Smart contract audit

Line-by-line audit of smart contracts and protocol logic before deployment: manual review, invariant testing and review of the fixes.

AI, Web3 and cryptography

A deployed contract cannot be patched on a quiet afternoon. Its code is public, its funds are one transaction away, and a flaw is exploited by whoever reads it first. The audit has to happen before deployment and has to be done by people who read every line.

Two auditors review the code independently and then compare results. Automated analysis and fuzzing support them, but the findings that matter come from understanding what the protocol promises and looking for the state in which the promise breaks. Contracts are one part of the risk: keys, upgrade rights and off-chain components are reviewed with them.

01Scope

What we test

  • Access control, ownership and privileged functions
  • Reentrancy, unchecked external calls and callback behaviour
  • Arithmetic, rounding, precision loss and unit handling
  • Economic logic: price oracles, flash loans, slippage, liquidation, reward accounting
  • Upgradeability: proxies, storage layout, initialisers
  • Signatures: replay, malleability, permit flows, domain separation
  • Cross-chain messaging and bridges
  • Denial of service: gas limits, unbounded loops, griefing
  • Deployment scripts, administrative keys and multi-signature setup

02Approach

How the work is done

  1. Specification

    We establish what the protocol is meant to guarantee. Where no specification exists, we write the invariants down and agree them with you.

  2. Independent manual review

    Two auditors read the code line by line, separately. Their notes are merged only after both have finished.

  3. Automated analysis

    Static analysis, fuzzing and invariant tests are run against the agreed properties. Tests written during the audit are handed over.

  4. Fix review

    Your fixes are reviewed against the original findings. The final report states the commit that was audited and the commit in which each issue was resolved.

Methodology

03

What you receive

  • Report bound to a commit hash, with the status of every finding after the fix review
  • Invariant and fuzz tests written during the audit
  • Description of privileged roles and of the trust assumptions of the protocol
  • Executive summary for management
  • Technical report: every finding with evidence, CVSS 4.0 vector, CWE class and fix
  • Debrief call with your engineers
  • One retest of every finding within 60 days of the report
  • Attestation letter after the retest

04

What we need from you

  • A frozen commit of the code in scope
  • Documentation of the intended behaviour, or time with the developers to establish it
  • The existing test suite and deployment scripts
  • A list of external protocols and oracles the contracts depend on

05Standards

Standards behind the method

06Questions

Questions about this service

Does an audit guarantee that the contract is safe?

No, and nobody can honestly give that guarantee. An audit is a time-boxed review of a specific commit. It reduces risk substantially and documents what was examined. The report says so in plain words.

Which languages and chains do you work with?

Solidity and Vyper on EVM chains are the core of the work. For other languages and virtual machines we confirm during scoping whether we have the right specialists and decline when we do not.

Can the code change during the audit?

The audit is bound to a frozen commit. Changes made during the audit are reviewed as a separate scope, otherwise the report would describe code that no longer exists.

Will you publish the report?

Only if you ask us to. A published report contains the full list of findings with their final status; we do not issue shortened versions that omit issues.

08Request

Tell us what needs testing

  • Website check free of charge
  • Reply within 1 business day
  • NDA before any technical detail
  • Fixed price for paid engagements
  • No obligation

Request an assessment

Describe the systems and the goal. A manager replies within 1 business day with clarifying questions and the next step.

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A sole proprietor writes their own name.

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Free check

We check your website free of charge

If we find no problems, you receive the report free of charge as well. You pay for the report only when we find problems, and its price depends on their number and severity.

Terms of the free website security check

Application security

Infrastructure and cloud

Adversary simulation

AI, Web3 and cryptography

Programs and assurance

Application security

Free website security check

We look at your website from the outside, the way an attacker does, and check whether it can be broken into: weak settings, outdated software, exposed files, unsafe forms. The check is free of charge.

Application security

Web application penetration testing

We try to break into your web application the way a real attacker would: log in to the accounts of other people, read the data of other customers, change prices or orders. You learn what is possible before criminals do.

Application security

API security testing

An API is the channel through which your app, your website and your partners exchange data with your servers. We check that nobody can use it to read or change data that is not theirs.

Application security

Mobile application penetration testing

We examine your iOS or Android app and the servers behind it: what the app keeps on the phone, what can be extracted from it and whether its requests can be tampered with.

Application security

Secure code review

Our specialists read the source code of your product and find the mistakes that lead to a break-in, including those that cannot be seen from the outside.

Infrastructure and cloud

Cloud & Kubernetes security assessment

We check how your cloud is set up (AWS, Azure, Google Cloud, Kubernetes): who has access to what, which data is open to the internet and how far an attacker gets after the first mistake.

Infrastructure and cloud

Infrastructure penetration testing

We test your servers and your office network from the outside and from the inside: can an attacker get in, and once inside, reach the accounting system, the mail or the backups.

Infrastructure and cloud

External attack surface assessment

We find everything your company exposes to the internet, including what has been forgotten: old websites, test servers, leaked passwords. Then we show which of it can be attacked.

Infrastructure and cloud

CI/CD & supply chain security

We check the path your code takes from the developer to the customer: build servers, third-party libraries, access keys. Whoever controls that path controls your product.

Adversary simulation

Red team operations

A full-scale exercise. Our team plays a real attacker with a goal, for example to reach customer data, and you see whether your defence notices and stops it.

Adversary simulation

Purple team exercises

Our attackers and your defenders work side by side: we show an attack technique, your team checks whether it sees it, and the gaps in monitoring are closed on the spot.

Adversary simulation

Social engineering assessment

We test people, not machines: the phishing emails, calls and messages that attackers use to obtain passwords. You learn how many employees would be deceived and what to train.

AI, Web3 and cryptography

AI & LLM security testing

If your product has a chatbot or another AI model, we check whether it can be talked into revealing confidential data, breaking its own rules or acting on behalf of someone else.

AI, Web3 and cryptography

Smart contract audit

Before a smart contract holds money, we look for mistakes in its code that would let someone withdraw or freeze the funds. After deployment such mistakes cannot be corrected.

AI, Web3 and cryptography

Cryptography review

We check how your product encrypts data and protects keys: whether the right algorithms are chosen and whether they are applied correctly. A mistake here makes the encryption useless.

Programs and assurance

Bug bounty program management

A bug bounty is a program in which independent researchers look for vulnerabilities in your product and are paid for each one they find. We launch and run such a program for you.

Programs and assurance

Vulnerability disclosure program (VDP)

A public page and a procedure that tell researchers how to report a vulnerability to you safely. Without them reports get lost or arrive as threats. We set the process up and handle incoming reports.

Programs and assurance

Continuous penetration testing

Instead of one test a year, we test every significant change of your product throughout the year, so that a new vulnerability does not wait for months to be found.

Programs and assurance

Compliance-driven penetration testing

A penetration test arranged so that an auditor, a regulator or a large customer accepts its report: PCI DSS, DORA, NIS2, ISO/IEC 27001, SOC 2.

Services of interest

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Domain or URL of the website or of the main system to test, for example app.example.com.

What needs testing, why now, and any deadline or compliance requirement. No passwords, keys or vulnerability details.

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