Top 100 SEO Companies in the United States

WebFX is a performance-focused digital marketing agency with services designed to increase qualified leads, phone calls, and transactions for clients. Founded in 1996 and headquartered in Harrisburg, Penn., they have over 250 digital marketing, design, and development experts who serve customers through SEO, PPC, web design, and more. They also have partnerships with Google, Facebook, Bing, Salesforce, and more.

SocialSEO is a digital marketing agency that specializes in SEO, PPC, and social media. With three offices in Colorado – Denver, Colorado Springs, and Boulder – and a fourth office in Phoenix, SocialSEO and its team of nearly 70 employees has been committed to helping clients rank in search engines and market their brand since its founding in 1996.

Rankings.io is a legal SEO company located in O'Fallon, Ill. It was founded in 2013 and now has a team of nearly 20 that exclusively provides SEO services to clients. 

Ignite Visibility is one of the highest awarded digital marketing agency in the industry, specializing in digital marketing strategy, SEO, paid media, social media, email marketing, analytics, Amazon, and CRO. Ignite Visibility has used the same strategies they use for clients to become a four-time Inc. 5000 company (2017, 2018, 2019 and 2020). Ignite Visibility is led by leading industry expert John Lincoln, has over 110 full-time employees and offers a proprietary digital marketing forecasting system allowing clients to consistently hit quarterly goals.

Headquartered outside Los Angeles in Culver City, CA, Coalition Technologies specializes in SEO and PPC but also offers web design, e-commerce development, and WordPress development. With additional offices in Austin, TX and Seattle, WA, Coalition Technologies has grown to a team of 100+ since its founding in 2009.

SEO Werkz is a digital marketing firm in Draper, Utah, just outside of Salt Lake City. SEO Werkz has around 20 employees and helps clients with web design, content marketing, PPC, and social media marketing, in addition to SEO.

Zupo is an SEO consulting agency based in Anaheim, Calif. This company was founded in 2019 and has three employees. Zupo exclusively specializes in SEO services for small and medium-sized businesses.

Outerbox is a custom web design firm located in Akron, Ohio and serves clients nationwide. OuterBox was established in 2004 and has since grown to a team of 48 that provides SEO, web design, and e-commerce development services to companies of various sizes and industries.

A San Francisco, CA-based SEO services company, Victorious has been around since 2012. With a team of 25 employees, they deliver huge returns for their clients. They offer help clients with on-site and local search optimization, link building and content development.  

Big Leap is a digital marketing agency in Lehi, Utah. With over 13 years in the industry, Big Leap helps companies sustainably grow in organic reach and lead generation. They specialize in SEO marketing, content marketing, reputation management, social media marketing, conversion rate optimization, and marketing automation to match their clients’ needs. 

Logic Inbound is a digital marketing company based in Seattle. The company, founded in 2016, has a team of around 15 that provides SEO, PPC, and web design services. Logic Inbound serves enterprise and smaller-sized companies in the medical, business services, and e-commerce industries.

Sure Oak is a full-service SEO agency based in New York with a team of 30+ professionals. Founded in 2013, they offer comprehensive SEO services to companies ranging in size from small-business to enterprise-level clients from a wide variety of industries including business and financial services, B2B SaaS, e-commerce, insurance, education, healthcare, and non-profit. Their SEO services include business strategy, on-site optimization, link building, technical SEO, keyword research, and content development.
 

Titan Growth is a marketing and advertising firm based in San Diego, Calif. and founded in 2004. Titan Growth's team of about 45 employees primarily offers digital strategy services, although it also offers search engine optimization and pay per click services. 

SmartSites is a full-service digital agency located in Paramus, N.J. Founded in 2011, SmartSites has a team of nearly 100 designers, writers, developers, marketers, and problem solvers who work tirelessly to make websites successful. SmartSites offers its clients creative ways to build, plan, and promote their website. They focus on web design, PPC marketing, and organic SEO.

NextLeft, founded in 2016, is a digital content marketing and SEO agency. The company’s mission is to rid the world of digital clutter by creating the helpful, relevant content people are searching for online. Headquartered in sunny San Diego, NextLeft's team of 14 full-time SEO & Content Strategists amplify the world’s most loved brands.

Formed in 1997, Straight North is a full-service internet marketing company specializing in SEO, PPC, website design and development, email marketing, and graphic design. With 100+ full-time, in-house employees, they help B2B and B2C companies of all sizes generate sales leads and e-commerce revenue in the lucrative but highly competitive online marketing space. They offer a collaborative business style, technical expertise, deep experience in multiple verticals, team-based campaign execution, transparent reporting, and an unwavering focus on maximizing their clients' ROI.

Funnel Boost Media is a marketing and lead generation company based in San Antonio. The company, founded in 2012, has a team of more than ten that provides PPC, SEO, web design, and branding services. Funnel Boost Media serves small and midmarket companies in the legal; medical; supply chain, logistics, & transport; e-commerce, and financial services industries.

SEO services firm Outpace is based in Village, Oklahoma. The small company was established in 2020. Their team focuses on search engine optimization.

Content marketing company Stellar SEO is based in Spring Hill, Tennessee. The agency offers content marketing, digital strategy, pay per click, and search engine optimization and is small.The agency was established in 2012.

RevenueZen is a marketing firm founded in 2017 in Portland, Ore. with more than 10 employees. They excel at content marketing, marketing strategy, and SEO solutions for small and mid-market agencies in the fields of IT, advertising, and business services.

SEO agency 180 Marketing was launched in 2013. Their small team is headquartered in Bend, Oregon. Their services include search engine optimization.

Mimvi SEO is a marketing agency headquartered in New York that specializes in SEO, social media marketing and PR. Founded in 2015, the agency is comprised of fewer than 50 employees.

Digital Authority is a digital marketing agency. Established in 2016, the company is headquartered in Chicago, Illinois. Their services include SEO, PPC, Web Design, and Digital Marketing.

LawRank is a legal marketing agency based in Los Angeles, with additional offices in San Diego and New York. Founded in 2013, LawRank has four employees. This company offers SEO, PPC, and web design services for lawyers across the US.

321 Web Marketing is a digital marketing agency based in Fairfax, Va. The agency, founded in 2013, has a team of more than 15 that provides content marketing, web development, PPC, social media marketing, and email marketing services to small and larger-sized companies.

Firestarter SEO is a search engine optimization company based in Littleton, Colo. Founded in 2009, Firestarter SEO's small team of fewer than 10 specializes in SEO and PPC. Firestarter SEO primarily works with small businesses.Following the success of Firestarter SEO's SEO campaigns, the window company hired them to implement a PPC strategy.

W3 Affinity is a digital marketing agency based in Surry, Virginia, that was established in 2003. Their team of fewer than 10 employees offers SEO, digital strategy, and web design services.

High Voltage SEO is a marketing agency founded in 2014. Based in Berlin, Germany, their team of 5 employees specializes in SEO.
 

GR0 is a digital marketing agency founded in 2020 in Los Angeles with over 10 employees. They provide SEO solutions to various clients.

Founded in 2018, LinkGraph is a full-service digital marketing and design agency based in New York. Their team of 25+ specializes in SEO, content marketing, PPC, UX/UI design, and conversion optimization for mainly midmarket clients.