A vendor in interior design is a company or individual who provides products and services related to the field of interior design. They can provide furniture, fabrics, window treatments, lighting fixtures, artwork and accessories that are used to create an aesthetically pleasing space. Vendors may also offer professional consultation services such as project management, installation assistance and product recommendations. Additionally, they may be able to help with budgeting for projects by providing cost estimates for materials and labor costs associated with each job.