A decade of singular focus
on content security
Listed on KOSDAQ. 100+ enterprise and public-sector customers. 100% detection in independent KISA testing. Named a Representative Vendor in the Gartner CDR Market Guide.
SecuLetter founded — a reverse engineering–based content security specialist with a singular focus on non-executable file threats.
MARS engine released — proprietary engine that disassembles and analyzes file structure at the binary level, without ever executing the file.
First public-sector deployment — file security gateway deployed in a government cross-domain environment, establishing our public-sector practice.
KISA (Korea Internet & Security Agency) 100% malware detection — the only non-executable file analysis solution to achieve a perfect score in the official KISA evaluation.
TTA GS Grade 1 certification — top-tier software quality grade, validated against 200,000 real-world files.
Named a Representative Vendor in the Gartner CDR Market Guide — the only Korea-headquartered company among 40 vendors recognized globally.
Listed on KOSDAQ — public listing reflecting sustained technology-led growth and market trust.
100+ organizations protected — Ministry of Science and ICT, National Health Insurance Service, National Pension Service, KB Securities, Korea Investment & Securities, and other public-sector, financial, and enterprise customers.
Category leader in content security — defining and shaping the CDR (Content Disarm and Reconstruction) category, with the largest CDR patent portfolio in Korea.
The Value, Beyond Security
Trust
Independently validated by KISA (100% detection), TTA GS Grade 1, and Common Criteria certification. A security partner trusted in daily operations by 100+ organizations — including three Korean ministries and major public bodies such as the National Health Insurance Service and National Pension Service — and reinforced by consistently high annual renewal rates across the customer base.
Fast
12-second analysis. 34 ms sanitization. No perceptible impact on the workflow. Engineered to handle 310,000+ files per day, with proven throughput in high-volume environments that exchange more than 100,000 files daily — processed in real time with no queue backlog, preserving business continuity.
Innovate
Defining the CDR category with the reverse engineering–based MARS engine. The largest CDR patent portfolio in Korea, with international recognition from Gartner. MARS identifies zero-day and variant threats — including structural exploits in fonts and tables — without signatures; CDR then strips the malicious elements and safely reconstructs the file.
Connect
A partner-led go-to-market built on complement, not replacement. SecuLetter sits alongside existing firewalls, EDR, and email security to add specialized non-executable file protection, expanding partner portfolios and creating new revenue without disrupting customer infrastructure.
Visit us
SecuLetter HQ
14F Pangyo Innovation Lab, 11 Geumto-ro 80beon-gil,
Sujeong-gu, Seongnam-si, Gyeonggi-do, Republic of Korea
Email: global@seculetter.com