Company lists · Data refreshed September 2026

Top 25 Responsive web design companies based in the United Kingdom

Name: Responsive web design companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 897 companies tracked

RevenueBase identified 897 responsive web design companies headquartered in the United Kingdom as of September 2026 and tracks 3,116 professional contacts across them, including 699 with verified work emails and 239 with mobile numbers. London is the largest hub.

This list covers responsive web design companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

897Companies

3,116Contacts tracked

699Verified emails

239Mobile numbers

Explore all 897 companies → Free signup · no credit card · 500 free credits

The 25 largest responsive web design companies based in the United Kingdom

Ranked by team size

Top 25 of 897 responsive web design companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names responsive web design companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	BuiltbypixelPartial evidence	Manchester, United KingdomHQ checked Sep 5, 2026	11-50	33
	“A digital agency based in Manchester who specialise in the design, development and architecture of Mobile Apps, Website and Online Software.” Source: company website · checked Sep 5, 2026
2	AER StudiosIndirect evidence	Bristol, United KingdomHQ checked Sep 5, 2026	11-50	31
	“Clients shouldn’t have to choose between outstanding creative and technical rigour.” Source: company website · checked Sep 5, 2026
3	BrightecIndirect evidence	Shoreham, United KingdomHQ checked Sep 5, 2026	11-50	29
	“Simply delivering the best apps for our clients We’re a multi award-winning mobile app development agency based in Brighton, UK.” Source: company website · checked Sep 5, 2026
4	YellowballPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	26
	“We’re a hand-picked global team of exceptional designers, engineers, SEO experts and paid media specialists, crafting websites and digital experience that work as hard as you do.” Source: company website · checked Sep 5, 2026
5	Verto UKIndirect evidence	Kettering, United KingdomHQ checked Sep 5, 2026	11-50	22
	“We are Verto – the East Midlands’ foremost creative agency.” Source: company website · checked Sep 5, 2026
6	DREWLIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	22
	“We're on a quest to change the way sites are built.” Source: company website · checked Sep 5, 2026
7	MutualStrong evidence	Hastings, United KingdomHQ checked Sep 5, 2026	1-10	21
	“We're a web design studio in Hastings, known for our pragmatic approach and our outstanding work with respected brands.” Source: company website · checked Sep 5, 2026
8	Esterling LTD Sterling GroupStrong evidence	Birmingham, United KingdomHQ checked Sep 5, 2026	11-50	20
	“We are a Birmingham based creative agency that is passionate about web design and delivering sites that impress and get you more business.” Source: company website · checked Sep 5, 2026
9	FastfwdIndirect evidence	Birmingham, United KingdomHQ checked Sep 5, 2026	11-50	19
	“A premium Digital Agency producing websites, internet applications and mobile apps.” Source: company website · checked Sep 5, 2026
10	ROUGEPartial evidence	Theale, United KingdomHQ checked Sep 5, 2026	11-50	19
	“Rouge is a UK-based digital design agency.” Source: company website · checked Sep 5, 2026
11	XecutorsIndirect evidence	Manchester, United KingdomHQ checked Sep 5, 2026	11-50	19
	“Here at Xecutors, we are committed to providing comprehensive solutions to businesses of all sizes.” Source: company website · checked Sep 5, 2026
12	Design BOXPartial evidence	Westcliff-on-sea, United KingdomHQ checked Sep 5, 2026	11-50	18
	“Design Box is a premium design & digital marketing agency that focuses on quality, innovation, speed & success.” Source: company website · checked Sep 5, 2026
13	VsourzIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	17
	“Vsourz is an international technology partner helping organisations turn digital ambition into production-ready outcomes.” Source: company website · checked Sep 5, 2026
14	WQAIndirect evidence	Warwick, United KingdomHQ checked Sep 5, 2026	11-50	17
	“Build better.” Source: company website · checked Sep 5, 2026
15	waat.euPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	17
	“WAAT is a multi-talented team of developers, engineers, designers and marketing experts with a vast wealth of experience in delivering websites, systems and apps.” Source: company website · checked Sep 5, 2026
16	APP GenieIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	17
	“App Genie (appg.co) is a mobile app development agency founded in 2022, with its product team based in Istanbul, Türkiye.” Source: company website · checked Sep 5, 2026
17	Hush DigitalPartial evidence	Darlington, United KingdomHQ checked Sep 5, 2026	1-10	16
	“Based in Darlington, North East England, Hush Digital provides usable, effective websites designed to meet the needs of your business and your customers.” Source: company website · checked Sep 5, 2026
18	Apical IT Solutions LTDIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	15
	“Apical IT Solutions is a software technology company headquartered in London, United Kingdom (UK) with presence in India.” Source: company website · checked Sep 5, 2026
19	TOIMIPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	15
	“Toimi is a leader in web and mobile development, with more than 8 years of experience in crafting software solutions for small to medium-sized businesses and enterprise-level…” Source: company website · checked Sep 5, 2026
20	16iStrong evidence	Cheltenham, United KingdomHQ checked Sep 5, 2026	11-50	14
	“16 Interactive is a web design and development company based in Cheltenham, UK.” Source: company website · checked Sep 5, 2026
21	Binary VisionIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	12
	“Hello, we’re Binary Vision A leading force in digital for nearly 40 years Some people think digital is all about technology.” Source: company website · checked Sep 5, 2026
22	Take That LimitedIndirect evidence	Harrogate, United KingdomHQ checked Sep 5, 2026	11-50	12
	“We are an innovative, forward-thinking marketing agency that has been producing solid results for nearly 30 years.” Source: company website · checked Sep 5, 2026
23	LightflowsPartial evidence	Guildford, United KingdomHQ checked Sep 5, 2026	11-50	12
	“Lightflows are web, software and app development leaders based in Guildford, in the heart of leafy Surrey.” Source: company website · checked Sep 5, 2026
24	Geek DesignsIndirect evidence	Peterborough, United KingdomHQ checked Sep 5, 2026	1-10	11
	“In every aspect of our work, we aim to empower businesses to succeed by going against familiarity to create something truly bespoke.” Source: company website · checked Sep 5, 2026
25	Sound In TheoryIndirect evidence	Exeter, United KingdomHQ checked Sep 5, 2026	1-10	11
	“Sound in Theory has enjoyed a thriving business for 15 years.” Source: company website · checked Sep 5, 2026

Showing 25 of 897 responsive web design companies based in the United Kingdom

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Responsive web design companies based in the United Kingdom at a glance

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 300 HQs

239Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

726

11-50

146

51-200

201-500

Verified emails by last verification

0–30

644

31–60

61–90

90–180

180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among responsive web design companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “responsive web design companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among responsive web design companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 699 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Responsive web design companies by metro

Responsive web design companies in London300
Responsive web design companies in Manchester25

Frequently asked

How many responsive web design companies are there based in the United Kingdom?

RevenueBase identified 897 responsive web design companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Builtbypixel, headquartered in Manchester Manchester, tops this list with the largest team on record.

Which city has the most responsive web design companies?

London leads with 300 headquartered companies, followed by Manchester (25) and Birmingham (18).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 699 verified decision-maker contacts tracked across these 897 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.