WebSec has ethical hackers (also called IT security consultants, penetration testers or pentesters). We deploy these colleagues at clients to detect errors and security problems in our clients information systems, networks, applications and servers, in order to optimize their security. These professionals know the way a hacker works and thinks, this knowledge is used by our security experts to ensure a secure IT environment for our customers.

WebSec operates internationally with offices in Europe and the United States.

Headquarters (NL): Keurenplein 41, Unit A6260, 1069 CD Amsterdam, The Netherlands
US Office: 1021 E Lincolnway, Suite #6400, Cheyenne, WY 82001, United States

The trade name WebSec has been around since 2018, previously registered with the Chamber of Commerce under the name 'OS.SI Consulting B.V.' Since August 3, 2020, WebSec has become an independent security firm under a parent company 'WebSec Holding B.V.'

WebSec delivers high-quality cybersecurity services with a unique combination of flexibility, expertise, transparency, and immediate availability.

Flexible & Fast: Our services are available on a project basis, through subscriptions, or as managed services—fully tailored to your organization. We also provide experienced professionals through our dedicated security staffing branch.

Broad Expertise: Our work spans three core domains: Offensive Security (e.g., pentests and red teaming), Defensive Security (e.g., threat detection and incident response), and IT Governance, Risk & Compliance (e.g., ISO 27001 and NIS2 support).

Certified Quality: WebSec is officially certified under CCV Pentest (v2.0), ISO 27001, and ISO 9001, confirming the quality and professionalism of our services and processes.

Transparent: We maintain clear communication and provide regular updates, ensuring you’re always informed about progress and results.