SEO agencies

GTU (Geek Town USA)

Metro Detroit agency (Pontiac) focused on multi-location and franchise brands, offering an Ongoing SEO + GEO service together with local marketing, development and paid media.

Hawaii Biz Marketing

Honolulu internet marketing service focused on local search visibility, Google Ads and lead follow-up for Oahu businesses, with its own Honolulu SEO and local SEO pages.

HB Freelance

Freelance ecommerce and technical SEO consultancy led by Hemanth Balaji in south-west London.

Helix SEO

Nashville SEO company that runs monthly SEO programs and an attorney-focused SEO program, serving clients nationwide.

Hennessey Digital

Law-firm marketing agency in the Los Angeles area offering SEO, GEO and PPC for personal injury, criminal defense and other practices.

Herdl

East Midlands marketing agency with offices in Ashby de la Zouch and Nottingham, running SEO campaigns in research, setup and ongoing phases with technical and link building work.

HexaGroup

Houston integrated marketing firm for energy and industrial companies, originally founded in France.

122.7% growth in positioned keywords and a 43.9% increase in organic traffic Houston SEO services results · agency-reported

HornTech

Auckland digital marketing agency selling SEO, Google Ads, Shopify development and AI-built websites, plus GEO/AIO work.

133 ranking keywords and 44 referring domains How One Auckland Retail Store Went from Zero Online to 133 Ranking Keywords · agency-reported

Horton Group

Nashville web design and digital marketing firm that sells SEO and AI search visibility work alongside websites, Google Ads and social media, delivered by an in-house team.

63% increase in web engagement and 100% of tracked keywords ranking in the top three search results for Harpeth Painting · agency-reported

Hozio

Long Island digital marketing agency with a New York City office.

312% organic traffic Local HVAC client organic traffic growth · agency-reported

Human Level

Long-established Spanish SEO/GEO consultancy near Alicante with a distributed team of around thirty consultants.

Hunters Digital

Singapore web design and digital marketing brand that runs a dedicated SEO programme covering technical audits, on-page work, content and backlinks, with e-commerce SEO, migration audits…

Hurrdat

Omaha media, marketing and entertainment company that says it is best known for SEO, web design and media production.

Iconier

Las Vegas digital agency with separate SEO pages for technical, local, national, ecommerce and AI search work, plus web and app design.

Ignite Digital

Mississauga digital marketing agency with dedicated SEO service pages for local, enterprise, national, ecommerce and B2B SEO.

Ignite SEO

London-based SEO-only agency founded by Adam Collins.

+200% organic traffic for Fleet Evolution · agency-reported

Ignite Visibility

San Diego full-service digital marketing agency with a large SEO practice aimed at franchise, multi-location and ecommerce brands.

+130% indexed pages The Technical SEO Audit That Increased Indexed Pages by 130% · agency-reported

Ignition Search

Sheffield performance-marketing agency offering SEO, paid ads, UX and content.

Imaginaire

Nottingham ecommerce agency that narrowed its focus to Shopify builds plus ecommerce SEO and PPC.

20% revenue growth in 3 months for Alert Electrical · agency-reported

Impossible Marketing

Locally owned Singapore digital agency with dedicated SEO, local, enterprise and AI SEO (GEO/AEO) pages, an SEO consultancy and training offer, and published indicative monthly prices.