| CA-NZ: New Zealand-based firm offers a site review, written action plan, search engine optimisation, submission and positioning monitoring services. |
| Calvi Francesco: a SEO agency offering search engine submission and positioning, pay per click advertising, webmarketing consulting. |
| Canadian Search Engine Marketing: Provides campaign management and consulting services. Based in Scarborough, Ontario, Canada. |
| Captain Travel: Offers pay-per-click marketing as well as meta tag optimization and submission services for the travel industry. Based in Victoria, British Columbia, Canada. |
| Captiva Marketing: Services include optimizing, submission and pay-per-click programs. Based in St. Louis, Missouri, United States. |
| Capture Commerce: Specializes in website marketing, search engine optimization and keyword selection. Located in Snellville, Georgia, United States. |
| Cat Interactive: Provides e-mail marketing, optimization, maintenance and support services. Based in Las Vegas, Nevada, United States. |
| Cattledriver.com: Offers search engine submissions, pay for hits and email marketing programs. |
| CCS Search Marketing: Search engine optimization, page ranking and site positioning are the tools that increase a websites search engine hit traffic. |
| CEOwebsites: Search engine optimization services geared toward businesses and CEOs. Based out of Boca Raton, Florida, United States. |
| Cheap Web Design - Chris Smith: Offers search engine promotion and optimisation services, page design and keyword analysis, reporting on rankings and site submission. |
| Cheasyy Solution: Outsource company specialist in search engine marketing, web site design and lead generation. |
| Cheekycowmedia.co.uk: Search engine optimisation and online business development for small businesses. |
| Chillizone.com: UK-based firm offers several marketing techniques including search engine optimisation, submittal and position monitoring. |
| China Internet Marketing: Search engine submission for China, as well as design and translation services. Based in Shanghai, China. |
| Chinese Search Engine: Offers optimizing tips and submission services for the Chinese market. Located in Yunnan, Peoples Republic of China. |
| Choice Positions: UK-based firm offers site analysis, keyword research and recommendations, homepage optimisation and submission plans. |
| Citynet Web: Specializes in website marketing and search engine optimization services. |
| ClaudiaDot Search Engine Marketing: Offers website optimizing and submission services. Located in Rio Rancho, New Mexico, United States. |
| Clever Marketing Spain: Search engine optimization and internet marketing firm based in Spain. |
| Clickthrough: Providing website marketing consultancy. Located in Watnall, Nottingham, United Kingdom. |
| Clixplus.com: Provides search engine position and maintenance services. |
| CM SEO & Consulting, LLC: Search engine optimizer and consulting services. Based in Torrance, California, United States. |
| Coastal Sites: Offers positioning services and pay per click management. Pagosa Springs, Colorado, United States. |
| Coddo.net: Offering articles, site submission and optimizing services. Locations in India and the United States. |
| Cogentis Internet Services: Offers search engine marketing services including keyword research, website optimisation, pay per click management and traffic analysis. Located in New South Wales, Australia. |
| Complete Online Marketing Solutions LLC: A full service consulting, online marketing and technology solutions company. |
| Compucall: Provides website optimizing and positioning. Located in Ramat Gan, Israel. |
| Computer Construction Company: Offer search engine submissions and optimizing services. Based in Norcross, Georgia, USA. |
| Comwerks: A Singapore based agency providing web design, multimedia, e-marketing and search engine optimization services. |
| ConnectedMarkets: Provides search engine optimization, pay-per-click marketing and link building services. Located in Los Angeles, California, United States. |
| Convonix, Inc.: Offers web marketing services including search engine optimization, PPC, web analytics and search engine marketing services. |
| Corporate Web Services: London-based firm offers ecommerce solutions, search engine optimisation, link building strategies, submission services and software. |
| Cougar Consulting: Offers website submission and page optimizing services. |
| CrackMarketing.com: Provides optimization, branding, marketing and design. Based in Richmond, British Columbia, Canada. |
| Craft Site Medic: Offers advertising and website promotion for sites in the arts and crafts industry. |
| Cranial Interactive Media: Firm specializing in search engine optimization, marketing, alternative search optimization, and PR optimization. Located in Edmonton, Alberta, Canada. |
| Cre8pc: Provides website optimizing, marketing and quality assurance testing. |
| CreativConcepts: Pennsylvania search engine optimization company provides web design and pay-per-click campaign management services. |
| Cresoft Corporation: Internet consulting, marketing, web design, development and search engine optimization. |
| Crystal Clear Computing: Website optimizing and internet marketing consultancy. Located in Wrexham, United Kinddom. |
| Custom PPC Management: Provides campaign management for Google Adwords and Yahoo search marketing campaigns and search engine optimization services. |
| Customer Magnetism: Provides search engine positioning and pay-per-click management services. Located in Virginia Beach, Virginia, United States. |
| Cyberdias: Search engine optimization services provided for websites in Greece and USA. |
| CyberHospitality.com: Provides internet marketing services for the hospitality industry. Elkhorn, Nebraska, United States. |
| Cybermight: Web site design and marketing web services. |
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