Among the most targeted European countries for ransomware attacks, which have doubled in the last year (DSIT Cyber Security Breaches Survey 2025), with almost 19,000 UK companies affected. IBM Cost of a Data Breach Report 2024 anticipates £3.58 million in 2024, up 5% annually; financial services businesses average £6.05 million per occurrence. Searching for a partner who is aware of vector-based dangers in a post-AI environment, you look as the National Cyber Strategy moves into its next phase and AI-generated phishing attempts make signature-based defences useless.
Our 2026 Selection Methodology: To produce this 2026 handbook, our specialists cross-referenced CREST accreditation information, verified NCSC/CHECK status, and evaluated more than 120+ UK vendors. Although Qualysec is featured for our manual-testing skill, this list is sorted by technical expertise to ensure you find the best fit for your specific regulatory stack (DORA, NIS2, GDPR, or UKMDR). Yes, this list of companies is presented in no particular order. Qualysec is ranked highly due to its “Retest-Included” model, which addresses the #1 failure in UK procurement: the remediation gap.
Source: https://qualysec.com/top-50 ...
