In my opinion, if it is a small organization looking for outsourcing, then it should go for smaller vendors to cut down on the cost and to maintain flexibility rather than going for larger players as they may not provide that much attention to a smaller client. Secondly, if the requirement of the company is niche that can be met only by an industry specialist, then they need to go for a smaller specialised provider who have the relevant experience in providing those deliverables and can do that in the given timeline.