What We Audit in Web3
Keep Web3 safe by protecting everything. Focus on execution layers, custom VMs, and complex wallets.
First, we define what needs to be checked by looking at your final code and design documents. We will give you a clear price based on how complex your project is and what you need. If you want to keep things private, we can sign a non-disclosure agreement (NDA) before we start.
Planning Your Audit
First, we define what needs to be checked by looking at your final code and design documents. We will give you a clear price based on how complex your project is and what you need. If you want to keep things private, we can sign a non-disclosure agreement (NDA) before we start.
Setting the Schedule
Next, we agree on the project terms and how you will make payments. We will set a firm timeline together so you know exactly when the audit begins and when it ends. This keeps the project moving forward on time.
Testing and Fixing
Our team performs a deep security scan using our own advanced tools. We will talk to you about what we find and help you understand the risks. After you apply the fixes, we will review them to make sure everything is safe. If your project is very large, we might do this several times to be safe.
Final Report and Advice
In the final step, you get a signed professional report that lists every finding and risk level. We also include helpful tips on how to keep your system secure in the future. This gives you a clear plan to protect your users and your reputation.
Web3 Audit Advantages
We use our unique tools and expert knowledge. This keeps your blockchain system strong and reliable every time.
Audit Reports
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Hear from Our Customers
“We had a great experience working with BlockSec on the security testing of Mega-EVM, our stateless validator, and the SALT data structure. They're responsive, diligent, and easy to collaborate with, with a fast feedback loop throughout the audit. Their deep expertise across both smart contracts and node-level systems made them a strong partner for complex infrastructure work.”
“On the audit side, the BlockSec team has left a very positive impression on us. Their audits are never a mere formality; instead, they dive deep into contract implementation details and specific business logic, covering edge cases and extreme scenarios that are often overlooked. The entire process was smooth and highly efficient. Their bug localization and remediation advice were clear and actionable, helping us significantly reduce potential security risks before product launch.”
“BlockSec has built a strong reputation for conducting highly technical audits for blockchains and smart contracts. Supporting Solidity (EVM-compatible ecosystems), Rust (NEAR & Solana), and Go (Cosmos), the company primarily relies on thorough manual reviews, enhanced by automated differential fuzzing tools and static analyzers. This approach allows BlockSec to identify deep logic flaws in code and provide actionable recommendations to ensure project security before launch.”
“BlockSec's deep expertise in smart contract security has been invaluable to exSat. Their rigorous audits consistently uncover subtle yet critical vulnerabilities, delivering clear, practical remediations. With their meticulous, code-level scrutiny, we gain unparalleled confidence in our protocol's integrity—making BlockSec our trusted partner for secure, resilient smart contracts.”
Why Organizations Choose BlockSec
Trusted by Industry Giants
We secure billions of dollars in assets and are the trusted security partner for the biggest names in the Web3 space.
Battle-Tested Experience
We have a proven track record of saving projects from massive losses and discovering critical bugs in major protocols before bad guys do.
Support Beyond the Audit
We don't leave you after the report is delivered; we help you fix issues, verify the changes, and monitor your project after launch.
Customized Testing
We don't use a "one-size-fits-all" approach; we build specific tests just for your unique project to catch edge-case problems.
Frequently Asked Questions
Top 10 "Awesome" Security Incidents in 2025
To help the community learn from what happened, BlockSec selected ten incidents that stood out most this year. These cases were chosen not only for the scale of loss, but also for the distinct techniques involved, the unexpected twists in execution, and the new or underexplored attack surfaces they revealed.
Newsletter - December 2025
In December 2025, the DeFi sector encountered three significant security incidents, resulting in total losses of approximately $19.7 million. Yearn Finance faced nearly $10 million in losses due to vulnerabilities in its yETH pool and legacy contracts. Trust Wallet suffered a malicious backdoor attack on its Chrome extension, leading to losses of about $7 million. Ribbon Finance experienced a loss of $2.7 million due to improper access controls.
Web3 Smart Contract & EVM Chain Audits | BlockSec
BlockSec secures Web3 with attacker-driven audits, chain reviews, and zero-day detection - battle-tested, blocking 20+ hacks and $20M+ losses.
