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Aristi

CHECK and CREST-accredited Birmingham-based cyber security consultancy with over 15 years of experience delivering penetration testing, red teaming, and OT security assessments for government and private sector clients.

Featured in: Best CREST Pen Testing Companies

Founded
2008
Team Size
11-50
Geography
National
Markets
UK
Last verified: Feb 2026

About

Aristi is a Birmingham, West Midlands-headquartered penetration testing and cyber security consultancy founded in 2008, with dual CHECK and CREST accreditations. With over 15 years of experience supporting clients across both public and private sectors, all of their cyber security testers are full-time UK-based employees who hold SC and NPPV3 security clearance, enabling them to work on the most sensitive government and critical national infrastructure projects.

Aristi's penetration testing services include CREST and CHECK penetration testing, red team assessments, vulnerability assessments, cloud security assessments, web application and API testing, mobile application testing, phishing assessments, physical security assessments, configuration reviews, OT penetration testing, PSN/PSNP IT health checks, and Cyber Essentials certification.

The company serves an impressive range of sectors including police, energy and critical national infrastructure, legal, rail, fire services, banking and finance, NHS, IT providers, manufacturing, housing and construction, private healthcare, and central and local government. The firm holds ISO 27001 and ISO 9001 certifications.

Methodologies

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