A consultancy firm based in The Netherlands providing penetration testing and auditing and subsequent threat mitigation services.

Ethical hacking and computer security training. Geneva, Switzerland.

MasterCard SDP compliant penetration and application security testing firm based in the United Kingdom. Offers articles, service information and contact details.

Provide penetration testing, web application testing, vulnerability assessments, continuous security verifications, wireless security testing, firewall testing, security policy development, and CESG CHECK.

Slovenian business dedicated to locating security problems in network systems software and hardware.

Offers a range of penetration testing and vulnerablity assessment services as well as policy development and security management.

Specializes in perimeter and penetration testing. Offers facts sheets, and security bulletins. Based in the UK.

Dedicated penetration testing services focusing on network application and Internet security.

An Irvine, California USA based company that provides assessment, audit, and vulnerability testing as well as firewalls, VPN solutions, and managed services.

Providing varying levels of network security audits.