Top 100 SEO Companies in California
The Best of September 2026Looking for a top SEO firm in California?
Compare top-performing SEO agencies to see which may be the best fit for your business goals. Whether you're seeking to improve your ranking in search engine results pages, boost website traffic, or show up in local search results, investing in SEO is important for business growth.
To assist you in your search for a partner, we’ve compiled this list of the top SEO companies in California. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
Jump to Most Reviewed Companies
List of the Best California SEO Firms
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1891$50,000+250 - 999 employeesSan Francisco, CAGyro, a web design company, was established in 1981. The agency specializes in Web Design and Digital Strategy.Read More
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1892$5,000+2 - 9 employeesSan Francisco, CALevel343, a branding company, was established in 1998. The agency focuses on Branding and Digital Strategy.Read More
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1893$5,000+2 - 9 employeesSan Francisco, CACalifornia SEO Professionals is a Content Marketing company launched in 2012. The company specializes in Content Marketing and Conversion Optimization, and is small.Read More
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1894Undisclosed2 - 9 employeesLos Angeles, CAEstablished in 2023, Pro Brain Solutions is a SEO agency. The small team offers Search Engine Optimization and IT managed services.Read More
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1895$1,000+10 - 49 employeesSan Jose, CABranding company Click Catalyst Digital Marketing Agency was launched in 2012. The team specializes in Branding and Digital Strategy and is located in San Jose, California.Read More
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1896$5,000+10 - 49 employeesSanta Clarita, CASEO agency NextClient was launched in 2000. The firm focuses on Search Engine Optimization and Web Design, and is small.Read More
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1897$50,000+250 - 999 employeesSan Francisco, CATransmission is a branding firm based in Dallas, Texas and London, England. The team offers Branding and Media Planning & Buying.Read More
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1898$1,000+2 - 9 employeesLos Angeles, CAWelby Creative is a web design agency. They were founded in 2019, and their services include Web Design and Graphic Design.Read More
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1899$1,000+2 - 9 employeesSan Diego, CADigital Strategy company Accelerate Marketing was established in 2007. Headquartered in San Diego, California, the team focuses on Digital Strategy and Email Marketing.Read More
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Empire IndustriesIndustries
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1900$5,000+2 - 9 employeesSan Jose, CAHiveMind Studios is an Advertising company. Headquartered in San Jose, California, the team focuses on Advertising and Branding.Read More
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1901Undisclosed2 - 9 employeesSanta Barbara, CAAmeravant Web Design Studio is a Digital Strategy company. The Santa Barbara, California-based firm specializes in Digital Strategy and Search Engine Optimization.Read More
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1902$1,000+Freelancer employeesLos Angeles, CABest Roofing SEO Services, a SEO services firm, was launched in 2022. The team provides Search Engine Optimization and Web Development.Read More
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1903$1,000+10 - 49 employeesAgoura Hills, CAEstablished in 2022, Pro Seller Marketing, a small Advertising company, is in Agoura Hills, California. Their team offers Advertising and Search Engine Optimization.Read More
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1904$1,000+2 - 9 employeesPasadena, CAL2 Digital Marketing is a SEO agency. Launched in 2019, the firm focuses on Search Engine Optimization and Web Design.Read More
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1905$1,000+10 - 49 employeesSan Francisco, CAFounded in 2013, OrganizeIn is a pay per click agency. The small team provides Pay Per Click and Search Engine Optimization.Read More
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1906$1,000+10 - 49 employeesSan Francisco, CAGetLegal is an Advertising company. Headquartered in San Francisco, California, the firm was established in 1999. Their team offers Advertising and Search Engine Optimization.Read More
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1907$1,000+10 - 49 employeesDublin, CAOpal Infotech INC is a SEO company. They are based in Dublin, California. Their team provides Search Engine Optimization and Pay Per Click.Read More
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1908$5,000+2 - 9 employeesRiverside, CAArkside Marketing, Inc. Is an Advertising company. Their small team of employees is located in Riverside, California. Their team offers Advertising and Branding.Read More
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1909Undisclosed2 - 9 employeesOrange, CAOrange Web Group, LLC, a SEO company, is in Orange, California. Their services include Search Engine Optimization and Social Media Marketing.Read More
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1910$5,000+2 - 9 employeesSan Jose, CARobert Nicholson Consulting is a social media marketing agency. Launched in 2016, the company specializes in Social Media Marketing and Search Engine Optimization.Read More
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1911UndisclosedFreelancer employeesClovis, CAAshmith.com is a web design company. The team focuses on Web Design and Search Engine Optimization, and the company is based in Clovis, California.Read More
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1912$5,000+250 - 999 employeesLos Angeles, CATeam One is a Digital Strategy company. Established in 1987, the team offers Digital Strategy and Advertising.Read More
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The Ritz CarltonIndustries
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1913Undisclosed250 - 999 employeesSan Francisco, CADemandbase, a branding firm, is headquartered in San Francisco, California and St Albans, England. They focus on Branding and Marketing Strategy.Read More
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1914UndisclosedFreelancer employeesSanta Monica, CAGlorious Concepts LLC is a small SEO services firm in Santa Monica, California. Their services include Search Engine Optimization and Web Design.Read More
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1915$5,000+2 - 9 employeesLos Angeles, CASEO Services LA is a small Los Angeles, California-based SEO company. Their services include Search Engine Optimization and Web Design.Read More
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1916UndisclosedFreelancer employeesStockton, CAMarquis Trail Marketing is a Stockton, California-based SEO services firm. Established in 2016, the team provides Search Engine Optimization.Read More
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1917Undisclosed50 - 249 employeesCosta Mesa, CASEO services firm and social media marketing company 247.inc is in Costa Mesa, California. They focus on Search Engine Optimization and Social Media Marketing.Read More
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1918Undisclosed50 - 249 employeesRoseville, CAFounded in 2006, OnSumaye Web Solutions is a Marketing Strategy and SEO services firm. The team focuses on Marketing Strategy and Search Engine Optimization.Read More
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1919Undisclosed50 - 249 employeesBrea, CAIntact Info, a midsize public relations firm, is based in Brea, California. Their services include Public Relations and Social Media Marketing.Read More
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1920Undisclosed50 - 249 employeesSunnyvale, CABaidu USA is an artificial intelligence firm. The Sunnyvale, California-based company was founded in 2014. Their team specializes in Artificial Intelligence and Advertising.Read More
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