Precision, trust and speed in cyber defense.
QUIRSO delivers Rapid Incident Response and Cyber Defense for organizations that need seasoned experts in critical situations. We combine operational leadership, technical depth and clear communication without jargon so you quickly gain clarity, control risks and stabilize operations with confidence.
QUIRSO GmbH is a DFIR boutique specializing in Rapid Incident Response, founded in Potsdam in 2026 by experienced experts from incident response and crisis management.
We help organizations handle cyberattacks quickly, effectively and sustainably - from targeted APT attacks through to complex ransomware incidents.
We help you stay well prepared for cyber emergencies and keep possible business impact as low as possible.
Strong preparedness and clear communication make our service stand out - without jargon.
Your navigator through a cyber crisis with overview and a digital war room.
Available 24x7 with convenient click-to-call directly through our QRC.
Continuous preparedness audits keep systems and data current.
Cyberattacks are now part of business reality. What matters is not whether an incident happens, but how quickly, professionally and confidently you respond. This is exactly where QUIRSO comes in.
As a specialized DFIR boutique, we support organizations in critical situations with field-tested Incident Response and modern digital forensics. Our focus is technical excellence, clear processes and collaboration on equal terms. From many real incidents, we know what matters: fast situation assessment, clean evidence handling, controlled containment and reliable decision support for management and IT.
Alongside direct support for end customers, we also act as a discreet partner for IT consultancies, system houses and security providers without their own DFIR unit. We integrate smoothly into existing structures and help reduce complexity - professionally, loyally and reliably.
Whether as your direct contact during an incident, your retainer partner for emergencies or a specialized DFIR unit within a partner network:
Digital threats to the German economy are growing rapidly - and the pressure to act has never been higher. According to a 2025 Bitkom study, almost 90% of companies feel threatened by cyberattacks such as data theft, sabotage or industrial espionage. Financial losses from cyberattacks alone exceed 200 billion euros per year and now account for roughly 70% of all losses. Cyberattacks no longer hit only large corporations, but especially medium-sized businesses that do not have enterprise-level defense budgets.
QUIRSO GmbH has made it its mission to make a meaningful contribution to protecting the German economy through innovative cybersecurity solutions. Find out today how we can help you strengthen your company's cyber resilience.
Our portfolio focuses on digital forensics and incident response. We also support decision makers with selected services in adjacent areas to manage risks, improve resilience and remain ready to act at any time.
Whether Threat Hunting, SOC Effectiveness Assessment, Purple Teaming, Phishing and Awareness or Red Teaming, we offer comprehensive cybersecurity services. Ask us for your individual offer.
When cyber crises bring everything to a halt. Your emergency access to the QUIRSO Response Center - your navigator through the cyber crisis. Our QRC is not only a highly secure and highly available data exchange platform; during an incident, it becomes your digital war room for collaboration among everyone involved.
Navigator through the Cyber Crisis
The QUIRSO Rapid Incident Response Retainer combines field experience from real incidents with the QUIRSO Response Center - your personal navigator through a cyber crisis. Our incident response approach combines live forensics and threat intelligence to enable fast investigation, containment and restoration of business operations.
For companies with up to 100 employees
For companies with up to 300 employees
For companies with up to 500 employees
Note: These are price examples that can be adapted individually to customer needs.
*Also available as Extra Large on request for companies with more than 500 employees.
**QUIRSO is not an insurer and not an insurance intermediary. Insurance services are neither offered nor brokered.
We are the three founders and managing directors of QUIRSO GmbH and share the conviction that cybersecurity must work clearly, responsibly and reliably in critical moments. With many years of experience in cyber defense, incident response and digital forensics, we have guided companies through acute crisis situations. QUIRSO stands for a focused, transparent approach based on excellence, personal responsibility and trusted partnership. As founders, we stay closely involved and guide our customers safely through cyber crises.
More than 25 years of IT security experience. From large corporations to cyber defense startups, Stefan has delivered successful C-level cybersecurity projects in many management roles, built managed security services and other business units, and led large interdisciplinary teams. Stefan is your contact for sales and partner business.
There is almost nothing Denis cannot do. His special strength is creativity, which leads him to unconventional solutions. Cyber defense is his passion, and he gladly shares that enthusiasm with the people around him. With more than 15 years of experience, he brings his full expertise in detecting, analyzing and defending against cybersecurity incidents to the benefit of our clients.
Cagatay has already helped many companies in their most urgent moments. He brings experience from several hundred incidents. His natural curiosity drives him to keep looking for the best solution for his clients. He stays focused and completely calm even under high pressure. With 10 years of experience in digital forensics and incident response, Cagatay has seen almost every possible situation.
Our partners complement our Incident Response service with specialized, adjacent capabilities. Together we cover related domains and create holistic solutions for demanding security requirements.
info@quirso.de
+49 331 28129869
August-Bebel-Straße 26-53
14482 Potsdam
Germany
24/7 on 365 days a year
Business hours: 08:00 - 18:00 Uhr
If you suspect something is wrong, every minute counts. Contact us - we will structure the next steps together with you.