Scan deep, sleep well

A42 – a platform that automatically monitors your company's external perimeter – domains, subdomains, exposed services, detects data leaks and vulnerabilities before they can be exploited by attackers

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Helping business to protect their data

A42 – not an option, but a must-have

Full control of your security

Trust, but verify. Even the most skilled staff and highly paid specialists are not immune to human error. Our service acts as a control mechanism - while a mistake for a specialist may result in dismissal, for you it could mean reputational damage, financial loss, or even legal liability.

Resource efficiency (time, funds)

Simplify your DevOps workflow. Our service can save dozens of hours of manual work, allowing your team to focus on what truly matters.

Automated and recursive scanning

Consistency is key. We conduct scheduled scans of all your subdomains to detect vulnerabilities and errors, delivering instant reports – all without the need for manual intervention from your team.

Critical Infrastructure

Essential Protection

Private Companies

Asset Defense

Healthcare Organizations

Data Security

Medium Businesses

Affordable Security

Digital Perimeter Control

Discovery of all subdomains, including shadow assets

People forget. A42 doesn’t.

We scan all your assets — automatically, bi-weekly.

Real risks, not noise

We detect exploitable vulnerabilities — not just alerts

Our Product

AI-Powered

Deep Reconnaissance

We leverage multiple techniques and tools to accurately map all related subdomains. Our integrated approach combines broad data collection, advanced detection tools and AI algorithms.

Automated

Automated Scanning

Our product performs scheduled, recursive scans to deliver thorough exposure reports, eliminating the need for manual input and ensuring continuous monitoring.

Real-time

Dark Web Monitoring

Our system scans dark web sources for leaked credentials and sensitive data linked to your domain that may have been shared to illicit databases.

Visual

Exposure Mapping

A visual tool that identifies and categorizes detected vulnerabilities, facilitating effective planning of your patch management and remediation processes.

Large-scale

IP Vulnerability Scanner

A tool that conducts large-scale scans of your business's IP address to assess its detectability and identify potential vulnerabilities.

Ready to Secure Your Business?

Get a comprehensive security assessment and protect your digital assets with our advanced cybersecurity solutions.

How It Works > 3 Simple Steps

Add Your Domain

No complicated setup, just connect and go

Confirm Ownership

Securely verify your digital assets

Receive a Security Report

Get real-time alerts and recommendations

free consultation or demo

Contact Us

Receive a list of services in exchange for your email and the domain you want to test for your first free security assessment. If no vulnerabilities are found, you will receive a "Verified by A42" certificate. If critical vulnerabilities are identified, we will provide you with a detailed report.

Meet Our Team

The cybersecurity experts behind A42

Olga Nasibullina

Co-founder, CEO

15 years of C-level leadership experience. NATO trainer. Trusted advisor to cybersecurity government agencies and private companies on building effective public-private partnerships.

Serhii Saraichykov

Co-founder, CTO

Experienced and certified Ethical Hacker, worked with E-cherga, E-construction, E-fish. Specialized in offensive security tested in cyberwar.

Valentyna Ozorina

Product Manager

As a project manager, she has successfully led and coordinated multiple cybersecurity projects, including international initiatives, with a focus on implementing best practices.

Maryna Yevdokymenko

Head of research

Experienced cybersecurity expert and Doctor of Technical Sciences, serving as a Professor at the Department of Infocommunication Engineering named after V.V. Popovsky at Kharkiv National University of Radio Electronics.