TeamT5 is a cybersecurity company founded in 2017 by five security professionals in Taiwan. The company specializes in cyber threat intelligence research focused on the Asia-Pacific region, with particular expertise in Advanced Persistent Threat (APT) attacks and ransomware. The company's core team consists of analysts with over 20 years of experience in malware research and APT investigation. TeamT5 leverages geographic and cultural advantages, including language capabilities, to analyze and track cyber attackers operating in the Asia-Pacific region, particularly those originating from China. TeamT5 offers threat intelligence reports and anti-ransomware solutions through their flagship product ThreatSonar, which provides endpoint threat hunting and detection capabilities. The platform uses proactive threat hunting techniques to identify and respond to cyber espionage and ransomware attacks. The company serves clients across the United States, Japan, Taiwan, and other Asia-Pacific countries. Their customer base includes government agencies, financial institutions, telecommunications operators, technology companies, electronic manufacturing service providers, and managed security service providers (MSSPs). TeamT5 maintains research teams including threat intelligence analysts, Engine Lab for reverse engineering and kernel analysis, D39 for vulnerability research, and an incident response team. The company has received Series A funding from Japanese investors including JAFCO Asia, ITOCHU, and MACNICA in 2022, and has established a subsidiary office in Japan. The company regularly presents research findings at international cybersecurity conferences including Black Hat, Code Blue, AVTokyo, Troopers, Hack In The Box, and FIRST. TeamT5 has received recognition from Frost & Sullivan as Taiwanese Threat Intelligence Company of the Year in 2023 and 2024.