Professional smart contract audits for maximum security
Smart contract auditing is a tool to ensure the security and reliability of blockchain projects. We provide an in-depth and professional code analysis service to protect your business and clients from potential threats and errors. FreeBlock experts perform smart contract checks, identify vulnerabilities, and provide recommendations for fixing them.
Our services
We review all categories of contracts: for ERC-20, ERC-721, and ERC-1155 tokens, decentralized exchanges (DEX), liquidity pools, NFT marketplaces, and decentralized autonomous organizations (DAO). We conduct smart contract audits for crowdfunding, staking contracts, voting contracts, oracles, access control management contracts, and digital asset storage.
We analyze and test code using automated tools and manual assessment methods. We identify potential smart contract bugs that could cause fund leakage or disrupt project operations. We use modern blockchain audit methodologies. We perform detailed code analysis using Mythril and Slither.
We audit code, analyze cryptographic methods, and verify the structure and logic of algorithms. We use automated scanners and dynamic analysis to find potential weak points. We detect issues early in development. As part of smart contract testing, we use Echidna and Manticore to model attacks and perform stress testing.
We identify smart contract errors that may lead to unintended consequences after launch. We review execution conditions, test logic, and verify compliance with business rules.
We pay special attention to checking smart contracts for scam and fraud schemes. We use specialized tools and methodologies for automated and manual assessment of suspicious scenarios. We confirm the contract’s security and, as part of a comprehensive analysis, run online scam checks on smart contracts.
We apply formal verification methods for smart contracts with mathematical proofs of correct execution of the conditions embedded in the code. In blockchain audits, we use the K Framework and Coq to ensure complete security and eliminate errors in smart contracts.
We actively integrate automated analysis and testing systems into our workflow. This approach makes it possible to detect smart contract bugs quickly and accurately. These tools thoroughly check smart contracts for scams and find vulnerabilities that are difficult to spot. This proactive approach keeps smart contract security at a high level and minimizes risks.
technologies
Why choose us
We conduct smart contract audits developed for DeFi, NFT, blockchain games, crypto exchanges, asset tokenization, medical services, insurance, logistics, international trade, intellectual property rights management, energy, utilities, healthcare, legal agreements, the music industry, film and entertainment, smart home operation, the Internet of Things (IoT), education, and digital identity.
We continuously improve smart contract verification methodologies and tools. We use the latest advances in automated analysis and manual reviews. We provide customers with the highest audit quality. We perform all necessary procedures — from bytecode decompilation to developing recommendations for mitigating potential threats.
We actively use automated scanning and static analysis to quickly and thoroughly identify both minor and complex large-scale vulnerabilities in code. We implement proven methodologies. We minimize any risks when launching or updating contracts.
We regularly update working algorithms and improve processes within blockchain audits. Before each review, we analyze business goals in detail to select the most effective solution. We take into account the specifics of business processes, identify unique risks, and apply suitable smart contract verification methods.
Entrust smart contract security to professionals
Want to protect your project from bugs, scam incidents, and attacks? Order a smart contract audit now.
We will help you strengthen security, build trust, and stabilize your solution’s functionality. Time is money. Take your business security into your own hands!
Smart contract audit FAQ
What does a smart contract audit include?
The audit covers a manual line-by-line code review, automated analysis, verification that the business logic matches the documentation, and a gas efficiency assessment. You receive a report with vulnerabilities ranked by severity and remediation recommendations.
Which vulnerabilities do you find most often?
Common issues include reentrancy attacks, access control mistakes, integer overflows, front-running exposure, rounding errors, and logic that diverges from the intended tokenomics. We also specifically review admin functions and centralization risks.
How long does an audit take?
Reviewing a simple token contract takes 3–5 business days. An audit of a multi-contract DeFi protocol takes 2–4 weeks. The timeline depends on the code size and logic complexity; we give an estimate after reviewing the repository.
What tools do you use during the review?
We combine the Slither and Mythril static analyzers, fuzzing with Echidna and Foundry, symbolic execution, and custom test suites. Automation complements, but never replaces, manual analysis by experienced auditors.
What will I get as the audit deliverable?
The result is a detailed report: a list of findings with severity levels, exploitation scenarios, remediation guidance, and an overall code quality assessment. After you apply fixes, we run a re-audit and confirm the issues are resolved.
Do you audit contracts written in languages other than Solidity?
Yes. Most of our work is Solidity and Vyper for EVM networks, but we also review contracts for Tron and TON. If your project uses a non-standard stack, we will discuss audit feasibility individually.