Smart Contract Security Reviews

Smart Contract Security Reviews for L1 & L2 Chains

Spearbit specializes in protocol-level reviews for foundational blockchain systems. Whether you’re building a new Layer 1 or scaling with a Layer 2, we deliver security audits trusted by core teams across the Web3 ecosystem.

We deploy expert researchers who understand the complex architecture of rollups, validators, consensus logic, and cross-chain communication. For deep and reliable security reviews of L1 or L2 systems, partner with Spearbit.

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282

Reviews completed

4500+

Vulnerabilities found

119

Projects secured

Why Spearbit for L1/L2 Protocols?

Infrastructure-Grade Security Expertise

Spearbit has reviewed Layer 1 chains, rollups, and bridging mechanisms supporting billions in value and global user bases.

Tailored to Complex Architectures

From modular base layers to custom settlement logic, our reviews adapt to your protocol’s unique technical stack and threat model.

Trusted by Protocol Teams

Leading blockchain projects rely on Spearbit’s bespoke audits to launch confidently and operate securely at scale.

Our Process

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Initial Consultation

We begin with an in-depth discussion to understand your organization, objectives, and specific security concerns.

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Scope Definition

Together, we define the scope of the review, including contracts, codebase size, and specific areas of focus.

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Deep Dive Analysis

Our team conducts a meticulous manual review complemented by advanced automated tools. We identify vulnerabilities, assess potential attack vectors, and evaluate the overall security posture.

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Collaborative Review

We maintain an open line of communication, providing regular updates and clarifications throughout the process.

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Comprehensive Reporting

Receive a detailed report outlining identified issues, risk assessments, and actionable remediation recommendations.

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Post-Review Support

We offer continuous support to address follow-up questions, review fixes, and ensure the effectiveness of implemented changes.

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Our Portfolio Speaks
For Itself

Spearbit has secured some of the most high-profile blockchain organizations, providing peace of mind to teams handling billions of dollars in value.

Join the ranks of teams that rely on Spearbit for best-in-class security reviews.

Elevate Your Security Posture

Request A Quote Today

FAQ

What types of Layer 1 and Layer 2 protocols does Spearbit work with?

We’ve audited a wide range of foundational systems, including proof-of-stake Layer 1s, optimistic and ZK rollups, data availability layers, and app-specific L2s. Our expertise spans both generalized and modular blockchain architectures.

How does Spearbit approach consensus and validator logic audits?

We analyze consensus mechanisms, validator incentives, slashing conditions, and block production logic to identify attack vectors, incentive misalignments, and edge-case failures that could compromise network security or decentralization.

Can you audit sequencer and bridging components for L2s?

Yes. We review sequencer logic, cross-domain messaging, bridge contracts, fraud/finality proofs, and fallback mechanisms. Our team understands the systemic risks tied to centralized or untested bridge implementations in rollup-based systems

What is the scope of a protocol-level security review?

Scope may include smart contracts, node-level logic, off-chain infra, governance modules, staking flows, or DA integrations—defined collaboratively to align with your architecture and launch roadmap.

How do you handle large or modular codebases typical of L1/L2 projects?

We assemble a team with relevant specialization across your stack—splitting complex reviews into concurrent workstreams covering execution layers, tokenomics, state commitments, or upgradeability paths.

Do you support audits for live networks or upgrades to mainnet chains?

Absolutely. We routinely audit live Layer 1s and Layer 2s prior to upgrades or feature rollouts. We evaluate backward compatibility, validator safety, and migration risks, especially in high-stakes environments.

What are the most common vulnerabilities you identify in L1/L2 audits?

Protocol-specific issues like MEV exposure, incorrect slashing logic, validator denial-of-service, cross-chain replay risks, upgrade path flaws, or misconfigured sequencing are common in L1/L2 ecosystems.

What kind of deliverables can protocol teams expect?

Our final reports include detailed issue write-ups, severity assessments, reproducible steps, and remediation guidance—with special attention to network-wide risks, economic implications, and validator safety.

Why do leading Layer 1 and Layer 2 teams choose Spearbit?

We combine deep manual analysis with protocol-level specialization and an unmatched researcher network. Teams building critical infrastructure rely on Spearbit to secure everything from consensus to cross-chain logic.

How does team composition differ between Spearbit and Cantina reviews?

Spearbit provides high-end security reviews with teams hand-selected from a network of top Web3 security talent. Spearbit reviews must include a minimum of two Lead Security Researchers. These reviews are designed for depth and specialization, assessing some of the most complex decentralized systems in the ecosystem.

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Cantina Reviews allow for more flexibility, providing you with a team of expert security researchers without Spearbit’s two Lead Security Researcher minimum. This model allows for faster onboarding and/or budget-flexibility while leveraging the same pool of expert security talent.