Antivirus software for PC is a type of software used to eliminate computer threats such as viruses, trojans, and malicious software.

Antivirus software usually integrates functions such as monitoring and identification, virus scanning and clearing, automatic upgrades, and active defense. Some antivirus software also has functions such as data recovery, preventing hacker intrusion, and network traffic control. It is an important component of computer defense systems (including antivirus software, firewalls, Trojan and malware killing programs, intrusion prevention systems, etc.).

The Antivirus software for PC market is a key part of the information security field, and with the popularization of the Internet and the increase of network attacks, the market prospects are becoming increasingly broad. At present, the global market size of antivirus software for PC has reached billions of dollars. From the perspective of market development in sub-regions of Southeast Asia, the market size of antivirus software for PC in Southeast Asia is expected to reach $179.81 million in 2023, among which the market share of non-free antivirus software will reach 81.18%, while the market share of free open source antivirus software is only 18.82%.

From the perspective of market competition pattern, the concentration of antivirus software for PC market in Southeast Asia is relatively high. Data shows that the total revenue of the top 3 enterprise antivirus software for PC market in the industry was $55.48 million in 2020, accounting for 38.60% of the market. The total revenue of the top 6 enterprises was $93.75 million, with a total market share of 65.23%. The top three companies in the rankings were ESET Antivirus, Norton AntiVirus, and Bitdefender Antivirus, with market shares of 13.06%, 12.98%, and 12.57%, respectively.

Southeast Asia Antivirus Software for PC Market Revenue and Share by Enterprise in 2020

Enterprises	Market Revenue(M USD)	Market Share
ESET Antivirus	18.77	13.06%
Norton AntiVirus	18.65	12.98%
Bitdefender Antivirus	18.06	12.57%
Top3	55.48	38.60%
Top6	93.75	65.23%