Best SEO Agencies in California (2026) – Ranked by Case Studies
SEO
Finance
51-200 Employees
N/A
San Diego, CA
N/A- 41.1% Increase in Organic Sessions
- 43.2% Increase in Organic Leads
- #1 Rankings for Focus Keywords
SEO, Content MarketingSaaS11-50 EmployeesN/ASan Francisco, CAN/A- 67% Increase in Average Organic Traffic (US)
- 234% Increase in Ranking Keywords (US)
- 212% Increase in Keywords Ranking Positions 1-3 (US)
SEO, PPC, Content MarketingAutomotive11-50 EmployeesN/ALos Angeles, CAN/A- 53% Increase in Goal Completions
- 44% Increase in Goal Conversion Rate
- 52% Increase in Site Traffic
- 49% Increase in Paid Goal Completions
- 37% Increase in Visitors from Organic Search
SEO, Local SEO, Web DesignRetailN/AN/AMoorpark, CAN/A- 105% Increase in Organic Form Submissions YoY
- 103% Increase in Information Request Forms
- 48% Increase in Organic Traffic YoY
SEO, Reputation ManagementPelvic Care1-10 EmployeesN/ASanta Rosa, CAN/A- 345% increase in organic traffic
- 57% increase in goal completions
- 100% attribution measured
SEO, Content MarketingGaming1K-5K EmployeesN/ALos Angeles, CAN/A- 6,700% increase in video views
- 120+ core brand videos optimized (Wave 1)
Content Marketing, SEOTechnologyN/AN/ASan Francisco, CAN/A- 45+ unique stories across 40+ publications in under 6 months
- First Forbes feature within 7 weeks of onboarding
- Backlinks nearly doubled, from 14K to 27K
- Domain rating up from 63 to 69 (March to August 2026)
- Bond announcement drew 8 pieces of coverage in 24 hours
Content Marketing, SEOTechnologyN/AN/ASan Francisco, CAN/A- 50 approved media placements over 5 months
- 6.7M total views across earned media and syndications
- Domain Rating of 69
- 26,000 backlinks from 2,700 referring websites
SEOTechnologyN/AN/AFremont, CAN/A- 70% ROI
- 2.08M impressions and 16K+ clicks
- 84K+ sessions at an 88.94% engagement rate
- 500+ key events
PPC, SEOMediaN/AN/ALos Angeles, CAN/A- 32 conversions at an $89.12 cost per conversion
- 5.75% average conversion rate
- 2.9K+ sessions and 1.9K+ new users
- 53.57%+ engagement rate
- 5.5K+ organic impressions
SEORetailN/AN/ACastro Valley, CAN/A- Bounce rate down 88%
- Average time on site up 49% and pages per session up 57%
- 400+ "Not Found" errors cut 90%
- 500 server errors cut 99%
PPC, SEO, GEORetailN/AN/AVista, CAN/A- 100% increase in sales after relaunching paid campaigns
- 90% more sessions
- 11% improvement in conversion rate
Web Development, SEOHome ServicesN/AN/ACalifornia, United StatesN/A- Tracked leads per day up 88% in the first two weeks
- Phone calls per day up 112% vs. pre-launch
- Google Business Profile leads per day up 7x and organic clicks up 2.6x
Web Development, SEOHome ServicesN/AN/ACamarillo, CAN/A- Sessions up 177% year over year and Search Console clicks up 33%
- Google Business Profile impressions up 82% since cutover
- Website-attributed sales up 818% ($29,704 to $272,569) from May to July
- Net margins grew from 10% to 25% after turning paid ads off
Content Marketing, SEOCBDN/AN/ALos Angeles, CAN/A- Organic Keywords +45x
- Organic Traffic +117%
- Page 1 Ranking Keywords +22%
PPC, Email Marketing, SEO, Content MarketingHome SecurityN/AN/ALos Angeles, CAN/A- Quality Leads +20%
- First Page Rankings +2,894%
- Cost Per Lead -61%
SEO, Technical SEOPublishingN/AN/AIrvine, CAN/A- 2M to 7M Increase in Monthly Visits
- $2M/Month in Organic Revenue
SEO, Technical SEO, Content MarketingEntertainment501-1K EmployeesN/ASan Francisco, CAN/A- 1500% Increase in Organic Search Traffic
- Unique Visitors Doubled in 2 Months
- Acquired by News Corp for $650M
SEO, PPCLaw FirmN/AN/ARedding, CAN/A- 192 PPC leads, with a 53% conversion rate and 95% from live phone calls
- Cost per lead cut from $172.50 to $128.64 in three months
- 220% increase in organic traffic
Lead Generation, PPC, SEOInsurance11-50 EmployeesN/ALos Altos, CAN/A- 31 B2B leads and 28 meetings in under 60 days
- PPC landing pages converted 5.36% of visitors at about $138 per conversion
SEOFashion51-200 EmployeesN/AFallbrook, CAN/A- 86 of 90 tracked keywords ranking #1
- Organic revenue doubled from $60,000 to $120,000 per quarter
- 3,000 organic shopping visits in 3 months from Merchant Center optimisation
SEOFashion51-200 EmployeesN/AChatsworth, CAN/A- Page 1 on Google above Victoria's Secret in 90 days
SEOManufacturing11-50 EmployeesN/ALos Angeles, CAN/A- 27 First Page Rankings for Relevant Keywords (up From 0)
- 328 New Keywords Added to Google
SEOFashionN/AN/APomona, CAN/A- 21 Current First Page Rankings (up From 1)
- 607 New Keywords Added to Google
Web Design, SEO, BrandingConstruction11-50 EmployeesN/ALos Angeles, CAN/A- 5X monthly users
- 15X monthly sessions
- 4.5X page views
- 27% reduction in bounce rate
SEOMoving201-500 EmployeesN/AAlameda, CAN/A- 17x increase in organic traffic
- 282% increase in organic rankings
- 60x increase in SEO-driven conversions
SEO, Content MarketingConsumer Goods201-500 EmployeesN/AIrvine, CAN/A- 259% year-over-year growth in refrigeration category entries
- 82% increase in non-branded refrigeration keyword rankings
- 251% growth in Page 1 rankings for high-intent queries
SEOManufacturing11-50 EmployeesN/ARialto, CAN/A- 425% increase in goal conversions in 9 months
- 60% of goal conversions came from organic sources
- Website traffic up 250% in the first 6 months
- New users up 41% in the first 6 months
SEO, Web DesignManufacturing1-10 EmployeesN/ASacramento, CAN/A- Organic Google search traffic +419% vs. the prior eight months
- Organic traffic grew from ~50 visitors per week to 6x in under six months
- Direct sales surpassed distributor sales by the start of month five
- Organic traffic doubled about every six weeks from Oct 2017 to Mar 2018
- Several money keywords ranked on page one of Google and Bing
PPC, SEO, Social Media AdsFashion51-200 EmployeesN/ALos Angeles, CAN/A- Scaled while maintaining a high return on ad spend
- Pivoted from chef apparel to masks and back
- Channels: Google Ads, Facebook and Instagram ads, SEO, link building, native ads
SEO, Lead Generation, Web DesignMSP51-200 EmployeesN/AGoleta, CAN/A- $3.7M+ in lifetime revenue closed
- $1M+ billed directly from Jumpfactor leads
- 1,300x increase in search visibility
- $13,000 MRR deal closed
SEOSaaS501-1K EmployeesN/ASanta Clara, CAN/A- 365% increase in organic keywords
- 927% increase in organic traffic
- Domain Rating from 68 to 73
SEO, CROHealthcare10K+ EmployeesN/AOakland, CAN/A- 39% increase in YOY blog traffic
- 1,953% increase YOY in keyword traffic
- 928% increase in YOY website traffic
- 37% YoY increase in provider traffic
SEO, AEOFurniture11-50 EmployeesN/ASan Francisco, CAN/A- Average keyword rank improved from ~23 to 6
- 1,700+ AI search citations across Google AI Overviews, ChatGPT and Gemini
- #1 ranking for Futon Mattress
Web Design, SEOConsulting11-50 EmployeesN/AWalnut Creek, CAN/A- 2X increase in organic traffic
- 60% increase in search visibility
- 65% boost in engagement duration
- 18% higher engagement rate
SEO, Link BuildingB2B51-200 EmployeesN/ASan Jose, CAN/A- 1122% increase in conversions
- 87% increase in organic sessions
- 1400% increase in top 3 ranking keywords
PPC, Social Media Ads, SEOBeauty201-500 EmployeesN/AOakland, CAN/A- +63% impressions across paid channels YoY
- 31M video views from TikTok campaign in 90 days
- 548,000 new users to elfcosmetics.com in 90 days
- 300% increase in Share of Voice on Facebook
- +38% increase in orders on elfcosmetics.com
Content Marketing, SEORobotics11-50 EmployeesN/ABerkeley, CAN/A- 300M+ Press Reach Converted Into Demand Generation
- 1.27% Qualified Lead Conversion Rate (Organic Social)
- #1 Search Result for "Robotic Put Wall"
- 72 New Qualified Leads Generated
SEO, Web DesignHome Health1K-5K EmployeesN/ASan Diego, CAN/A- 151% Increase in GBP Views YoY
- 95% Increase in Total Organic Impressions
- 69% Increase in Total Organic Clicks
- 25% Increase in Total Keyword Rankings YoY
SEO, Web Design, Web DevelopmentLaw Firm11-50 EmployeesN/ALos Angeles, CAN/A- 114% Website Traffic Increase
- 96% Increase in Leads
- 3,606 Keyword Rankings (up from 1,908)
- 50% Organic Traffic Increase
- 56% Increase in Organic Goal Conversions
SEOMarketing51-200 EmployeesN/ALos Angeles, CAN/A- 300% ROI in 9 Months
- 742 Leads Generated (114 High-Quality MQLs)
- 1,549 Organic Backlinks Earned
- 160,000 Impressions Per Day
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