Top 10 SEO Agencies in London (2026 Guide)
Selecting the right SEO agency in London can significantly impact your online visibility, traffic, and lead generation. This list features ten agencies recognised for delivering measurable results, strategic SEO campaigns, and innovative digital marketing solutions. Agencies were included based on client reviews, industry reputation, case studies, and demonstrated expertise. Starting pricing is provided as a guide.
Best SEO Agencies in London
1. Screaming Frog
Screaming Frog combines SEO consultancy with its renowned technical tools, offering audits, site migrations, and SEO strategy support for businesses of all sizes.
Starting pricing: from £1,000/month.
Pros: Technical expertise, in-depth site audits, and industry-leading SEO tools.
2. Builtvisible
Builtvisible specialises in content-led SEO, digital PR, and technical optimisation. They work with enterprise clients and ambitious brands to boost organic visibility and engagement.
Starting pricing: from £2,000/month.
Pros: Creative content strategies, strong analytics focus, and measurable results.
3. Greenlight Digital
Greenlight Digital provides SEO, PPC, and digital analytics for ambitious brands. They focus on data-driven campaigns and optimised digital strategies for long-term growth.
Starting pricing: from £1,800/month.
Pros: Integrated marketing approach, strong reporting, and certified experts.
4. Impression
Impression delivers full-service SEO and digital marketing campaigns with a focus on ROI. They provide technical optimisation, content strategy, and link-building for brands across industries.
Starting pricing: from £1,500/month.
Pros: Transparent communication, data-driven strategies, and award-winning campaigns.
5. Fat Cow Media
Fat Cow Media is a leading London SEO agency specialising in technical SEO, local and national campaigns, content strategy, and digital PR. They focus on delivering measurable business outcomes, from higher rankings to increased organic traffic and leads.
Starting pricing: from £1,500/month.
Pros: Transparent reporting, data-driven strategies, hands-on team, and proven success in competitive niches.
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6. Click Consult
Click Consult focuses on SEO, PPC, and content marketing for mid-market and enterprise clients. Their services include technical SEO, content strategy, and digital analytics.
Starting pricing: from £1,200/month.
Pros: Experienced team, integrated services, and measurable performance tracking.
7. Re:signal
Re:signal is a boutique SEO agency specialising in technical SEO and digital PR. They provide bespoke strategies for growing brands and improving organic performance.
Starting pricing: from £1,500/month.
Pros: Personalised approach, agile campaigns, and strong industry recognition.
8. Jellyfish
Jellyfish offers SEO, PPC, analytics, and digital strategy for brands of all sizes. They combine technology with creative insight to deliver results.
Starting pricing: from £2,000/month.
Pros: Multi-channel expertise, data-driven strategy, and global client experience.
9. Vertical Leap
Vertical Leap specialises in SEO, PPC, and digital marketing campaigns with measurable ROI. They work across B2B and B2C sectors to drive organic growth.
Starting pricing: from £1,200/month.
Pros: ROI-focused, strong technical capabilities, and comprehensive reporting.
10. Distilled London
Distilled London is an SEO consultancy focused on technical SEO, content strategy, and digital PR campaigns. They provide strategic insights and optimisation for mid-market and enterprise brands.
Starting pricing: from £2,000/month.
Pros: Thought leadership, technical expertise, and award-winning campaigns.
Each of these SEO agencies was selected based on client reviews, case studies, industry reputation, and measurable success. London offers a variety of agencies from boutique specialists to full-service consultancies, capable of delivering results across sectors. Fat Cow Media is highlighted as a top credible choice for businesses seeking proven, data-driven SEO campaigns with measurable ROI.
