Strictly social media research companies—there are not a lot. Certainly, under 100 are social media research.
Then there are untold hundreds of other companies in the social media monitoring space. They're not members of any kind of research organization, no industry organizations, but they're doing similar kinds of things. They're counting, reading, and listening. Some of them are providing pieces of measurements, but they don't classify themselves as a market research company as mine is.