The 17 Best SEO Companies in United Kingdom and United States (2025)

Best SEO Companies in the UK and US: A Comprehensive Guide

Search engine results are constantly evolving, and so should your digital marketing strategy.. Many of the best SEO companies specialise in tailored, data-driven approaches, making them key partners for businesses seeking to dominate the search landscape.

This list brings together the 17 best SEO companies, showcasing the unique expertise each brings to the table. Whether you’re a small business or a global enterprise, you’ll find the perfect partner for your SEO needs.

The 17 Best SEO (Search Engine Optimisation) Companies in the United Kingdom and United States (2024)

1. JBH 

• Best For: Performance-focused digital PR and SEO services
• Industries: Personal Finance, Direct-to-Consumer, Homes and Interiors
• Headquartered: United Kingdom — Offices in Manchester and London

JBH is a leading Digital PR and SEO agency renowned for enhancing organic visibility with tailored SEO services. Specialising in digital PR, they secure high-authority backlinks and boost search performance through data-driven campaigns. Their expertise covers technical SEO, on-site optimisation, and impactful link-building, all customised to industry-specific needs. JBH’s reputation as one of the best SEO companies is reinforced by appearances at major SEO conferences such as brightonSEO in the United Kingdom and brightonSEO San Diego, United States.

2. Studio Hawk

• Best For: Specialist SEO services with a focus on education and transparency
• Industries: Various sectors including B2B and B2C
• Headquartered: United Kingdom and Australia — London and Melbourne 

StudioHawk is a specialist SEO agency with offices in London and Melbourne, focusing exclusively on technical SEO, content strategy, and link-building. Their commitment to transparency and client education is evident in their Hawk Academy, which simplifies SEO concepts for clients. Recognised as the Best Global Large SEO Agency in 2021, they’ve established themselves among the best SEO companies. StudioHawk’s portfolio features diverse clients, including Grind, Wyse London, and The Fragrance Shop.

3. Dark Horse

• Best For: Customised digital marketing solutions
• Industries: Various sectors
• Headquartered: United Kingdom — Manchester

Dark Horse, a boutique digital marketing agency based in Manchester, offers bespoke solutions across SEO, PPC, and paid social. Their forensic approach to digital PR secures high-quality backlinks and media coverage, bolstering online authority and search rankings. Positioned as one of the best SEO companies for tailored strategies, they deliver results with integrity and a focus on holistic digital visibility.

4. Siege Media

• Best For: Content-driven SEO strategies
• Industries: Technology, Retail, Fintech, eCommerce, SaaS, Health
• Headquartered: United States — Remote with hubs in San Diego, California, and Austin, Texas

Siege Media is a content-focused SEO agency specialising in high-quality SEO content that drives organic traffic. Combining data-driven strategies with creativity, they collaborate with brands across sectors such as technology and retail. Their comprehensive services, including link-building and graphic design, position them as one of the best SEO companies for businesses.

5. Go Fish Digital

• Best For: Comprehensive digital marketing with a focus on SEO
• Industries: E-commerce, SaaS, Technology, B2B
• Headquartered: United States — Raleigh, North Carolina and Virginia, Maryland

Go Fish Digital, a US-based full-service digital marketing agency, delivers exceptional SEO results for major brands such as Geico, Marriott, Airbnb, and Adobe. Their expertise spans reputation management, link-building, and technical SEO. Recognised with multiple “Agency of the Year” awards and endorsed by Moz in 2021. Go Fish Digital is celebrated as one of the best SEO companies for businesses ranging from startups to global enterprises.

6. NP Digital

• Best For: Data-driven SEO strategies
• Industries: Technology, Entertainment and Fashion 
• Headquartered: United States — Las Vegas and global across North America, APAC, Europe, and LATAM

Founded by renowned marketer Neil Patel, NP Digital operates in the UK and US, offering enterprise-level SEO services, paid media solutions, and advanced analytics. Complemented by products like NP Accel and Ubersuggest, they provide cutting-edge tools for impactful results. Recognised as the Search & Performance Marketing Agency of the Year, NP Digital stands among the best SEO companies for data-driven strategies and scalable growth solutions.

7. The SEO Works

• Best For: SEO and Paid Search Services including PPC
• Industries: Healthcare, Legal, eCommerce
• Headquartered: United Kingdom — Sheffield

The SEO Works, a UK-based agency, specialises in SEO and PPC services, earning accolades such as the Global Search Awards. Trusted by brands like Just Eat, Decathlon, and the NHS, they focus on improving rankings, increasing traffic, and maximising ROI. As accredited Google Partners, they are one of the best SEO companies for delivering measurable results, particularly in the automotive, healthcare, and eCommerce sectors

8. iPullRank

• Best For: Advanced SEO techniques and innovative content marketing
• Industries: Enterprise-level businesses across various sectors
• Headquartered: United States

iPullRank combines advanced SEO techniques with innovative content marketing to serve enterprise clients. Their strengths include technical SEO, audience research, and performance analytics, making them a standout among the best SEO companies for complex projects. Accredited by Search Engine Land as “Search Marketer of the Year” and featured on Moz’s recommended list, iPullRank is led by Michael King, who has shared expertise at conferences like MozCon, SXSW, and brightonSEO.

9. WebFX

• Best For: Comprehensive digital marketing solutions
• Industries: Various sectors
• Headquartered: United States

WebFX is a US-based digital marketing agency offering end-to-end SEO services, PPC, CRO, and local SEO solutions. Known for their robust reporting tools, they’ve delivered tangible results for industries like manufacturing and eCommerce. With nearly three decades of experience, WebFX consistently ranks among the best SEO companies for driving impactful, measurable outcomes.

10. Ignite Visibility

• Best For: Performance marketing with a focus on SEO
• Industries: Various sectors
• Headquartered: United States

Ignite Visibility is a full-service digital marketing agency focusing on SEO, PPC, CRO, and digital PR. Their proprietary forecasting software, Certainly, and customised strategies make them a leader in the field. Known for innovative campaigns, Ignite Visibility is widely recognised as one of the best SEO companies for businesses of all sizes.

11. From The Future

• Best For: Advanced digital strategies and customer-centric experiences
• Industries: SaaS, eCommerce, Professional Services
• Headquartered: United States — Philadelphia, Pennsylvania

From The Future is a US-based digital strategy agency offering integrated SEO and content marketing services. Their expertise in keyword research, competitive analysis, and site architecture ensures top-tier results. Known for engaging audiences across the digital journey, From The Future is regarded as one of the best SEO companies for customer-centric strategies.

12. Click Slice

• Best For: ROI-focused SEO strategies
• Industries: Small to mid-sized businesses across various sectors
• Headquartered: United Kingdom — London

ClickSlice, a London-based SEO agency, delivers ROI-focused strategies for small to mid-sized businesses. Known for driving measurable outcomes, their approach has earned them a reputation as one of the best SEO companies for enhancing online presence and achieving tangible business results.

13. Connective3

• Best For: Data-driven SEO, digital PR, and content marketing
• Industries: Various sectors
• Headquartered: United Kingdom — Leeds, London, Manchester

Connective3 is a multi-award-winning agency specialising in SEO, digital PR, and content marketing. Leveraging data-driven strategies and creative campaigns, they’ve earned their place as one of the best SEO companies for delivering impactful results and fostering exceptional client relationships.

14. Journey Further

• Best For: Performance marketing with transparency and measurable results
• Industries: Various sectors
• Headquartered: United Kingdom

Journey Further, a UK-based performance marketing agency, offers technical SEO, high-impact content strategies, and transparency-focused services. Trusted by brands seeking measurable results, they are positioned as one of the best SEO companies for clear and results-driven communication.

15. Whitworth SEO 

• Best For: Bespoke SEO solutions for small businesses
• Industries: eCommerce, Property and Fashion
• Headquartered: United Kingdom — Manchester

Whitworth SEO, based in Manchester, delivers personalised SEO solutions tailored to small businesses. Led by Charlie Whitworth, with over 15 years of experience, the agency excels in local SEO, technical SEO and content strategy, including customised strategies using the RARER methodology. 

16. Megantic

• Best For: eCommerce-focused organic search strategies
• Industries: eCommerce
• Headquartered: Australia — Melbourne

Megantic is an eCommerce SEO specialist agency with a global presence, including the UK. Their unique approach targets informed online shoppers often overlooked by traditional campaigns. As one of the best SEO companies for eCommerce, Megantic’s tailored strategies deliver unparalleled results for online retailers.

17. SEO+

• Best For: Cost-effective SEO solutions for SMEs
• Industries: Small and medium-sized enterprises
• Headquartered: United Kingdom — Devon

SEO+ provides a range of cost-effective SEO services, from technical SEO to content marketing, focusing on SMEs. Known for their ethical SEO, they are one of the best SEO companies for regional businesses aiming to grow their online visibility.

The best SEO companies typically have similar characteristics, but it’s essential to do thorough research amongst agencies to understand if an agency is the right fit for your business. 

What Makes A Top SEO Company?

When selecting an SEO agency, it is essential to understand what distinguishes the best from the rest. A top SEO company consistently demonstrates expertise, reliability, and a commitment to delivering measurable results. Here are the key traits that define the best SEO companies:

• Proven Expertise in SEO: Top agencies excel in mastering search engine algorithms, on-page and off-page SEO, technical optimisation, and content strategy. They stay updated with industry trends and adapt to search engine updates, keeping clients ahead of the competition.
• Customised Strategies: Leading agencies develop tailored plans by analysing your business, industry, and audience, ensuring a high ROI and sustainable growth.
• Transparent Reporting: Clear communication defines the best agencies. They provide detailed reports on campaign performance, keyword rankings, organic traffic, and other key metrics to demonstrate value.
• Industry Recognition: Awards, certifications, and accolades validate the expertise and standing of top agencies in digital marketing.
• Holistic Approach: Beyond rankings, leading agencies focus on enhancing user experience, boosting conversion rates, and aligning SEO with broader marketing goals.

• Niche Specialisation: Some agencies excel in specific industries, such as eCommerce, healthcare, or SaaS, developing targeted strategies that deeply resonate with niche audiences.

How to Choose the Best SEO Company for Small Businesses

Finding the right SEO agency can feel overwhelming, but focusing on key factors can simplify the process:

• Define Goals: Clarify your objectives, such as boosting organic traffic, improving local search visibility, or optimising your eCommerce store. This will help you identify agencies with the relevant expertise.
• Research Agencies: Compile a shortlist using reviews, recommendations, and online research. Prioritise agencies with a proven track record in your industry or with similar business types.
• Evaluate Portfolios: Review case studies, testimonials, and measurable results, such as increased traffic or improved rankings, that align with your objectives.
• Ask Key Questions: Delve into their methods, tools, and reporting practices. Questions like “How do you approach link building?” can help assess their expertise and transparency.
• Ensure Customisation: Look for agencies offering tailored strategies that reflect an understanding of your business needs and goals.
• Assess Communication: Choose agencies that prioritise clear and responsive communication to ensure a seamless and productive partnership.

Conclusion

Choosing the right SEO agency is vital for achieving digital marketing goals, whether you’re a small business seeking local visibility or a global brand targeting enterprise-level success.

At JBH, we deliver measurable results through data-driven strategies, seamlessly combining digital PR with innovative SEO techniques. Our award-winning team helps brands dominate local search, scale globally, and attract high-value organic traffic, ensuring success for your business.