Introduction
OPSWAT releases quarterly market share reports for several sectors of the security industry. This report includes both worldwide and North American market share for antivirus software and Windows operating systems, as well as worldwide market share for instant messaging (IM) applications. The data used was collected between May 16, 2011 and May 15, 2012, and features comparisons across the two 6-month periods spanning these dates. Please note that OPSWAT is not a research institution; this report aims to distribute the unique data collected to inspire public discussion, not to make any claims as to why changes have occurred.
| AV Vendor | Market Share | Gain / Loss |
|---|
| Avast | 17.4% | 0.4% |
|---|
| Microsoft | 13.2% | 1.8% |
|---|
| ESET | 11.1% | 2.1% |
|---|
| Symantec | 10.3% | -0.3% |
|---|
| AVG | 10.1% | -1.8% |
|---|
| Avira | 9.6% | -0.9% |
|---|
| Kaspersky | 6.7% | 0.0% |
|---|
| McAfee | 4.9% | -0.4% |
|---|
| Panda | 2.9% | 0.0% |
|---|
| Trend Micro | 2.8% | 0.4% |
|---|
| other | 11.1% | -1.2% |
|---|
