ZEFR is a technology company that provides contextual targeting solutions for brands. The company's platform offers a suite of software tools that enable brands to identify and target their desired audiences on YouTube and other social media platforms. ZEFR's technology uses machine learning algorithms to analyze video content and identify relevant keywords and topics, which can then be used to target specific audiences with relevant ads. The company was founded in 2009 and is headquartered in Burbank, California.