K9-Data is an online resource owned by Greyhound-Data Limited, created to provide information about sighthounds from around the world. Its breed-focused database includes pedigree records for dogs across a wide range of sighthound breeds, from Afghan Hounds and Borzois to Salukis and Whippets. Users can explore breed listings and access information such as race results, supporting research into dogs and their lineages.

The site also offers a forum, test mating tools with statistics, and a classified section featuring recent matings and puppies that have been whelped. When a dog is added to K9-Data, it receives its own webpage, giving its information a dedicated place on the site. Paid membership applies across the breeds listed on K9-Data, with Greyhounds excluded because Greyhound-Data operates as a separate, standalone website.

By bringing breed records, performance information, community discussion, and breeding-related resources together, K9-Data serves people seeking to learn about and follow sighthounds internationally