Best SEO Agencies in 2026

Seer Interactive is a US digital marketing agency founded in 2002 by Wil Reynolds, who started it as a one-person operation after leaving an employer that objected to him taking time off to volunteer. The agency describes more than 250 full-time staff, contractors, part-timers and interns, and states that it works with more than 130 enterprise clients with a 92% retention rate.

Seer's services span organic search, generative engine optimisation (GEO), paid media, analytics, creative and conversion-rate optimisation, and it sells AI consulting under the SeerAdvance name alongside in-house research products called SeerSignals and SeerSonar. It markets itself as an agency known for AI research and development applied to search, and it is a Certified B Corp, a third-party certification of social and environmental practices. Its combination of SEO with analytics and paid media suits enterprises that want organic and paid search planned together and measured in one model. Seer does not publish fees, and its enterprise focus, implied by its stated client base, means smaller businesses with modest budgets are not its core market. The founder's long public profile in the SEO community gives the agency visibility in industry events and research, but buyers should evaluate the specific team assigned to their account.

Brainlabs is a performance marketing agency founded in 2012 by Dan Gilbert, who left a role at Google to start it. The agency says it has grown from two people in 2012 to more than 1,000 staff, whom it calls Brainlabbers, across five continents, and it describes itself as the fastest-growing independent agency. It cites recognition from AdWeek as Breakthrough Agency of the Year and multiple mentions by Ad Age.

Brainlabs emphasises a scientific, test-driven approach: it says it has deployed AI in advertising since 2012 and keeps a repository of more than 2,500 logged experiments, called Hippocampus, to inform client work. SEO is one discipline within a broader performance offer that includes paid search, paid social and data work, so it suits large advertisers who want organic search managed alongside paid channels by the same agency. The scale and global footprint support multi-market programmes. The agency does not publish its fees, and buyers looking for a specialist that does only SEO, or a small agency with senior-level attention on a modest budget, may find better fits among the boutiques in this list.

Victorious is a search-focused agency founded in 2013 that began as a broader marketing agency and made what it calls a hard pivot to SEO alone in 2016. It states 13 years of search-only focus, more than 1,050 brands served and five Search Agency of the Year titles. Its leadership team includes chief executive Michael Transon.

Services are grouped into search and AI visibility, content and web. Answer engine optimisation (AEO) covers visibility in ChatGPT, Perplexity, Google AI Overviews, Gemini, Copilot and Claude; content services include content marketing and SEO copywriting; SEO services include on-page SEO, keyword research, audits, migrations, off-page SEO and link building, and technical SEO; and web services include managed hosting. The agency also publishes quarterly search research, such as a Q3 2026 report on how AI recommends brands it already cites. The single-channel focus suits companies that want a specialist rather than a full-service partner. Victorious does not publish its fees, and companies that need paid media or social managed by the same supplier will need another agency.

iPullRank is an SEO and AI-search agency founded by Mike King, whom the agency describes as Search Engine Land's Marketer of the Year. It states that it is a Black-owned business, and King says he founded it because he saw a disconnect between how agencies operate and what clients need, criticising the common practice of billing by the hour, which he argues rewards visible activity over results.

The agency positions itself for enterprise and mid-market clients and lists services including relevance engineering, resonance design, generative engine optimisation (GEO), AI search strategy, agentic marketing, technical SEO, content engineering and generative AI. It publishes an AI Search Manual and runs an event, with an edition announced for 6–8 April 2027 in New York. iPullRank's strength is technical depth, particularly in how search and AI retrieval systems work, which suits companies with complex sites or engineering teams that want rigorous recommendations. It does not publish fees, and its research-heavy approach may be more than a small local business needs.

Siege Media is a content-led SEO agency founded and led by chief executive Ross Hudgens, with offices in Austin, Chicago and New York City. It describes itself as a team of creatives, marketers and search specialists helping brands build visibility both in search engines and in large language models.

The agency estimates that its work accounts for about US$12.4 million a month in client traffic value, or roughly US$148.6 million a year, a figure calculated by the agency itself. Its services range from content creation and design to distribution, affiliate and technical consulting. Hudgens is the author of a book on generative engine optimisation published by Wiley, which the agency presents as the basis for its approach to ranking and being cited in AI search. Siege's model suits companies, often software and consumer brands, that grow through large libraries of search-targeted content and linkable assets. Its emphasis on content production means companies needing mainly technical fixes or local SEO may be better served elsewhere, and the agency does not publish pricing.

WebFX is a US digital marketing agency headquartered at 1705 North Front Street in Harrisburg, Pennsylvania, with a regional hub in Lancaster. It says it is celebrating 30 years in digital marketing and has 750 experts on staff. The agency publishes running totals of results it attributes to its work, including more than 24.8 million leads and more than US$10 billion in revenue driven for clients, figures it calculates itself.

WebFX describes its services as getting brands seen in search and AI answers, generating qualified leads that pass into clients' CRM systems, and reporting through dashboards backed by consulting, and it positions itself on revenue measurement rather than traffic metrics. It is one of the few agencies that publishes detailed pricing guidance: its SEO cost guide states that SEO typically costs US$1,000 to US$5,000 a month on retainer, US$75 to US$200 an hour for consulting and US$500 to US$5,000 per project, and that most businesses spend about US$2,500 a month. Its scale and process suit small and mid-sized businesses that want a predictable, packaged service. Buyers seeking senior specialist attention on complex enterprise sites may prefer a boutique, and as a full-service agency SEO is one of many offerings.

Impression is a UK performance marketing agency founded in Nottingham as a small team of developers and creative marketers, and now operating offices in Nottingham, London, Manchester and New York. It holds workplace certifications including Great Place to Work recognition and listings among the UK's best workplaces for women and for wellbeing.

SEO services include SEO consultancy, e-commerce SEO, technical SEO, international SEO and generative engine optimisation, and they sit beside digital strategy, paid search and paid social, programmatic, Google Shopping, digital PR, brand PR, organic social, influencer marketing, analytics, conversion-rate optimisation and behavioural science. The agency also advises on in-housing, helping clients build internal capability. Its sector pages cover e-commerce, B2B, SaaS, fintech and sustainable brands. The combination of technical SEO with digital PR suits brands that need both on-site work and authority building through press coverage. Impression does not publish fees, and its founding date is not stated on its about page.

Ignite Visibility is a digital marketing agency founded in 2013 by John Lincoln and Krishnan Coughran, headquartered in San Diego with offices in Irvine, New York and Orlando and a remote-first team. Coughran leads the company as chief executive and Lincoln serves as executive chairman.

In February 2023 the agency partnered with the private-equity firm Mountaingate Capital to accelerate growth, and it has since made acquisitions: Integrated Digital Strategies in December 2023, which deepened its franchise-marketing expertise, and Outliant in April 2025, which added web capabilities. Ignite describes its offer as an integrated platform rather than disconnected vendor tools, combining SEO with paid media, social and web work. Its franchise-marketing experience makes it relevant to multi-location brands that need local SEO at scale. As a private-equity-backed, acquisitive group, its structure and service lines may continue to change, and SEO is one component of a wider offer. Fees are not published.

NP Digital is a digital marketing agency co-founded in 2017 by Neil Patel, an author and marketer whose profile the agency highlights through mentions in The Wall Street Journal and Forbes. It describes a global team, with employees working from many locations, and services spanning SEO, paid media, content, data and analytics, dashboard development and conversion-rate optimisation.

Its stated culture emphasises employee autonomy under an "Own It" principle and hiring regardless of location. NP Digital suits companies that want an agency with a well-known founder and the ability to combine SEO with paid media and analytics across several countries. Because the founder is a public figure, prospective clients should distinguish the agency's delivery teams from the founder's personal publishing when assessing capability, and ask for case studies in their own sector. Specific office locations, staff numbers and fees were not available on the pages reviewed, and buyers should confirm the delivery team and market coverage for their region during scoping.

Screaming Frog is a UK search-marketing agency founded in 2010 and based in Henley-on-Thames, Oxfordshire, serving companies worldwide. It is also the developer of the SEO Spider, a website crawler used for technical audits, which gives the agency an unusually close connection between its consulting and its own software.

The agency's services include search engine optimisation, technical SEO, AI search optimisation, pay-per-click management, paid social, content marketing and digital PR. It describes its team as bringing experience from within SEO and PPC and emphasises service delivered through clear communication. Its technical heritage suits site migrations, large-site audits and international or JavaScript-heavy sites where crawl analysis is central. The SEO Spider itself is sold separately at £199 per user per year, with volume discounts for five or more licences, so clients can run the same crawler internally between agency engagements. As a UK agency, its main operating base is in Oxfordshire, which may matter for clients wanting local, in-person account management in other regions. Fees are not published.

Rise at Seven is a search-first creative agency that describes itself as a team of organic media planners and serves clients from three offices in Manchester, London and New York. It frames its work as creating category leaders on every searchable platform, combining SEO with social, digital PR and visibility in AI and large-language-model search.

The agency describes two main aims for clients: defending their position in the market through technical and content work on their own sites, and growing into new demand. Its featured work includes SEO for the car-rental company SIXT from 2023 to 2025, which it credits with an extra 3 million clicks regionally, and B2B work for the card-machine provider Dojo from 2021 to 2025. The site also lists work for PrettyLittleThing. Rise at Seven's PR-led approach to search suits consumer brands that want campaigns earning links and coverage as well as rankings. Its founding year, headcount and fees are not published on the pages reviewed, and its creative focus may be more than B2B firms with technical needs require.

Go Fish Digital is a US digital marketing agency with an address at 150 Fayetteville Street in Raleigh, North Carolina, and offices listed in Boston, Washington DC, Phoenix, Raleigh, San Diego and Jacksonville. It offers SEO and related search services alongside creative and design work, with industry pages for technology and other sectors.

The agency publishes client testimonials naming its clients, including a marketing executive at Chicco USA describing the team as hands-on. Its creative team, led by an executive vice-president and creative director, produces brand and campaign work that supports content-led SEO. The spread of US offices makes it a practical choice for American mid-market companies that want an agency with both technical search capability and in-house design. Founding year, headcount and fees are not stated on the pages reviewed, and its presence outside the United States is limited, so multinational programmes would need partners.