Top Web Design & Development Agencies in London

Web Agencies in London: compare 12 agencies, ranked by verified client reviews.

12 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

Sigli

No reviews yet

Data Science with Purpose, Innovation with Impact

Min. project size
$10,000+
Hourly rate
Not listed
Team size
50–249 employees
Headquarters
Antwerp, Belgium

Services

  • Software development
  • Web development
  • Mobile apps
  • Artificial intelligence
  • Data consulting

Web Agencies in London at a glance

Typical hourly rate
$50–$99 / hr
56% of 9 agencies
Most common minimum project
$1,000+
50% of 8 agencies
Most common team size
50–249 employees
50% of 8 agencies

Industries they serve most

  • Financial services (6)
  • Healthcare (5)
  • E-commerce (4)
  • Real estate (4)
  • Hospitality & travel (3)

Based on what 12 listed agencies report about themselves, and 0 verified client reviews. Updated October 24, 2026.

Frequently asked questions about Web Agencies

How much does a website from an agency cost?

Most small business sites start around $5,000–$15,000. Custom builds with integrations, e-commerce or complex content often cost $25,000 and up. Use the minimum project size filter to see agencies that match your budget.

How long does it take to build a website?

A brochure site usually takes 6–10 weeks from kickoff to launch. Larger projects with custom functionality can take three to six months. Ask agencies for a timeline with clear milestones before you sign.

How are agencies ranked here?

Agencies are ordered by a review-weighted score. It combines each agency's average rating with how many verified reviews it has, so a long track record counts for more than a single five-star review.