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.
List of the Best California SEO Firms
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391$1,000+2 - 9 employeesTustin, CAWhiskey SEO is a SEO services firm. They specialize in Search Engine Optimization and are based in Tustin, California.Read More
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392$1,000+10 - 49 employeesYuba City, CALocated in Dhaka, Bangladesh and Yuba City, California, Doodle Digital is a SEO agency. Their services include Search Engine Optimization and Social Media Marketing.Read More
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393Undisclosed10 - 49 employeesSan Diego, CAPinned SEO is a SEO services firm. The team offers Search Engine Optimization and is located in San Diego, California and Newport Beach, California.Read More
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394$1,000+2 - 9 employeesHuntington Beach, CAJackson Digital is a Huntington Beach, California-based SEO services firm. They provide Search Engine Optimization, Social Media Marketing, and Pay Per Click and were launched in 2018.Read More
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395Undisclosed2 - 9 employeesNewport Beach, CARead More
Business Catalyst Consulting is a marketing agency headquartered in Newport Beach, Calif. The team of two has been assisting clients with branding, content marketing, and digital strategy since 2010.
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396$5,000+2 - 9 employeesLemon Grove, CAEstablished in 2000, SandiWeb is a SEO company. The team provides Search Engine Optimization and Advertising.Read More
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397$1,000+2 - 9 employeesSan Francisco, CARead More
RiseOpp SEO Company is a SEO services firm established in 2014. Headquartered in San Francisco, California, their small team offers search engine optimization, marketing strategy, digital strategy, content marketing, and more.
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398$1,000+2 - 9 employeesSan Diego, CASandy Eggo SEO is a SEO company. They are headquartered in San Diego, California. Their team specializes in Search Engine Optimization and Content Marketing.Read More
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399$1,000+2 - 9 employeesLos Angeles, CASitelinx Internet Solutions is a SEO agency. Based in Los Angeles, California, the company was founded in 2010. Their services include Search Engine Optimization and Artificial Intelligence.Read More
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400$1,000+2 - 9 employeesSan Diego, CAHum JAM is a SEO company. Established in 2020, their team specializes in Search Engine Optimization.Read More
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401$1,000+2 - 9 employeesLos Angeles, CAFounded in 2020, Local Ranker US is a SEO services firm. The team specializes in Search Engine Optimization.Read More
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402$1,000+50 - 249 employeesBakersfield, CAAmzlisters is a SEO agency. Based in Bakersfield, California, the company was established in 2020. Their services include Search Engine Optimization.Read More
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403Undisclosed10 - 49 employeesSan Francisco, CASEO Disrupt, a SEO company, was launched in 2025. They offers Search Engine Optimization.Read More
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404$1,000+2 - 9 employeesLos Angeles, CAAB Designs is a SEO agency. Their team is based in Greyton, South Africa and Los Angeles, California and focuses on Search Engine Optimization and Web Design.Read More
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405$1,000+2 - 9 employeesLos Angeles, CASEO company Marketing1on1 is in Los Angeles, California. Their services include Search Engine Optimization and Digital Strategy.Read More
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406Undisclosed2 - 9 employeesTustin, CATustin SEO Services, a SEO agency, is in Tustin, California. Their services include Search Engine Optimization and Web Design.Read More
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407$1,000+2 - 9 employeesFremont, CAAI Search Rankings is a SEO services firm. The Fremont, California-based agency was founded in 2025. Their services include Search Engine Optimization and AI Agents.Read More
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Legal Documents HubIndustries
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408$25,000+10 - 49 employeesCulver City, CAAgency 39A, an IT strategy consulting company, was launched in 2019. The small team focuses on IT strategy consulting and Business Consulting.Read More
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San Ysidro Health Mispro CLSI MustardSeed PMOIndustries
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409$1,000+50 - 249 employeesLos Angeles, CARead More
Websites Depot Inc. is a Los Angeles-based digital marketing agency that was founded in 2006. With a team of about 30, Websites Depot Inc. specializes in SEO, web design, and PPC.During the first three years of partnership, Websites Depot Inc. helped the air conditioning company attract qualified leads and become a well-known brand in the Los Angeles area.
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TraneIndustries
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410$5,000+2 - 9 employeesNewport Beach, CADrofire is an Advertising company. In Seattle, Washington and Newport Beach, California, their small team focuses on Advertising, Branding, Marketing Strategy, Media Planning & Buying, and more. The agency was launched in 2017.Read More
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411$1,000+Freelancer employeesLos Angeles, CAVisionwebppc is a small SEO company based in Los Angeles, California. The team provides Search Engine Optimization.Read More
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412Undisclosed2 - 9 employeesOrangevale, CAInfoStar Productions is a SEO agency. They provide Search Engine Optimization and Social Media Marketing and were founded in 1993. The company is in Orangevale, California.Read More
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413Undisclosed2 - 9 employeesLos Angeles, CASearch engine optimization audit is a SEO agency. Their small team of employees is headquartered in Los Angeles, California. Their team provides Search Engine Optimization.Read More
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414$1,000+2 - 9 employeesSimi Valley, CASimi Valley SEO Agency, a SEO agency, focus on Search Engine Optimization. They were founded in 2022.Read More
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415$1,000+10 - 49 employeesLos Angeles, CABased in Los Angeles, California, Moriarty SEM is a small SEO services firm. The team offers Search Engine Optimization and Account-Based Marketing.Read More
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416$1,000+2 - 9 employeesSan Francisco, CAMap Ranker is a SEO company. Located in San Francisco, California, their team offers Search Engine Optimization.Read More
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417$1,000+50 - 249 employeesSan Jose, CALaunched in 2019, SEO San Jose is a SEO agency. The team specializes in Search Engine Optimization and Mobile App Development.Read More
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418$1,000+2 - 9 employeesSan Francisco, CAMonthlySEOPacks, a SEO agency, was launched in 2025. Located in San Francisco, California, the team offers Search Engine Optimization.Read More
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419$1,000+2 - 9 employeesRancho Cordova, CALaunched in 2005, American Precision Heating and Air is a SEO agency. Headquartered in Rancho Cordova, California, the team offers Search Engine Optimization.Read More
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420$1,000+2 - 9 employeesLos Angeles, CAVerbatim Marketing Agency, a SEO services firm, was founded in 2013. The company focuses on Search Engine Optimization and Conversion Optimization.Read More
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