33Across, a startup at the intersection of social and big data launched in 2008, has raised an additional $13.1 million in venture capital its third round of funding. The latest cash infusion brings 33Across’ total funding to slightly over $26 million. The company, which uses social data from 1.25 billion users across the globe to help its clients target their advertising efforts, has at least doubled its revenue annually since its founding and claims to have the largest social data graph in existence since it acquired content tracker Tynt Multimedia in January.

The company claims its client roster includes more than 375 Fortune 1000 brands and the 600,000 publishers where the brands’ ads are displayed. 33Across intends to use the funding for engineering, infrastructure, new products and hiring more staff. 33Across has offices in 11 cities and 86 employees, but with the new capital could double its size next year. According to the company’s CEO Eric Wheeler, there also may be more acquisitions in 33Across’ future. This may sound aggressive, but publishers are clamoring to maximize their ad revenue as they compete with giants like Google and Facebook for business – something 33Accross claims as a specialty.

33Across uses constantly updated graphs of a brand’s social connections to determine the best targets for ads in real-time using a sophisticated Hadoop implementation, machine learning and proprietary predictive-analytics algorithms. The company has said it processes over 40,000 transactions per second; it collects and analyzes more than a terabyte of data per day. 33Across’ business is a poster child for the types of possibilities created by big data. The company’s technology gathers data that helps brands deliver targeted marketing messages within hours, instead of in days and weeks like traditional methods such as surveys. This is a big benefit given the size and speed of impact social interactions can have on a brand.

The company wants to be able to track consumers’ affinity for a brand no matter how it is expressed. 33Across has enhanced the content tracking technology is gained with the Tynt acquisition. The company’s first round products including the technology is being released in coming weeks. However, achieving the broader vision, is part of its longer term plans. 33Across should stay focused; there have been some signs Facebook may extend its advertising offerings beyond its own site. Google could also break into the market, but for now, 33Across can celebrate its success and figure out what to do with its new cash.