Universal Engine
- Multi-Lingual search engine marketing services, optimization and PPC management services.
- http://www.universalengine.com

USA Marketing Associates
- Provider of pay-per-click, optimization, meta tag, content geneation and other search engine marketing services.
- http://www.usamarketingassociates.com

Ultimateweb Ltd
- Providing web site creation and search engine promotion service.
- http://www.ultimateweb.co.uk/

Unique Search Engine Optimization
- Provides web design, search engine optimization, linking, content editing, consulting and training services, pay-per-click marketing solutions.
- http://www.uniseo.com/

Unlimited Exposure
- A Toronto based marketing firm offering web site hosting, search engine optimization and submission.
- http://www.unlimitedexposure.com/

USWeb
- Agency specializing in internet marketing services like search engine optimization, contextual marketing and website design.
- http://www.usweb.com/

UpWord Search Marketing
- Specializes in long-term search engine optimization solutions and pay for click management.
- http://www.upwordsem.com/

Unlimited SEO
- Search engine optimization, pay per click bid management, copywriting, ranking and site traffic reports.
- http://www.unlimitedseo.com/

Uwel.com
- Provides customized search engine marketing for small businesses and real estate professionals.
- http://www.uwel.com/

Ultimate Site Promotion
- Offers submittal, link popularity, and reporting services. Los Angeles, California.
- http://www.ultimatesitepromotion.com/