Brilig is free to use

Brilig provides an open, transparent and structured environment for the listing, combination, analysis and buying or selling of audience information for online advertising targeting. Data sellers gain the ability to sell their data alone or...

Lookery offers both free and paid options

Lookery provides demographic marketing services in and around social networks, trying to solve the basic economic problem that social networks face: great user profiling but unpredictable ad inventory. The service makes it safe for social n...