sui, Cosmos, and Near.
Community-Driven Auditing: Goes beyond the audit by participating in IRL events, hackathons, and developer initiatives to support client ecosystems.
Proven Track Record: Over $36.82B in TVL secured and $1B+ in vulnerabilities patched for major protocols.
Collaborative Approach: Frequent updates and transparent communication during the audit process ensure teams stay aligned and informed.
Advanced Techniques: Applies formal verification, fuzzing, pentesting, and exploit reproduction tailored to each project’s specific risk profile.
Audit Report Access: Public access to detailed audit reports, offering insights into past assessments and trustworthiness.
Thought Leadership: A technical blog that publishes detailed breakdowns of vulnerabilities, ZK-proof innovations, and real-world exploits.
Team of White Hat Hackers: Built by ethical hackers and researchers with deep blockchain and cybersecurity backgrounds.

OtterSec makes initiating a security audit simple for any Web3 project, whether you're building on Solana, EVM, or Aptos.

Visit the official website at osec.io and click “Get an Audit” to open the contact form.
Share your project details, including your code repository, protocol type, and scope. You can also specify whether you require formal verification, fuzzing, or pentesting.
The OtterSec team will initiate an exploratory discussion to better understand your architecture, goals, and risk areas.
Following information gathering, you’ll receive a scoped quote, timeline, and overview of the auditing methodology best suited for your project.
Once the audit begins, you’ll receive regular updates and access to the team for any clarification or support needs.
After completion, OtterSec delivers a detailed report, including security findings, exploit walkthroughs, and actionable remediations.
For follow-up support, the team remains available for retests, vulnerability verification, and continuous security enhancements.

OtterSec FAQ

OtterSec adapts its audit methodology depending on the protocol architecture. For example, Solana's parallel runtime requires unique logic path analysis, while EVM projects benefit from fuzzing and gas optimizations. The team has deep familiarity with Layer 1 ecosystems like Aptos, Cosmos, and Sui, allowing them to apply the right combination of formal verification, pen testing, and manual code review tailored to each tech stack.
Yes, OtterSec is one of the few audit firms that actively tests Web2 attack surfaces within Web3 applications. Their research into protocols like MetaMask Snaps demonstrates a deep understanding of how browser-level and backend threats can compromise smart contracts. The team uses both black-box and white-box testing to ensure vulnerabilities in off-chain components—like APIs or cloud functions—are also identified and mitigated.
OtterSec is a long-term security partner to the Solana Foundation, having audited not just apps, but the core protocol code itself—including innovations like Account Compression. Their close collaboration with Solana-native teams like Marginfi, Jito, and Raydium sets them apart as one of the few firms trusted to work at both the infrastructure and dApp layers.
Yes, OtterSec maintains communication with clients beyond the initial audit. After delivering the report, the team is available for follow-up consultations, retesting patched code, and answering implementation-specific questions. This makes them not just auditors, but ongoing security collaborators who ensure fixes are correctly applied and potential regressions are avoided.
Absolutely. OtterSec has conducted security research on advanced topics like Zero-Knowledge proofs and compiler vulnerabilities. Their open-source work on PoRv2 and in-depth analysis of Solidity compiler bugs proves their readiness to audit complex cryptographic systems and low-level infrastructure. These are high-risk areas where deep domain expertise is essential, and OtterSec is uniquely equipped to handle them.