Datacolor are an American colour management company. We generally regard them as the more consumer focussed alternative to X-Rite. They do a lot in terms of marketing, but it would be fair to say over the last 15 years we've found X-Rite to be a more consistent and reliable brand.
Here's their own blurb:
Datacolor, a global leader in color management solutions, provides software, instruments and services to assure accurate color of materials, products and images. The world’s leading brands, manufacturers and creative professionals have used Datacolor’s innovative solutions to consistently achieve the right colour for more than 40 years.
Datacolor provides sales, service and support in over 65 countries throughout Europe, the Americas and Asia. This has given the company an intimate understanding of its core markets and how they depend on colour, allowing Datacolor to provide cost-effective solutions to manage colour globally throughout its customers’ workflows – enabling them to realise their vision, save time, improve quality, reduce costs, and excite their customers. Industries served include textile and apparel, paint and coatings, automotive, plastics, microscopy, photography, videography, digital imaging, home theatre, ink, printing, paper, leather and others.
Founded in 1970 and headquartered in Lawrenceville, NJ, USA, Datacolor is a global leader in color management and color communications technology. Datacolor initially developed solutions for industrial color challenges, and then expanded its product offering to include color communication and digital imaging solutions.