Search engine optimization used to be all about keywords. While keywords are still important, a good SEO company also has other tactics. One of the best features of a competitive SEO company is pay-per-click service. PPC service does not leave your online marketing to chance. Instead, with PPC, you purchase ad space on popular websites. The ads are often still targeted at a specific demographic, but the cost is tied to the number of people who click on the link. You can learn more about how your SEO strategy can incorporate this kind of marketing with the top PPC company. The companies below have been reviewed based on a wide range of qualitative and quantitative statistics. In some cases, variable listing fees effect position on this list; however only highly-regarded firms are accepted through our review analysis. Learn more about our ranking process here.