Big data and the marketing world go together like peanut butter and jelly. Marketers want to present their brands in the most-effective manner possible and always put the right ad in front of the right person. In theory, big data makes that possible at a whole new level.

Today’s analytic techniques and technologies can tell marketers not only what campaigns are working, but also where to spend next and — in some cases — the very language to use on their web sites. Here are five companies you’ll likely be hearing a lot more about if you’re not already a user.