Top 100 SEO Companies in California
The Best of December 2025Looking 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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$1,000+50 - 249 employeesSan Antonio, TXFunnel Boost Media is a SEO company. They are located in San Antonio, Texas; Doral, Florida; Boston, Massachusetts and San Francisco, California and have a midsize team that focuses on Search Engine Optimization, Advertising, Pay Per Click, and Web Design. The agency was launched in 2012.Read More
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$1,000+10 - 49 employeesNew York, NYSEO company NuStream is in New York, New York; Philadelphia, Pennsylvania and Allentown, Pennsylvania. They provide Search Engine Optimization, Web Design, Digital Strategy, and Video Production and were established in 2010.Read More
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1411Undisclosed2 - 9 employeesCampbell, CARead More
Xendup is an SEO company based in San Jose, Calif. The company has a team of less than ten that provides SEO and content marketing services to various companies.
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1412Undisclosed2 - 9 employeesSan Jose, CAJM Internet Group is a SEO company. They are in San Jose, California, and their services include Search Engine Optimization and Social Media Marketing.Read More
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1413$1,000+2 - 9 employeesRohnert Park, CAIn Rohnert Park, California, Techeffex is a SEO company. They offer Search Engine Optimization and Web Design.Read More
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1414Undisclosed2 - 9 employeesSanta Barbara, CASEO services firm Generative Traffic focuses on Search Engine Optimization. They are based in Santa Barbara, California.Read More
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1415$5,000+10 - 49 employeesSeattle, WARead More
Digital strategy company Google Certified Marketing | Top Rated Talent at your Fingertips was launched in 2011. Their small team is headquartered in Seattle, Washington and Portland, Oregon. Their services include digital strategy, social media marketing, content marketing, search engine optimization, and more.
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1416$1,000+10 - 49 employeesSan Diego, CABased in San Diego, California, SEO.RUN is a SEO company. Established in 1999, the team specializes in Search Engine Optimization and UX/UI Design.Read More
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1417$1,000+Freelancer employeesLos Alamitos, CAMichael Winchester Design is a SEO services firm and web design agency. The Los Alamitos, California-based team focuses on Search Engine Optimization and Web Design.Read More
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1418Undisclosed2 - 9 employeesKingsburg, CASEO company 99 Connections is in Kingsburg, California. Their services include Search Engine Optimization and Social Media Marketing.Read More
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1419Undisclosed2 - 9 employeesLake Forest, CABirdie SEO, a PPC agency, is located in Lake Forest, California. They provide Pay Per Click and Search Engine Optimization.Read More
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1420Undisclosed2 - 9 employeesLivermore, CAEstablished in 2015, NAE IT Services, a small pay per click company, is located in Livermore, California. Their services include Pay Per Click and Search Engine Optimization.Read More
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1421Undisclosed2 - 9 employeesRichmond, CAThe Light Digital is a SEO agency based in Richmond, California. Their services include Search Engine Optimization and Social Media Marketing.Read More
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1422$5,000+10 - 49 employeesCulver City, CANoxster is a small SEO services firm headquartered in Culver City, California. The team offers Search Engine Optimization and Web Design.Read More
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1423Undisclosed10 - 49 employeesSan Rafael, CABleu Marketing is a branding firm founded in 2001. The team focuses on Branding and Search Engine Optimization and is located in San Rafael, California.Read More
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1424Undisclosed10 - 49 employeesLos Angeles, CARevolution Media is a media planning & buying company launched in 2001. The agency specializes in Media Planning & Buying and Advertising, and is small.Read More
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1425Undisclosed10 - 49 employeesUpland, CAResource Computer Solutions is a small Upland, California-based IT managed services company. Their services include IT managed services and Cybersecurity.Read More
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1426Undisclosed10 - 49 employeesWalnut Creek, CAPercepticon Corporation is a social media marketing company. Established in 1993, their team offers Social Media Marketing and Search Engine Optimization.Read More
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1427Undisclosed10 - 49 employeesStockton, CADeniro Marketing is an Advertising company. The Stockton, California-based company focuses on Advertising and Search Engine Optimization.Read More
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1428Undisclosed10 - 49 employeesAnaheim, CADental Office Website is a web design company based in Anaheim, California. Their services include Web Design and Search Engine Optimization.Read More
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1429Undisclosed10 - 49 employeesEscondido, CALaunched in 2003, 1st Class Writing is a small Escondido, California-based Content Writing Services company. Their team specializes in Content Writing Services and Content Marketing.Read More
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1430Undisclosed10 - 49 employeesSan Diego, CAStraight Up Growth = Amazon is a PPC agency. Founded in 2019, their team focuses on Pay Per Click and Search Engine Optimization.Read More
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1431Undisclosed10 - 49 employeesWestminster, CASocial Wolves is a web development firm established in 2016. The team focuses on Web Development and Social Media Marketing and is headquartered in Westminster, California.Read More
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1432$1,000+50 - 249 employeesSan Diego, CASOCi, an Advertising company, was launched in 2012. The firm offers Advertising and Social Media Marketing.Read More
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1433Undisclosed50 - 249 employeesUpland, CAInent Inc is a SEO company founded in 2010. The team offers Search Engine Optimization and IT staff augmentation.Read More
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1434Undisclosed50 - 249 employeesRedwood City, CAPierry Inc., A Wunderman Thompson Company, a CRM consulting and SI company, provides CRM consulting and SI and Email Marketing. The agency is based in Redwood City, California.Read More
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1435Undisclosed50 - 249 employeesFremont, CARead More
EZdia Inc. Is an artificial intelligence development company in Fremont, California. The midsize team offers Artificial Intelligence, content marketing, e-commerce development, and search engine optimization. The company was launched in 2010.
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1436Undisclosed50 - 249 employeesRoseville, CAKukui Corporation is an Advertising company. The agency is based in Roseville, California. Their services include Advertising and Conversion Optimization.Read More
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1437Undisclosed50 - 249 employeesMurrieta, CAProSites is a social media marketing firm. Launched in 2003, the company is located in Murrieta, California. Their services include Social Media Marketing and Search Engine Optimization.Read More
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1438Undisclosed50 - 249 employeesRoseville, CABlastX Consulting is a SEO services firm. The Roseville, California-based company was launched in 1999. Their team specializes in Search Engine Optimization and UX/UI Design.Read More
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1439UndisclosedFreelancer employeesOakland, CAPaul Andre is a SEO company. They focus on Search Engine Optimization and Pay Per Click and were launched in 2023. The firm is located in Oakland, California.Read More
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1440$10,000+10 - 49 employeesLos Angeles, CAFounded in 2018, FluidRank is an e-commerce development firm. Their services include E-Commerce Development and Web Design.Read More
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