Top 100 SEO Companies in the United States

Thrive is a design agency founded in 2002 with a team of 2. Based in Seattle, Wash., the agency lends its web design, SEO, and web development expertise to small and midmarket firms alike. Their SEO services focus on local searches, on-site optimization, and reputation management. They specialize in PHP and WordPress.

In Coppell, Texas, Connect Media Agency is a web design agency. They focus on web design, search engine optimization, pay per click, logo, and more and were established in 2012.

Founded in 2001, Walker Sands is a full-service B2B marketing agency dedicated to each client's unique goals.  From their offices in Chicago, San Francisco, Seattle, Boston or Atlanta,  Walker Sands' team of 170+ has various areas of expertise, including SEO, PPC, content marketing, and strategy. They also help clients with public relations, demand generation, branding, creative and marketing strategy.

Digital marketing agency Arc Intermedia is headquartered right outside Philadelphia. Founded in 2010, Arc Intermedia and its team of about 10 employees helps B2B and B2C clients in the U.S. and UK acquire customers. They not only specialize in SEO but also have experience with PPC, content marketing, web design, and digital strategy.

ZINC Digital of Miami is a digital marketing agency based in Miami. Since 2018, their small team has been specializing in SEO, web design, branding, market research, and more for a variety of clients. 

Runningfish Web Design & Digital Marketing is an SEO firm based in San Diego, Calif. Founded in 2003, their team of 7 serves clients in the hospitality, legal, and utility sectors. Services include social media marketing and web design.

Coastal Web Solutions, a small web design company, is headquartered in Oceanside, California. They specialize in web design, web development, e-commerce development, mobile app development, and more and were established in 2022.

Firestorm SEM is an SEO and PPC agency located in Philadelphia. Founded in 2008, Firestorm SEM works with clients across industries, including pharmaceutical, e-commerce, financial, and education. Named a Google All Star by Google, Firestorm SEM and its small team of fewer than 10 employees offers SEO, PPC, digital strategy, branding, and social media

SeedX Inc. is an award-winning digital marketing and growth agency headquartered in Los Angeles and Austin. They were founded in 2015, and the team of 45 specializes in omnichannel marketing, paid media, and scalable growth strategy. They primarily focus on e-commerce, technology, and multi-faceted campaigns and growth projects.

Knock Knock Digital is a digital firm founded in 2020 with no more than 10 experts. They offer web design, SEO, and PPC solutions from their office in Windsor, Conn. They mainly work with small and mid-market businesses in the industry of advertising.

Labyrinth Brand Co is a Plano, Texas-based SEO agency. The small team offers search engine optimization, branding, and public relations. The company was founded in 2023.

Moral SEO is an SEO agency founded in 2019 with no more than 50 employees. They provide SEO solutions from their office in Sheridan, Wyo. They work with clients in the industries of e-commerce, dental, and business services.

Grounds for Promotion is an advertising company headquartered in Boulder, Colorado. Established in 2012, the small team specializes in advertising, digital strategy, marketing strategy, media planning & buying, and more.

Core and More Technologies is a pay per click company. Established in 2010, the team offers pay per click, search engine optimization, social media marketing, web design, and more. Their small agency is headquartered in Ocean Grove, New Jersey.

Vale Creative , a SEO company, is in Crozet, Virginia. The small company was established in 2019. Their services include search engine optimization, digital strategy, content marketing, and pay per click.

Founded in 2005, Go Fish Digital is a marketing and advertising agency that offers SEO, content marketing, and PPC services to their enterprise, mid-market, and small business clients in the education, hospitality, and business services industries. Their 50 employees are based out of offices in Raleigh, N.C. 

Bizango is a web design and online marketing agency that services smack and midmarket businesses. In addition to design, their services include SEO, pay per click, and social media management. Established in 2006 in Seattle, their team is comprised of about 10 people.

Zealth Digital Marketing is a digital marketing agency based in Roselle, Ill. Founded in 2012, they have 4 employees that serve small businesses in the financial services, education, and healthcare industries. Services include web design and development, SEO, and social media marketing.

Creative Web Designs is a web agency based in San Antonio with fewer than 10 members. Founded in 2010, they offer web design, PPC, and SEO solutions for small and mid-market firms that work in the fields of business services, consumer products, and health care.

Brenton Way is a digital marketing agency based in Woodland Hills, Calif. Founded in 2017, Brenton Way's team of 7 employees provides a variety of different services such as SEO, PPC, social media marketing, and PR.

Main Street ROI is a digital marketing agency located in New York. Founded in 2010 and with over 20 members on staff, Main Street ROI offers SEO, PPC, and web design services, helping small businesses create successful digital marketing campaigns.

1Digital Agency is a digital marketing agency that was founded in 2012. Their head office is located in Philadelphia and they have another office in Quebec, Canada, totaling 28 employees. They are primarily focused on e-commerce solutions, utilizing BigCommerce, Shopify Plus, Magento, CPC, SEO and email marketing to optimize mid-market businesses.

Rotate Digital is a SEO services firm. They focus on search engine optimization, web development, and other digital marketing and were founded in 2017. Their small team is Mesa, Arizona-based.

Plaudit Design is a full-service digital agency that was founded in 1998. With offices in both Saint Paul, Minn. and New York, Plaudit Design has a team of 12 employees that specializes in web design and development, digital strategy, and SEO. 

Avidon Marketing Group is a SEO firm based in West Hollywood, Calif. Founded in 2018, their team of 8 serves clients in the legal cannabis and business services sectors. Services include content marketing and PPC.

SEO services firm Agency Elevation is headquartered in Neenah, Wisconsin. The small team specializes in search engine optimization, social media marketing, pay per click, and digital strategy and was launched in 2012.

Conversion optimization company My Creative Mark was launched in 2014. They are headquartered in Pasadena, California and have a small team. Their services include conversion optimization, digital strategy, search engine optimization, web design, and more.

Founded in 2013, Evestar is a Conversion Optimization company. Headquartered in Fort Lauderdale, Florida, their midsize team provides Conversion Optimization, E-Commerce Development, Social Media Marketing, Email Marketing, and more.

CSTMR is a digital marketing firm that is located in Austin, Texas. The team of about 6 employees has been specializing in web design and development since the firm was founded in 2014. CSTMR also offers UI/UX design services to its clients.  

Unicorn DV, an e-commerce development firm, is headquartered in New York, New York. They offer e-commerce development, search engine optimization, ecommerce marketing, and web development and were launched in 2020.