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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1591Undisclosed250 - 999 employeesLos Angeles, CADMA Central is a Marketing Strategy company. The team offers Marketing Strategy and Market Research and is located in Los Angeles, California.Read More
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1592$1,000+2 - 9 employeesSan Jose, CADonRoberts.com Small Business Marketing, a SEO agency, is located in San Jose, California. Their services include Search Engine Optimization and Marketing Strategy.Read More
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1593$1,000+2 - 9 employeesRoseville, CATDL Local SEO & Digital Marketing is a SEO agency founded in 2018. The team provides Search Engine Optimization and Web Design and is based in Roseville, California.Read More
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1594$5,000+2 - 9 employeesSanta Monica, CAHatter AI Search is a SEO agency. Founded in 2024, the agency is located in Santa Monica, California. Their services include Search Engine Optimization and AI Consulting.Read More
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1595$1,000+Freelancer employeesSantee, CAJENRUHMAN is a SEO company. They were launched in 2004, and their services include Search Engine Optimization and Web Design.Read More
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1596$5,000+10 - 49 employeesLos Angeles, CASeoluxor is a SEO company founded in 2006. Their services include Search Engine Optimization and Conversion Optimization.Read More
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1597Undisclosed10 - 49 employeesWest Hollywood, CARead More
SmallGiants is a web development firm in London, United Kingdom. The small firm was founded in 2018. Their team provides web development, ux/ui design, application management & support, advertising, and more.
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1598Undisclosed10 - 49 employeesGlendale, CARead More
Located in Glendale, California, INSPREE is a small web design agency. Their services include web design, social media marketing, and search engine optimization.
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1599$1,000+2 - 9 employeesSunnyvale, CALaunched in 2012, Designs Engine is a Logo company. The small team provides Logo and Web Design.Read More
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1600Undisclosed2 - 9 employeesThousand Oaks, CACaliNetworks is a SEO agency. The small Thousand Oaks, California-based team specializes in Search Engine Optimization and Pay Per Click. The agency was founded in 1999.Read More
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1601$10,000+2 - 9 employeesPalo Alto, CANakora is a SEO services firm. They provide Search Engine Optimization and AI Consulting and were launched in 2025.Read More
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1602Undisclosed2 - 9 employeesSan Jose, CAWSI Net Advantage is a SEO services firm. Their team is based in San Jose, California and specializes in Search Engine Optimization and Email Marketing.Read More
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1603$5,000+2 - 9 employeesOakland, CAMeetGeraldine is a SEO services firm. They offer Search Engine Optimization and Marketing Strategy and are located in Oakland, California and Los Angeles, California.Read More
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1604Undisclosed2 - 9 employeesBeverly Hills, CAEstablished in 2013, Barclay Digital is a Business Consulting company. The agency offers Business Consulting and Search Engine Optimization, and is small.Read More
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1605Undisclosed2 - 9 employeesLos Angeles, CAQuinn Tech Consulting is a Business Consulting company founded in 1999. Headquartered in Los Angeles, California, the team specializes in Business Consulting and Search Engine Optimization.Read More
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1606Undisclosed2 - 9 employeesRedding, CAReverse Focus is a small Marketing Strategy company founded in 2007. Their services include Marketing Strategy and CRM consulting and SI.Read More
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1607Undisclosed2 - 9 employeesAnaheim, CAAnaheim Digital Marketing is a web design company. Their small team is in Anaheim, California. Their services include Web Design and Search Engine Optimization.Read More
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1608Undisclosed2 - 9 employeesBrentwood, CAOld River Media Group is a Brentwood, California-based SEO agency. The team provides Search Engine Optimization and Content Marketing.Read More
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1609Undisclosed2 - 9 employeesHuntington Beach, CAPh-IT Solutions, an IT managed services company, was launched in 2000. Based in Huntington Beach, California, the team specializes in IT managed services and Search Engine Optimization.Read More
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1610Undisclosed2 - 9 employeesIrvine, CAEssassin Target Marketing is a social media marketing agency. Their team is based in Irvine, California and offers Social Media Marketing and Search Engine Optimization.Read More
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1611Undisclosed2 - 9 employeesSanta Barbara, CAWeb design company Phi Web Studio was launched in 2008. The team focuses on Web Design and Web Development and is headquartered in Santa Barbara, California.Read More
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1612Undisclosed2 - 9 employeesLos Angeles, CAGlobal Digital Online is a small Los Angeles, California-based SEO agency. The team specializes in Search Engine Optimization and Web Design.Read More
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1613Undisclosed2 - 9 employeesSan Luis Obispo, CADodeca Digital is a Blockchain Marketing company. Located in San Luis Obispo, California, the company offers Blockchain Marketing and Search Engine Optimization.Read More
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1614Undisclosed2 - 9 employeesSan Jose, CAWebsite SEO Today is a SEO services firm. They are headquartered in San Jose, California and have small team. Their services include Search Engine Optimization and Social Media Marketing.Read More
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1615Undisclosed2 - 9 employeesFontana, CASEO services firm Mobile Giant was founded in 2012. The firm offers Search Engine Optimization and Web Design.Read More
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1616Undisclosed2 - 9 employeesPleasanton, CABased in Pleasanton, California, Marketing Advantage Plus is a social media marketing agency. Their services include Social Media Marketing and Search Engine Optimization.Read More
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1617$5,000+10 - 49 employeesPleasanton, CAPurple Cow Agency, a social media marketing firm, is located in Pleasanton, California and Cebu City, Philippines. They specialize in Social Media Marketing and Search Engine Optimization.Read More
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1618$1,000+2 - 9 employeesSanta Ana, CASagaReach Marketing is a SEO services firm. They were launched in 2021 and specialize in Search Engine Optimization and Pay Per Click.Read More
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1619$1,000+2 - 9 employeesRedondo Beach, CAArt of Next is a Digital Strategy company. Their small team is in Taipei, Taiwan and Redondo Beach, California and offers Digital Strategy and Social Media Marketing. The company was launched in 2023.Read More
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1620Undisclosed2 - 9 employeesHemet, CAPure Junk Media is a social media marketing firm launched in 1998. The small team provides Social Media Marketing and Search Engine Optimization.Read More
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