Best SEO Agencies in the United States (2026) – Ranked by Case Studies
SEO
AI
11-50 Employees
N/A
Jersey City, NJ
N/A- 188% Increase in Goal Completions
- 197% Increase in Conversion Rate
- 31% Increase in Organic Impressions
SEODating App11-50 EmployeesN/ASanta Monica, CAN/A- 1,491 Increase in Total Target Keyword Positions
- 55% Increase in Unbranded Keyword Clicks
- 33% Increase in Goal Completions
SEOEducation201-500 EmployeesN/ASan Francisco, CAN/A- 1,000% Increase in Target Page Organic Traffic
- 1M+ Monthly Organic Search Visitors
- 13% Increase in Organic Traffic
SEORetail1K-5K EmployeesN/AAtlanta, GAN/A- 120 Keywords with First-Page Rankings
- 41% Increase in Website Traffic
- 31% Increase in Page Views
SEOMed Spa201-500 EmployeesN/AAtlanta, GAN/A- 1,217% Increase in Online Appointment Bookings from Organic Search
- 60% Increase in Phone Calls from Organic Search
- 10% Increase in Organic Website Visitation
SEOInfusion Therapy501-1K EmployeesN/ABrentwood, TNN/A- 356% Growth in Total Keyword Rankings YoY
- 130% Growth in Top 10 Keyword Rankings YoY
- 58% Increase in Organic Conversion Rate
SEOVeterinary1K-5K EmployeesN/AWorthington, OHN/A- $115K Monthly Traffic Value Rebound in 6 Months
- 2,302 Links
- 136K Monthly Organic Traffic Rebound in 6 Months
SEOSaaS501-1K EmployeesN/ACharlotte, NCN/A- 63% Increase in Organic Traffic Value
- 52% Increase in Organic Form Submissions to Siege Media-Created Content
- 53.8K Impressions From Siege Media-Created Content
Content Marketing, SEOEcommerce51-200 EmployeesN/ABrooklyn, NYN/A- 323% Increase in Traffic Value to Blog in Six Months
- 400% Increase in Organic Traffic to Blog Within One Year
- Top Traffic Attributed to Siege-Generated Content
SEOSaaS501-1K EmployeesN/ASan Francisco, CAN/A- 1200+ organic users generated monthly since March
- $30000+ in traffic value over 6 months
Content Marketing, SEOSaaS11-50 EmployeesN/ACambridge, MAN/A- 102% increase in time on site
- 80% decrease in customer acquisition costs
- 25% increase in pages per session
- 1000+ eBook downloads
Content Marketing, SEOInsurance51-200 EmployeesN/AMaitland, FLN/A- 3x total organic keyword rankings on blog in 2020
- 26 new referring domains in 2020
- 14% increase in blog sessions in 6 months
- 9% increase in new users in 6 months
SEOFinance11-50 EmployeesN/ABoynton Beach, FLN/A- 138% Increase in Organic Users
- 126% Increase in Engaged Sessions
- 104% Increase in Sessions
- 22% Increase in Overall Clicks
- 47% Increase in Conversions (peak)
SEOManufacturing1-10 EmployeesN/ASouthlake, TXN/A- +78% Increase in Conversions
- +8.5% Conversion Rate
- +137% Conversions on the pricing page
- 180 sessions from AI search
- 28 Google AI Overview appearances (up from 8)
SEOLaw Firm1-10 EmployeesN/AMiami Beach, FLN/A- 72% increase in conversions
- 50% increase in conversion rate
- 8% increase in sessions
SEOFood & BeverageN/AN/ACanton, MIN/A- Clicks up from about 5.42K to 11.3K
- Impressions up from about 192K to 760K
- Average position improved from about 17.2 to 10.9
- Users up 17.77%, from 8,833 to 10,403
- Sessions up 15.73%, from 13,098 to 15,158
SEOSelf-StorageN/AN/ASouthfield, MIN/A- Clicks up from about 132 to 156
- Impressions up from about 29.7K to 33.6K
- Average CTR up from about 0.4% to 0.7%
- Average position improved from about 30.2 to 29
SEOHome ServicesN/AN/AWestland, MIN/A- Clicks up from about 780 to 997
- Impressions up from about 61.9K to 77.4K
- Average CTR up from about 1.7% to 2.1%
- Average position improved from about 34 to 31.3
SEOFashion11-50 EmployeesN/ASeattle, WAN/A- 175% Jump in Page One Search Rankings
- 51% Rise in New Sessions and Users
- 50% Increase in Organic Revenue
PPC, SEOSaaS51-200 EmployeesN/ASan Jose, CAN/A- 3x Increase in Page One Google Keywords (15 to 53)
- 231% Increase in Organic Sessions
- 227% Increase in New Users
- 30% Increase in Organic-Assisted Conversions
- $55 Decrease in CPA MoM
SEO, Content Marketing, Public RelationsHealthcare51-200 EmployeesN/ASan Francisco, CAN/A- 45,400 Additional Keywords Gained
- 5,214% Increase in Keywords Ranking Positions 1-3
- 862% Increase in Organic Sessions
- 32% Campaign ROI
SEODentalN/AN/AHollywood, CAN/A- 89% increase in organic traffic in 6 months
- 95% growth in organic page views
- 60% increase in organic sessions
- First-page rankings within 3-9 months
SEOPlastic SurgeryN/AN/AVenice, CAN/A- 343% increase in organic traffic
- 250% increase in page views in 3 months
- 73% of keywords ranked in the top 10
- Organic leads grew 4x in 5 months
SEOPlastic SurgeryN/AN/AVenice, CAN/A- 55% increase in organic traffic in 4.5 months
- 78% of keywords ranked at the top of results
- 83% growth in organic lead volume
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
SEO, Content MarketingEcommerceN/AN/AAmherst, NYN/A- 268% Increase in Clicks
- 125% Improvement in CTR (0.48% to 1.08%)
- 11.7% Improvement in Average Search Position
SEO, Content MarketingEcommerceN/AN/AAmherst, NYN/A- 325% Increase in CTR (0.8% to 3.4%)
- 184,000 Impressions
- 1,123 Keywords Ranking (445 in Top 10)
- 105 Product Cart Adds Per Month
SEOWellness201-500 EmployeesN/ASan Francisco, CAN/A- 36% growth in organic installs within 6 months
- 684% increase in keywords ranked in top 15 positions
- 521% increase in cumulative traffic
- Top 10 ranking in Health & Fitness category
SEOPublishing1K-5K EmployeesN/ASan Francisco, CAN/A- Over 90% increase in organic downloads in under a year
- 700+ phrases indexed in App Store top 5 rankings
SEORide-Hailing10K+ EmployeesN/ASan Francisco, CAN/A- 27% growth in organic downloads in 90 days
- Keyword strategy across 10 languages
Local SEO, SEOHome ServicesN/AN/ASouthlake, TXN/A- #1 for Southlake window replacement searches
- 180+ five-star Google reviews
- 10 geo area pages and 8 service pages ranking
Local SEO, SEOHome ServicesN/AN/ACrockett, TXN/A- #1 Crockett roofing contractor in local maps
- 10 area pages ranking across East Texas communities
- 5 Google reviews published, all 5-star
Local SEO, SEOLegal ServicesN/AN/ADallas, TXN/A- #1 local pack rankings in multiple DFW cities across 5 offices and 4 counties
- All 5 Google Business Profiles built out, optimized and generating reviews
- Dedicated location pages for Dallas, Fort Worth, Arlington, McKinney and Denton
SEO, Web Design, Web DevelopmentEntertainment11-50 EmployeesN/ANew York, NYN/A- +74% Increase in Sales Lead
- +82% Increase Time on Site
Branding, Web Development, Web Design, SEOManufacturing201-500 EmployeesN/APort Washington, NYN/A- 98% Increase in backlinks
- 528 Keywords ranked on Google
- 925 Backlinks created
Branding, Web Development, Web Design, SEONon ProfitN/AN/APhoenix, AZN/A- 14% Increase In Average Time On Site
- 4% Growth of User Engagement
- 22% Surge of Engagement Per User
SEOFitness11-50 EmployeesN/AMill Creek, WAN/A- +61% increase in organic transactions
- +63% increase in organic revenue
- +189% increase in organic traffic
SEOFintech1K-5K EmployeesN/ASan Francisco, CAN/A- +800% conversion rate
- +$44K new organic conversions
SEOFintech11-50 EmployeesN/ANew York, NYN/A- 230% increase in monthly organic traffic
- 88% increase in domain authority
- 736% increase in impressions
- 290% increase in organic conversions
SEO, Reputation ManagementPelvic Care1-10 EmployeesN/ASanta Rosa, CAN/A- 345% increase in organic traffic
- 57% increase in goal completions
- 100% attribution measured
SEO, CROFurniture1-10 EmployeesN/AQueens, NYN/A- 1,347% increase in monthly organic traffic
- 534% increase in SEO-attributed revenue
- 766% increase in organic conversion rate
- 61% increase in average order value
SEORestaurantN/AN/AIssaquah, WAN/A- Page-one rankings grew from 10 to 29
- Average keyword position improved from #44 to #8
- Search impressions +31% year over year
SEOTravelN/AN/AJuneau, AKN/A- Organic sessions up 2,826% in year one (144 to 4,213)
- Organic sessions +51% in year two to 6,363
- Average session duration +531% (1:05 to 6:54)
SEOMoving1-10 EmployeesN/ASarasota, FLN/A- Keywords in the top 3 grew from 35 to 76 (+217%)
- Keywords in positions 4-10 +170%
SEOPublic Records51-200 EmployeesN/ASacramento, CAN/A- 103% More Impressions on Priority Pages
- 83% Increase in Reverse-Phone Clicks
- New Rankings for High-Volume Queries
SEOEcommerce51-200 EmployeesN/APoway, CAN/A- 87% Average Position Improvement on Collection Pages
- 33% Increase in Non-Branded Impressions
- AI Referral Traffic Grew From 1,700 to 5,000 YoY
Public Relations, SEOMedical51-200 EmployeesN/ASalt Lake City, UTN/A- 271 Earned Links From a Single Media Blitz
- 400% Increase in Incontinence Page Clicks YoY
- 231% Increase in Homepage Impressions YoY
SEOFinance11-50 EmployeesN/ANewport Beach, CAN/A- 22% Increase in Organic Traffic
- 75% Increase in Organic Leads
SEOSaaS51-200 EmployeesN/ANew York, NYN/A- 1st Page Google Ranking
- 176% Increase in Organic Traffic
SEOLab Equipment11-50 EmployeesN/ASan Francisco, CAN/A- 1,512% Increase in Conversions
- 702% Increase in Organic Traffic
SEOTelecom10K+ EmployeesN/AStamford, CTN/A- Organic traffic value from $11M to $23.6M per month
- +43% page-one rankings and +49% click-through rate
- +26% organic traffic
- 100+ employees trained on SEO best practices
- 95% of link value retained through website consolidation
SEOConsulting51-200 EmployeesN/ALos Angeles, CAN/A- Total impressions +120% since the campaign start (after a Google update drop)
- First-page keyword presence more than doubled
- Top-10 keywords from about 8 to 28
SEO, Content MarketingAI51-200 EmployeesN/ASan Francisco, CAN/A- Goal conversions from 10 to 183 per month (+1,730%)
- Keywords on page 1 from 20 to 172 (+760% first-page rankings)
- +345% monthly impressions
- +94% website clicks from Google
Amazon Marketing, SEOFood & Beverage1-10 EmployeesN/AHillsboro, WIN/A- 167% increase in total Amazon sales YoY (ads + organic)
- 23% increase in revenue
- 27% lift in impressions for branded keywords
PPC, SEOSporting Goods11-50 EmployeesN/AWinchester, KYN/A- 500% increase in sales
- 1,200% ROAS
- 10 target states added
PPC, Social Media Ads, SEOConsulting51-200 EmployeesN/AArlington, VAN/A- 400% increase in lead volume within 6 months
- 100% increase in lead volume by month four without increasing budget
- 50% increase in lead volume and quality in two months
SEOIndustrial11-50 EmployeesN/ACresskill, NJN/A- 170% Increase in total site traffic
- 218% Increase in organic search traffic
SEOIndustrial51-200 EmployeesN/AJeffersontown, KYN/A- 2420% Increase in organic search traffic
- 44% Decrease in organic traffic bounce rate
SEORetail11-50 EmployeesN/APlainfield, NJN/A- 94% Increase in organic search traffic
- 40% Increase in page views
SEOReal Estate1-10 EmployeesN/AAtlanta, GAN/A- 185 Organic Leads
- 5 First Page Rankings for Non-Branded Keywords
- 103 New Google Keywords
SEOFood & Beverage11-50 EmployeesN/ALong Island City, NYN/A- 136 Current First Page Rankings (up From 26)
- 2,000 New Google Keywords
- $302,375.59 Revenue From Organic Traffic
SEORetail1-10 EmployeesN/AMarlton, NJN/A- 314 Current First Page Rankings (up From 185)
- 300 New Google Keywords
SEOLaw FirmN/AN/AOrlando, FLN/A- Top positions in Google for workers' compensation keywords
SEO, Web DesignLaw FirmN/AN/AMiami, FLN/A- Traffic and leads +500%
- #1 in Google for 10 medical malpractice search terms
- 1,000+ net Google ranking positions gained in one year
- Local call volume +900% since launch
SEO, Web DesignLaw FirmN/AN/ANew York, NYN/A- $50M in settlements won from website leads
- #1 Google position for top search keywords
- Multi-million dollar medical malpractice cases +300%
- 8-year client; 2014 Best in Class Interactive Media Award
SEO, Content MarketingLaw FirmN/AN/ASt. Louis, MON/A- Focus keywords on page 1 of Google: 28.4% to 88.5% in 2023
- Organic users +718.99% YoY
- Form completions +616% YoY (25 to 179)
- Car accident pillar page impressions: 290,876 to 1,530,879
Web Design, Web Development, SEOLaw FirmN/AN/ASt. Louis, MON/A- Rebuilt site with improved navigation and clear calls to action
- CMS that makes content updates seamless
- Improved on-site SEO
Web Design, Branding, SEOFood & BeverageN/AN/ASt. Louis, MON/A- New site built to support expansion into new markets
- Recipe pages restructured so they can be indexed
- Schema markup built in during development
SEOAgriculture51-200 EmployeesN/ALehi, UTN/A- 741% increase in revenue
- 366% increase in referring pages
- 300% increase in ecommerce conversion rate
- 126% increase in referring domains
SEOHome Health51-200 EmployeesN/ARichmond, VAN/A- 238% increase in organic sessions
- 135% increase in keywords on page 1
- 125% increase in keywords ranking in top 3
- 281% increase in referring domains
SEOFashion11-50 EmployeesN/ARidgefield, WAN/A- 1839% return on investment
- 56.50% increase in organic sessions
- 335.13% increase in keywords ranking #1-3
- 45.95% increase in revenue
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/APoulsbo, WAN/A- Web-form leads up 129% in the first 28 days
- Search clicks up 20% and Google Maps impressions up 56%
- 1,547 pages live, 1,057 of them educational
Web Development, SEOHome ServicesN/AN/ASarasota, FLN/A- Hit #1 on Google within one week of launch
- Organic traffic up 3,240%
- Live about 30 days after a domain crisis, with 600+ indexed pages across 6 FL markets
Web Development, SEONon Profit51-200 EmployeesN/ADes Moines, IAN/A- 158 events listed in 2024
- 20K active users in 2024
- 33% of traffic from organic search
Web Development, SEO, PPCSenior CareN/AN/ABel Aire, KSN/A- 268% organic clicks increase
- 723,000 search impressions increase
- 168% total views increase
Web Development, Branding, SEORetailN/AN/AWichita, KSN/A- 85% increase in online sales
- 33,975 Facebook reach in 6 months
- 51% average email open rate
- 35% increase in brand engagement
SEOIndustrial51-200 EmployeesN/AMiami, FLN/A- Recovered from a 65% organic traffic loss
- 300% revenue increase
SEORetail11-50 EmployeesN/AKeokuk, IAN/A- Tripled page-one keyword coverage
- Revived organic revenue in a seasonal market
SEOSporting Goods1-10 EmployeesN/ASidney, NEN/A- 50+ first-page rankings
- 60% year-over-year revenue increase
SEO, Content MarketingFood & Beverage11-50 EmployeesN/ASanta Monica, CAN/A- 278,000 total organic banana recipes sessions
- 41% increase in total organic sessions MoM
- 75,000+ organic sessions in first two weeks after posting
- 275,000+ organic sessions ~1.5 months after publishing
- 23.8% initial decline in organic sessions from COVID stay-at-home orders
PPC, SEO, Content MarketingPersonalized Gifts51-200 EmployeesN/AAustin, TXN/A- 25% lower CPA
- CPA equal to 10% of predicted 12-month customer spend
- 35% increase in organic traffic
SEO, Content Marketing, CRORetail1K-5K EmployeesN/ALos Angeles, CAN/A- 54% increase in organic search traffic
- 94% increase in revenue via on-site optimization
- 61% increase in organic search transactions
SEO, Technical SEOTravel51-200 EmployeesN/ALas Vegas, NVN/A- 2,000% Increase in 1st Place Rankings
- 2,500% Increase in Top 5 Rankings
- 2,100% Increase in Top 10 Rankings
SEO, Technical SEOEcommerce201-500 EmployeesN/AMiami, FLN/A- Top 10 Rankings for 4 Major Keywords, Boat Loans, Insurance, Warranty, and Shipping
- Maintained #1 Ranking for 'Boats'
SEO, Technical SEOPublishingN/AN/AIrvine, CAN/A- 2M to 7M Increase in Monthly Visits
- $2M/Month in Organic Revenue
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
SEOFashion1-10 EmployeesN/AMontclair, NJN/A- 859% year-over-year increase in organic clicks (427 to 4,093)
- 11,000+ organic clicks
SEOFashion51-200 EmployeesN/AChatsworth, CAN/A- Page 1 on Google above Victoria's Secret in 90 days
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