Leviathan Security Group

Seattle, Washington, United States

Specializes in penetration testing and risk advisory services

Leviathan Security Group, founded in 2006, is a cybersecurity consulting firm headquartered in Seattle, Washington. The company is dedicated to helping some of the world’s largest companies execute their security vision across products, services, and platforms. With nearly 20 years of experience, Leviathan has secured an elite group of consultants across the United States and internationally.

The firm offers a range of services including web application penetration testing, secure code review, network penetration testing, and smart device and IoT security assessment. They also provide vendor security risk advisory services and virtual Chief Information Security Officer (VCISO) services. Leviathan's approach is to improve security confidence for organizations by not performing box-checking exercises but rather focusing on enhancing security processes.

Leviathan Security Group is recognized for its commitment to superior customer experience and satisfaction. Their expert teams specialize in securing IoT, smart devices, and premarket medical technology. Clients appreciate their professionalism and the ability to uncover security gaps that other firms may miss, making them a valuable partner for organizations prioritizing information security.

20
YEARS IN BUSINESS
1
SERVICES

Capabilities

Services

What these services involve

Penetration Testing
Penetration Testing for cybersecurity buyers. Clear scope, measurable outcomes, and reliable delivery.

Agency details

Team size
51-200 people
Founded
2006 (20 years)

About this agency on Agency List

Leviathan Security Group holds an Agency List Score of 72 out of 100.

That score is higher than 25% of the 36,919 agencies Agency List has assessed so far.

The Agency List Score measures how well an agency documents its work in public: named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than to the client.

It does not measure client satisfaction, price, or availability.

How the Agency List Score is measured

Assessment date

Agency List assessed Leviathan Security Group in September 2026, reading 6 pages published on leviathansecurity.com.

The score reflects what Leviathan Security Group had published by that date; anything published since has not been read.

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