Top App Development Agencies in London

App Development Agencies in London: compare 11 agencies, ranked by verified client reviews.

11 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

Zazz

No reviews yet

Modern IT. Built secure. Delivered right.

Min. project size
Not listed
Hourly rate
$25–$49 / hr
Team size
250+ employees
Headquarters
Seattle, United States

Services

  • Mobile App Development
  • Software Development
  • IT Services
  • Cybersecurity
  • Staff Augmentation
Visit website (opens in a new tab) View profile Zazz

App Development Agencies in London at a glance

Typical hourly rate
$25–$49 / hr
40% of 10 agencies
Most common minimum project
$10,000+
40% of 5 agencies
Most common team size
50–249 employees
60% of 10 agencies

Industries they serve most

  • Financial services (9)
  • Healthcare (8)
  • E-commerce (6)
  • Education (4)
  • Real estate (3)

Based on what 11 listed agencies report about themselves, and 0 verified client reviews. Updated October 24, 2026.