Red4Sec

Founded in 2017, Red4Sec is a cybersecurity company based in Madrid, Spain working in offensive security, penetration testing, application security +2 more.

Red4Sec is a cybersecurity company specialising in offensive security, penetration testing, AI security and LLM auditing, Web3 and smart contract security, and assessments of critical environments. Its services include network and infrastructure pentesting, web and mobile application security audits, source code reviews, AI and LLM security assessments against prompt injection and data leakage, continuous attack simulation, and smart contract and DeFi protocol auditing. The company positions itself as a trusted partner for organisations needing advanced security capabilities, with a technical approach focused on real-world risk. The team is made up of security researchers and ethical hackers, and the company reports more than 10 years of experience. Based in Madrid, Spain.