Top SEO Agencies in London

SEO Agencies in London: compare 10 agencies, ranked by verified client reviews.

10 agencies listed Updated

Ranked by verified client reviews: each agency’s average rating, weighed against how many reviews it has. Agencies without reviews follow, ordered by their Google Maps rating when there is one. Agencies pay a one-time fee to be listed. Payment never affects their rank or their reviews. How we rank

Delante

No reviews yet

International SEO, SEM & AI Search Agency for Scalable Growth Worldwide

Min. project size
Not listed
Hourly rate
$50–$99 / hr
Team size
50–249 employees
Headquarters
Kraków, Poland

Service focus

  • SEO 58%
  • Digital Marketing 14%
  • AI 10%
  • Generative Engine Optimization 9%

Elit-web

No reviews yet

Performance-Driven Digital Marketing Agency

Min. project size
$1,000+
Hourly rate
$25–$49 / hr
Team size
50–249 employees
Headquarters
Schaumburg, United States

Service focus

  • SEO 25%
  • Social Media Marketing 25%
  • Generative Engine Optimization 25%
  • PPC 25%

SEO Agencies in London at a glance

Typical hourly rate
$25–$49 / hr
50% of 8 agencies
Most common team size
50–249 employees
50% of 6 agencies

Industries they serve most

  • E-commerce (6)
  • Healthcare (4)
  • Hospitality & travel (4)
  • Financial services (3)
  • Education (1)

Based on what 10 listed agencies report about themselves, and 0 verified client reviews. Updated October 24, 2026.

Frequently asked questions about SEO Agencies

How much do SEO agencies charge?

Monthly retainers typically range from $1,500 to $10,000, depending on the size of the site and how competitive the market is. One-off technical audits often cost $2,000–$8,000.

How long until SEO shows results?

Expect early movement in three to six months and meaningful traffic growth in six to twelve. Be wary of any agency that guarantees rankings.