| Dakota SEO and Design: Offers web site design, search engine optimization and consulting. Based in North Dakota. |
| Datadial Ltd: Search engine registration and website ranking services. London, United Kingdom. |
| Datalink Service: Offers internet promotion, website marketing and offshore SEO services. Based in Kolkata, India. |
| Daup: Offers positioning and marketing services. Located in Borgosesia, Italy. |
| Deadlock Design: Creates meta tags and titles for designated pages, promotes them on search engines. Monthly maintenance and upkeep. |
| Decide Interactive: Internet promotion and affiliate marketing services. Cremorne, Australia. |
| Deep Channel Solutions Pvt Ltd: Consulting firm offering web design, development, marketing and programming. |
| Design 4 Dot Com, Inc.: Offers internet marketing campaigns to improve search engine placements. |
| Dgm: Provides search engine optimisation, marketing and banner advertising. Based in London, UK. |
| Digital Odyssey IT: Search engine optimization, positioning, directory placement and submission services. Seattle WA |
| Digital Road Consulting: Offers search engine optimization for small to medium sized businesses. Based in White River Junction, Vermont. |
| DigitalWork: Offers submission service and banner ad placement. Chicago, Illinois, United States. |
| Digitel Traffic: Offers search engine positioning and Internet marketing services for midsize to Fortune 500 companies. Hilton Head Island, South Carolina. |
| Direct: Search engine optimisation services with monthly maintenance contracts and site paid listings. |
| Direct Hits: Website promotion and ranking services, customized keyword, keyphrase development, search engine submissions and positioning. |
| Direct Traffic Ltd: Online marketing services to improve ranking and targeted traffic. |
| Disc: Offers website design, optimization and other forms of promotion. |
| DiTucci: Professional optimization and website promotion, offers a free search engine report. |
| DM Consulting: Canadian firm offers website design and optimizing services. |
| Dnpromoter: Offers web site marketing and promotion tools and services. |
| Domain Diffusion: Offers search engine positioning services and internet marketing. |
| Donpatterson-designs.com: Optimizing and designing web sites for traffic, conversions and profitability. |
| Dots and Coms: Offers search engine optimisation and Google Adwords campaign management service. |
| DR webdesign and optimization: Belgium based company provides search engine friendly website creation, website optimization and promotion. |
| DreamSubmit: Offers site submission services. |
| Dreamszsop: Provides web site optimization, monitoring and link submissions. |
| DSR1.com: Register and submit your website to over 400 search engines and directories. |
| DWP: Offers search engine placement through website optimization, link popularity and position reporting. |
| Dynamic Promotions: UK firm specializing in submission to all the major engines and directories. |
| The Driver Group: Specializing in web site marketing and promotion services. Located in Chester, New Jersey. |
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