Top 10 agencies

• Shutterstock images rating-4.29
• Fotolia rating-3.8
• Dreamstime rating-3.74
• Alamy rating-3.3
• iStockPhoto rating-3.17
• CanStockPhoto rating-3.11
• Getty Images rating-2.92
• ClusterShot rating-2.78
• Veer Marketplace rating-2.75
• Corbis rating-2.67