How long does a smart contract audit take?

The timeline for a smart contract audit depends on the complexity of the project. We begin with an evaluation phase to estimate the scope, timeline, and cost. Typically, audits are completed within a few weeks, but we work closely with you to meet your specific deadlines.

How much does a smart contract audit cost?

On average, a smart contract audit costs from $15,000 to $22,000. The cost and duration of the audit depend on many factors, such as the complexity of the project, the amount of code, and the customer’s timeline. After reviewing your code, we will be able to provide you with approximate figures.

How do I prepare for a smart contract audit?

To prepare for a smart contract audit, ensure your code is complete, follows best practices, and is well-documented. Provide clear functional and technical requirements, set up the development environment, and include comprehensive unit tests. This helps auditors thoroughly review your project and deliver the best results.

What happens if vulnerabilities are found?

On identifying vulnerabilities, we provide a detailed report outlining the issues and recommending solutions. After you’ve addressed the findings, we conduct a follow-up review to ensure all vulnerabilities have been successfully remediated

Smart Contract Audit

Q: What is a smart contract audit?

A smart contract audit is a thorough review and analysis of a smart contract's code to identify and fix security vulnerabilities, logical errors, and compliance issues.During an audit, security experts examine the contract's logic, functions, and dependencies, using both automated tools and manual reviews. The goal is to prevent issues such as developer errors, potential exploits, or external threats that could compromise the contract's integrity and the assets it manages.

Prevent costly exploits, protect user funds, and launch with confidence. Hacken’s smart contract audit combines senior-led code review, structured testing, and real-world exploit analysis – trusted by 1,500+ projects securing over $180B+ in digital assets.

Security partner for Web3 builders, enterprises, and governments since 2017

24003: vulnerabilities identified
60+: certified security engineers
ISO 27001: certified
SOC 2: Type II compliant

What is a smart contract audit?

A smart contract audit is a structured security review of a smart contract's source code. Auditors examine logic, dependencies, permissions, and state transitions to find vulnerabilities and high-impact edge cases before they reach production.

Professional audits combine three layers:

Automated scanning:

detect known vulnerability patterns across the full codebase.

Manual code review:

senior engineers analyze logic flaws, access controls, and economic exploits that tools miss.

Dynamic testing:

fuzzing, invariant checks, and integration tests to stress-test behavior.

Why audits are critical in 2026

$4.0B was lost in 2025. $512M (12.8%) came from smart contract vulnerabilities, while $2.12B (53%) came from access-control failures. source

In practice: the biggest damage comes from broken authorization and control paths. That's why we focus on who can do what, under which constraints, and how funds move – not just pattern matching.

Regulatory and listing requirements are rising. EU regulatory frameworks (including MiCA) raise expectations around security and risk controls, and major exchanges and partners commonly require third-party audits for listings and integrations.

Why choose Hacken

8+ years

1,500+ clients

1,900+ audits

Double coverage audits

Two senior auditors review in parallel to reduce blind spots and increase accuracy.

Dedicated delivery manager

A single point of ownership to keep scope, timeline, and communication tight.

Direct access to auditors

Ongoing guidance throughout the engagement – fast answers, actionable fixes.

Real-time audit portal

Live progress tracking, findings management, and role-based collaboration in Hacken Portal.

Fuzz & invariant testing

Deeper detection for edge cases and unexpected states – delivered post-audit when in scope.

Verified remediation

Submit unlimited in-scope fixes within two weeks and confirm everything is resolved pre-deployment.

Post-audit reassurance

Traditional audit with crowdsourced security testing to increase coverage beyond a single review cycle.

Hear from our clients

Isha Tyagi

Technical Program Manager, Near

We highly recommend Hacken to anyone in need of Web3 security services and a reliable partner for their blockchain initiatives. Their team's professionalism and expertise in the security space have helped us to secure an ecosystem for our users.

Ilya Naryzhnyy

CIO, 1inch

Adding to our long record of security audits, the latest Hacken audits of the 1inch Business portal and API products further reinforce 1inch as one of the most rigorously audited protocols in DeFi.

Jason, Seong Ho Lee

DeFi Product Owner, Wemade

Hacken has provided highly professional audits with outstanding quality. We are delighted to work with such a well-known and trusted security vendor.

Sunny Lu

CEO, Vechain

Hacken founders inherited quality, professionalism, and integrity from Deloitte, their ex-employer.

Tony Wei

CTO, Gate.io

Internal stakeholders are impressed with the work Hacken has completed so far. An organized team, they've managed the project well, never letting the six-hour time difference get in the way of productivity. Customers can expect an experienced and professional partner.

Qevan Guo

Co-founder, IoTeX

As our security partner, Hacken's team of experts is a pleasure to work with. Their persistence in making recommendations and solving problems is impressive.

Ruben Guevara

DevOps Engineer Security Oriented, PAID Network

They've extended their background and clarification on the subject to ensure the project's success.

What you get from a Hacken smart contract audit

Prioritized findings your engineers can ship against

Clear severity, impact, and fix guidance – structured for fast triage and remediation.

Verifiable PoCs for High/Critical issues

For severe findings, we include exploit descriptions as verifiable scenarios so your team (and stakeholders) can understand real-world risk.

A report you can share with partners and exchanges

A clean audit narrative: scope, system overview, risks, findings, definitions, fuzz/invariant results if applied.

Remediation verification

You can submit in-scope remediations within two weeks; we re-check fixes, confirm they don't introduce new risks, and update statuses for the final report.

Real-time visibility in Hacken Portal

Track progress, collaborate with the team, and manage findings in one place with role-based involvement and live tracking.

Ready to discuss your audit scope?

Share your repo, scope, and timeline – we'll propose an audit plan and estimate.

Our smart contract audit process

A repeatable methodology built for speed and depth: double manual coverage, structured testing, and real-time reporting.

Explore our full audit methodology

Most common smart contract vulnerabilities

Based on insights from 1,900+ smart contract audits, the following vulnerability classes appear most frequently – and account for the majority of high-impact security incidents when left unaddressed.

Reentrancy & read-only reentrancy

Attackers call a function before the previous execution completes, draining funds in a loop. Read-only reentrancy exploits view functions to manipulate pricing data in external protocols.