Top 10 agencies

• Shutterstock images rating-4.4
• Fotolia rating-4.09
• Mostphotos rating-4
• Dreamstime rating-3.79
• Alamy rating-3.52
• iStockPhoto rating-3.37
• ClusterShot rating-3.29
• Getty Images rating-3.27
• Corbis rating-3
• Age Photostock rating-3