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.
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
Industries
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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
Industries
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2881Undisclosed10 - 49 employeesLos Angeles, CATechTilt Technologies , an UX company, is in Chennai, India and Los Angeles, California. The team specializes in UX/UI Design and Mobile App Development.Read More
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2882Undisclosed10 - 49 employeesSan Francisco, CALocated in Brooklyn, New York and San Francisco, California, Whole Whale is an Advertising company. Founded in 2010, the team focuses on Advertising and Social Media Marketing.Read More
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2883$1,000+50 - 249 employeesPalo Alto, CAIn Palo Alto, California and Garland, Texas, Stellr IT LLC is a midsize social media marketing firm. The team specializes in Social Media Marketing and Custom Software Development.Read More
Industries
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2884$5,000+10 - 49 employeesLos Angeles, CAJam3 is a SEO agency. The Toronto, Canada-based company was established in 2003. Their team offers Search Engine Optimization and Web Design.Read More
Industries
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2885Undisclosed10 - 49 employeesSan Diego, CADigital Mark Group is an Advertising company. Founded in 2014, their team provides Advertising and Pay Per Click.Read More
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2886Undisclosed50 - 249 employeesSan Francisco, CABuzzBoard is a CRM consulting and SI company. The team is in San Francisco, California and Lyndhurst, New Jersey, and their services include CRM consulting and SI and Sales Outsourcing.Read More
Industries
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2887$5,000+1,000 - 9,999 employeesLos Angeles, CAUser experience agency Huge was founded in 1999. The company provides UX/UI Design and Branding, and is large.Read More
Clients
Canada GooseIndustries
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2888$10,000+1,000 - 9,999 employeesMountain View, CAGrand IT is a Mountain View, California-based SEO services firm. The team specializes in Search Engine Optimization and Web Design.Read More
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2889$5,000+250 - 999 employeesCulver City, CAFounded in 1969, MXM (Meredith Xcelerated Marketing) is a midsize Culver City, California-based Content Marketing company. Their services include Content Marketing and Digital Strategy.Read More
Clients
KraftHeinzIndustries
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2890$10,000+50 - 249 employeesIrvine, CAFleishmanHillard HighRoad is a midsize Toronto, Canada-based public relations company. Their services include Public Relations and Web Design.Read More
Industries
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2891Undisclosed250 - 999 employeesSan Francisco, CAAB Tasty is a midsize Conversion Optimization company. Founded in 2009, the team offers Conversion Optimization and Search Engine Optimization.Read More
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Check out a SEO Company in California with the most new reviews in the past 12 months.
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