The US digital advertising market is highly consolidated, with a few major companies—primarily Google and Facebook—dominating the landscape with significant market share from 2015 to 2025. Google holds the largest share at 28.0%, closely followed by the collective category of Others at 27.7%, demonstrating that while the market is concentrated, a sizable portion remains distributed among smaller players. Facebook secures the third-largest share at 22.5%. Together, Google and Facebook account for over half of the market among individual companies. Amazon holds a notable 12.0% share, indicating its growing influence. The remaining companies hold much smaller portions, with Microsoft at 4.5%, Verizon at 3.0%, Snapchat at 1.2%, and Twitter at 1.1%.
| Labels | Market Share 2015-2025 (%) |
| 28.0 | |
| Others | 27.7 |
| 22.5 | |
| Amazon | 12.0 |
| Microsoft | 4.5 |
| Verizon | 3.0 |
| Snapchat | 1.2 |
| 1.1 |
