Aristi Limited

Based in the UK, Aristi Limited provides cyber security services focused on penetration testing and comprehensive solutions to protect client data, technology, and reputation. Aristi Limited specializes in cyber security solutions, with a headquarters in Birmingham, UK. Founded in 2008, the company has established a significant presence in the industry. The firm has completed one notable deal in December 2025 when it was acquired by Limerston Capital, enhancing its operational capabilities.

Aristi is a prominent provider of cyber security services, specializing in penetration testing and a range of complementary security solutions aimed at safeguarding client data, technology, and reputational integrity. Their core offerings include accredited penetration testing services, Information Assurance support, and training, which are designed to help organizations identify vulnerabilities in their cyber defenses. With over 15 years of experience, Aristi serves a diverse clientele in both the public and private sectors, including critical national infrastructure operators in energy and transport, healthcare organizations, and local councils. The company has established a solid reputation in the UK market and has expanded its services internationally, catering to clients looking to enhance their cyber resilience in various geographical locations.

Aristi generates revenue primarily through B2B transactions, offering subscription-based services and tailored security solutions to its clients. The company engages in long-term partnerships, providing ongoing support and consultancy in areas such as compliance and governance, in addition to its penetration testing services. Clients typically enter into contractual agreements, which may include fixed pricing for specific engagements or retainer models for continuous support. The transactions often involve comprehensive assessments, such as red teaming and IT health checks, with a focus on delivering value through actionable insights.

Notable services contributing to Aristi's revenue include their ISO 27001 consultancy and Cyber Essentials certification support, reflecting the growing demand for robust cyber security measures across various sectors. In December 2025, Limerston Capital acquired Aristi Limited, allowing for accelerated growth. The company plans to develop new products and services aimed at enhancing its cyber security offerings in strategic markets. Future efforts will include expanding operations into new geographic regions, although specific markets for this expansion have not been disclosed.

The resources from the acquisition will be directed towards these growth initiatives, enhancing Aristi's capabilities in delivering robust cyber security solutions.