Primis is the leader in the online video landscape. Their Video Discovery platform increases publishers' revenue by helping users discover high-quality video content. The company's technology is used by 100s of digital publishers, empowering over 450M uniques with an engagement-based video experience. In May 2021, Primis launched Sellers.guide, a free resource to shed light on the ad tech supply chain by comparing ads.txt files with sellers.json.