Top 15 Largest SEO Companies in the USA 2024
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As businesses work to strengthen their digital presence, search engine optimization (SEO) has become an essential tool for growth. Whether you're looking to improve your website’s ranking, attract organic traffic, or increase leads and conversions, finding the right SEO partner can make all the difference. With a variety of SEO companies in the USA offering services from technical SEO to local SEO services, it’s important to choose one that aligns with your business’s unique needs.
In this blog, we highlight the largest SEO companies in the USA for 2024, focusing on those that provide comprehensive solutions for B2B industrial and manufacturing businesses. Whether you need SEO services in the USA or localized strategies, this list will help guide your search for the right SEO partner.
Top 15 Largest SEO Companies in the USA 2024
| Rank | Company Name | Revenue | Established | Headquarters | Notable Services | Reason for Ranking |
|---|---|---|---|---|---|---|
| 1 | Coalition Technologies | $130M | 2009 | Los Angeles, CA | Ecommerce SEO, Technical SEO, Local SEO | High revenue and expertise in ecommerce SEO, serving a wide range of industries. |
| 2 | WebFX | $120M | 1996 | Harrisburg, PA | Technical SEO, Content Marketing, Local SEO | Proven track record and data-driven approach for B2B manufacturing and other sectors. |
| 3 | Thrive Internet Marketing | $110M | 2005 | Arlington, TX | Website Structure Optimization, Local SEO | Tailored SEO solutions and an emphasis on B2B markets. |
| 4 | OuterBox | $105M | 2004 | Akron, OH | Ecommerce SEO, Technical SEO, Local SEO | Specializes in ecommerce and industrial SEO, providing strong local and national strategies. |
| 5 | MacRAE'S | $10M | 1991 | Mississauga, ON | B2B SEO, Web Design, Local SEO | Specializes in B2B and industrial SEO for manufacturing, engineering, and other fields. |
| 6 | SEO Inc. | $100M | 1997 | Carlsbad, CA | Technical SEO, On-Page Optimization, Local SEO | Over 20 years of experience with a strong focus on B2B SEO. |
| 7 | Victorious | $98M | 2012 | San Francisco, CA | SEO Audits, On-Page Optimization, Local SEO | Data-driven approach tailored for long-term B2B success. |
| 8 | SmartSites | $95M | 2011 | Paramus, NJ | Technical SEO, Keyword Research, Local SEO | Strong focus on B2B and manufacturing SEO services. |
| 9 | Ignite Visibility | $90M | 2013 | San Diego, CA | On-Page Optimization, Content Marketing, Local SEO | Comprehensive services for B2B and industrial companies. |
| 10 | 1Digital Agency | $85M | 2012 | Philadelphia, PA | Technical SEO, Keyword Targeting, Local SEO | Specializes in ecommerce SEO and B2B strategies. |
| 11 | Straight North | $80M | 1997 | Chicago, IL | Lead Generation, Content Optimization, Local SEO | Focuses on lead generation and technical SEO for B2B clients. |
| 12 | Directive | $78M | 2014 | Irvine, CA | Performance-Driven SEO, On-Page Optimization, Local SEO | Known for performance-driven SEO strategies and delivering measurable outcomes. |
| 13 | Boostability | $70M | 2009 | Lehi, UT | Affordable SEO, Technical SEO, Local SEO | Affordable SEO services for small and medium businesses. |
| 14 | Big Leap | $68M | 2008 | Lehi, UT | Technical SEO, Keyword Research, Local SEO | Transparent SEO strategies with a focus on B2B clients. |
| 15 | Mabbly | $65M | 2013 | Chicago, IL | Full-Service SEO, Content Marketing, Local SEO | Customized full-service SEO solutions for long-term success. |
1. Coalition Technologies
Revenue: $130M
Established: 2009
Headquarters: Los Angeles, CA
Notable Services: Ecommerce SEO, Technical SEO, Local SEO
Reason for Ranking: High revenue and expertise in ecommerce SEO, serving a wide range of industries.
Coalition Technologies is a prominent SEO agency offering a wide range of services for both ecommerce and B2B clients. From content optimization and keyword targeting to technical SEO, they provide solutions that help businesses improve visibility and grow online. For companies targeting local markets, their local SEO services are particularly effective in helping businesses connect with customers in specific regions.2. WebFX
Revenue: $120M
Established: 1996
Headquarters: Harrisburg, PA
Notable Services: Technical SEO, Content Marketing, Local SEO
Reason for Ranking: Proven track record and data-driven approach, with a focus on B2B manufacturing and other sectors.
WebFX is known for its data-driven approach to SEO, which serves a wide range of industries, including B2B manufacturing companies. WebFX focuses on improving search engine rankings, driving traffic, and increasing conversions. Their advanced SEO techniques include content marketing, technical SEO, and local SEO services to ensure clients remain competitive. With a proven track record of delivering strong results, WebFX is one of the largest SEO companies in the USA.3. Thrive Internet Marketing
Revenue: $110M
Established: 2005
Headquarters: Arlington, TX
Notable Services: Website Structure Optimization, Local SEO
Reason for Ranking: Tailored SEO solutions and an emphasis on B2B markets.
Thrive offers tailored SEO solutions for B2B companies looking to enhance their online presence. They focus on optimizing website structure to ensure it performs well in search engine rankings while also being user-friendly. Thrive also provides local SEO services, which help businesses attract customers in specific geographic areas. With years of experience in SEO services in the USA, Thrive consistently delivers measurable results for its clients.4. OuterBox
Revenue: $105M
Established: 2004
Headquarters: Akron, OH
Notable Services: Ecommerce SEO, Technical SEO, Local SEO
Reason for Ranking: Specializes in ecommerce and industrial SEO, providing strong local and national strategies.
OuterBox specializes in SEO solutions for both ecommerce and industrial companies. Their services include technical SEO, content optimization, and local search strategies, making them one of the preferred SEO companies in the USA for businesses seeking to grow their digital presence. OuterBox’s local SEO services help businesses attract customers within their target regions, making their strategies highly effective for localized markets.5. MacRAE'S
Revenue: $10M
Established: 1991
Headquarters: Mississauga, ON
Notable Services: B2B SEO, Web Design, Local SEO
Reason for Ranking: Specializes in B2B and industrial SEO.
MacRAE'S is a trusted provider of SEO services, specializing in helping industrial and B2B companies across the US and Canada. With a deep understanding of the industrial sector, MacRAE'S tailors its SEO strategies to meet the needs of businesses in manufacturing, engineering, and other industrial fields. Their services include everything from keyword research and on-page optimization to local SEO services that ensure your business reaches the right audience, whether regionally or nationally. MacRAE'S focuses on driving organic traffic, optimizing for local search, and improving search engine rankings for industrial clients. They also offer web design and development services, ensuring that their client’s websites are not only SEO-optimized but also well-structured and user-friendly. Their data-driven strategies and decades of experience make them a go-to choice for industrial businesses looking to grow their online presence.6. SEO Inc.
Revenue: $100M
Established: 1997
Headquarters: Carlsbad, CA
Notable Services: Technical SEO, On-Page Optimization, Local SEO
Reason for Ranking: Over 20 years of experience, with a strong focus on B2B SEO.
With over 20 years of experience, SEO Inc. provides tailored SEO solutions for businesses in the industrial and B2B sectors. Their services focus on technical SEO, on-page optimization, and local SEO services that help businesses improve their search rankings and attract new customers. SEO Inc. is known for delivering effective SEO strategies that meet the unique needs of B2B and industrial companies.7. Victorious
Revenue: $98M
Established: 2012
Headquarters: San Francisco, CA
Notable Services: SEO Audits, On-Page Optimization, Local SEO
Reason for Ranking: Data-driven approach tailored for long-term B2B success.
Victorious is known for its data-driven SEO strategies, offering services designed specifically for B2B clients. Their approach includes detailed SEO audits, on-page optimization, and local SEO services that help businesses achieve long-term success. Victorious is a top choice for B2B companies in the US looking to improve their organic rankings through actionable SEO strategies.8. SmartSites
Revenue: $95M
Established: 2011
Headquarters: Paramus, NJ
Notable Services: Technical SEO, Keyword Research, Local SEO
Reason for Ranking: Strong focus on B2B and manufacturing SEO services.
SmartSites provides full-service SEO solutions for businesses in various industries, including B2B manufacturing companies. Their team specializes in technical SEO, keyword research, and local SEO services, helping businesses increase visibility and attract new customers. With tailored strategies that align with clients' goals, SmartSites has established itself as one of the largest SEO companies in the USA.9. Ignite Visibility
Revenue: $90M
Established: 2013
Headquarters: San Diego, CA
Notable Services: On-Page Optimization, Content Marketing, Local SEO
Reason for Ranking: Comprehensive services for B2B and industrial companies.
Ignite Visibility is a full-service SEO company offering solutions for B2B and industrial businesses. Their team specializes in on-page optimization, content marketing, and local SEO services, helping businesses improve search rankings on both a global and local scale. Ignite Visibility is known for helping clients enhance their online visibility and achieve measurable growth through comprehensive SEO strategies.10. 1Digital Agency
Revenue: $85M
Established: 2012
Headquarters: Philadelphia, PA
Notable Services: Technical SEO, Keyword Targeting, Local SEO
Reason for Ranking: Specializes in ecommerce SEO and B2B strategies.
1Digital Agency offers advanced SEO solutions for both ecommerce and B2B clients. Their services include technical SEO, keyword targeting, and local SEO services to help businesses improve search visibility and drive traffic. Known for their specialized approach, 1Digital Agency helps businesses establish a strong foundation for long-term SEO success.11. Straight North
Revenue: $80M
Established: 1997
Headquarters: Chicago, IL
Notable Services: Lead Generation, Content Optimization, Local SEO
Reason for Ranking: Focuses on lead generation and technical SEO for B2B clients.
Straight North focuses on lead generation and SEO strategies designed specifically for B2B companies. They specialize in technical SEO, content optimization, and local SEO services, helping businesses improve their rankings and attract qualified leads. Straight North’s data-driven approach ensures that their SEO strategies are aligned with the specific goals of each client.12. Directive
Revenue: $78M
Established: 2014
Headquarters: Irvine, CA
Notable Services: Performance-Driven SEO, On-Page Optimization, Local SEO
Reason for Ranking: Known for performance-driven SEO strategies and delivering measurable outcomes.
Directive provides performance-driven SEO solutions for B2B and industrial clients, focusing on measurable outcomes. Their SEO services include technical SEO, on-page optimization, and local SEO services that help businesses improve rankings and attract more traffic. Directive is trusted by B2B companies across the US for their expertise in delivering results-driven SEO strategies.13. Boostability
Revenue: $70M
Established: 2009
Headquarters: Lehi, UT
Notable Services: Affordable SEO, Technical SEO, Local SEO
Reason for Ranking: Affordable SEO services for small and medium businesses.
Boostability offers affordable SEO services tailored to small and medium-sized businesses in the B2B sector. Their services include content optimization, technical SEO, and local SEO services that help businesses improve their visibility and attract new customers. Boostability is known for delivering cost-effective SEO solutions that generate results for smaller companies.14. Big Leap
Revenue: $68M
Established: 2008
Headquarters: Lehi, UT
Notable Services: Technical SEO, Keyword Research, Local SEO
Reason for Ranking: Transparent SEO strategies with a focus on B2B clients.
Big Leap provides transparent SEO strategies for B2B and industrial companies. Their services include technical SEO, keyword research, and local SEO services that help businesses improve their rankings and attract more qualified leads. Big Leap is a trusted SEO partner for many businesses in the US, known for delivering results that align with client goals.15. Mabbly
Revenue: $65M
Established: 2013
Headquarters: Chicago, IL
Notable Services: Full-Service SEO, Content Marketing, Local SEO
Reason for Ranking: Customized full-service SEO solutions for long-term success.
Mabbly offers full-service SEO solutions that cater to B2B clients, including industrial companies. Their team specializes in technical SEO, content marketing, and local SEO services, helping businesses improve search visibility and attract more customers. Mabbly’s customized approach helps B2B businesses achieve long-term success through strategic SEO efforts.Finding the Right SEO Partner for Your Business
These SEO companies in the USA represent some of the largest and most successful agencies in 2024. Whether you’re seeking tailored solutions for B2B industrial SEO or need local SEO services to boost your visibility in regional markets, each company offers unique expertise. From MacRAE'S, with its focus on industrial clients, to agencies like WebFX and Victorious, you’ll find a partner who understands your business and can help you grow through effective SEO strategies. If your goal is to improve your online presence and drive long-term success, exploring these SEO companies is a great place to start.
