SecuLetter is a South Korean cybersecurity company that specializes in file and email security solutions. The company develops technology to detect and neutralize threats in digital content, including malicious code and attachments, using hybrid analysis techniques that combine static and dynamic analysis methods. Their product portfolio includes MARS (Malware Analysis and Response System), which provides content disarm and reconstruction (CDR) capabilities, and DISARM, a zero-trust email security service available on Microsoft Marketplace and AWS Marketplace. The company also offers SLE/SLF solutions and Email Security Cloud services. SecuLetter serves enterprise customers across multiple sectors and has expanded internationally, particularly in Southeast Asia and the Middle East, with partnerships in Saudi Arabia, Thailand, and Malaysia. The company has obtained CC certification from the IT Certification Office and ISO/IEC 27001:2013 certification for information security management. Founded in 2015, SecuLetter went public on the KOSDAQ market in 2023 through a technology special listing. The company has received recognition from the Korean government, including selection as a 'Global ICT Future Unicorn' by the Ministry of Science and ICT and awards on Information Security Day.