Company lists · Data refreshed September 2026

Top 25 App development marketing agencies based in the United Kingdom

Name: App development marketing agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 1,053 companies tracked

RevenueBase identified 1,053 app development marketing agencies headquartered in the United Kingdom as of September 2026 and tracks 6,390 professional contacts across them, including 1,298 with verified work emails. London is the largest hub.

This list covers app development marketing agencies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review

1,053Companies

6,390Contacts tracked

1,298Verified emails

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The 25 largest app development marketing agencies based in the United Kingdom

Ranked by team size

Top 25 of 1,053 app development marketing agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to app development marketing agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Upstream	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	336 contacts →
	Indirect evidence “We are a leader in mobile technology, providing innovative solutions to 1.2 billion consumers.” Source: RevenueBase Database · checked Sep 27, 2026
2	Apadmi	Indirect evidence	Salford Quays, United KingdomHQ checked Sep 27, 2026	201-500	314 contacts →
	Indirect evidence “Apadmi is a leading specialist mobile consultancy.” Source: RevenueBase Database · checked Sep 27, 2026
3	KRIFY	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	221 contacts →
	Partial evidence “Krify is a results-driven technology company specializing in crafting user-centric mobile apps, web applications, and software solutions.” Source: RevenueBase Database · checked Sep 27, 2026
4	Synycs Group	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	132 contacts →
	Strong evidence “Incorporated in 2014 and headquartered in the UK, Synycs Group is a CMMI Level 4 industry-leading & most reliable software and mobile app development company known for delivering…” Source: RevenueBase Database · checked Sep 27, 2026
5	Webevis Technologies	Partial evidence	Bradford, United KingdomHQ checked Sep 27, 2026	51-200	83 contacts →
	Partial evidence “Webevis is a software development company specializing in delivering incomparable web and mobile application development services to diverse clients across the globe.” Source: RevenueBase Database · checked Sep 27, 2026
6	Purecontent	Partial evidence	Norwich, United KingdomHQ checked Sep 27, 2026	11-50	63 contacts →
	Partial evidence “PureContent is a full-service marketing agency that provides everything your business needs to create impactful, results-driven marketing campaigns.” Source: RevenueBase Database · checked Sep 27, 2026
7	Appenza	Indirect evidence	Dartford, United KingdomHQ checked Sep 27, 2026	11-50	61 contacts →
	Indirect evidence “We aim at improvising our client businesses by developing innovative mobile & web applications and solutions that boost productivity, reduces operational costs, increases ROI and…” Source: RevenueBase Database · checked Sep 27, 2026
8	Yodel Mobile	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	41 contacts →
	Partial evidence “Yodel Mobile is a global, award-winning app growth consultancy with over 18 years of experience helping brands drive sustainable growth across the entire app lifecycle.” Source: RevenueBase Database · checked Sep 27, 2026
9	Adopstar LTD	Strong evidence	Cullompton, United KingdomHQ checked Sep 27, 2026	11-50	38 contacts →
	Strong evidence “provides complete Advertising, Marketing and Web Development Solutions for all Businesses, from startups to multinationals.” Source: RevenueBase Database · checked Sep 27, 2026
10	Cynosure Designs	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	36 contacts →
	Partial evidence “Cynosure Designs is a UK & UAE-based IT and marketing agency providing 360° digital solutions that are experience-driven and results-focused.” Source: RevenueBase Database · checked Sep 27, 2026
11	Avamae Software Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	35 contacts →
	Partial evidence “AVAMAE is a London-based product development agency, building bespoke mobile, software and web applications since 2011.” Source: RevenueBase Database · checked Sep 27, 2026
12	Upperdog LTD	Partial evidence	Bournemouth, United KingdomHQ checked Sep 27, 2026	11-50	34 contacts →
	Partial evidence “Upperdog is a creative digital marketing agency based in Bournemouth, Dorset, providing innovative and effective solutions to conquer the online world.” Source: RevenueBase Database · checked Sep 27, 2026
13	Reach Studios	Strong evidence	Sheffield, United KingdomHQ checked Sep 27, 2026	11-50	31 contacts →
	Strong evidence “The web & mobile app development agency helping start-ups, SMEs & global brands with digital projects.” Source: RevenueBase Database · checked Sep 27, 2026
14	Koko Digital	Indirect evidence	Newcastle Under Lyme, United KingdomHQ checked Sep 27, 2026	11-50	31 contacts →
	Indirect evidence “We're Koko, an award-winning creative digital agency based in the UK.” Source: RevenueBase Database · checked Sep 27, 2026
15	Otherwayaround	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	30 contacts →
	Strong evidence “Not following the same old rules for app marketing, where only the big-spender apps are favored.” Source: RevenueBase Database · checked Sep 27, 2026
16	Zentix	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	30 contacts →
	Partial evidence “ZentixSoft is a UK-based software development company helping businesses grow faster with AI, automation, and custom software.” Source: RevenueBase Database · checked Sep 27, 2026
17	Brightec	Strong evidence	Shoreham, United KingdomHQ checked Sep 27, 2026	11-50	29 contacts →
	Strong evidence “Simply delivering the best apps for our clients We’re a multi award-winning mobile app development agency based in Brighton, UK.” Source: RevenueBase Database · checked Sep 27, 2026
18	Thumbmunkeys LTD	Partial evidence	York, United KingdomHQ checked Sep 27, 2026	11-50	29 contacts →
	Partial evidence “Thumbmunkeys is one of the UK’s leading mobile and web development companies located in the city of York.” Source: RevenueBase Database · checked Sep 27, 2026
19	Redbox Mobile	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	28 contacts →
	Partial evidence “Redbox Mobile has a singular vision: to provide the very best app store growth strategies for brands and app owners across key verticals including gaming, gambling, trading…” Source: RevenueBase Database · checked Sep 27, 2026
20	Bolser Digital Agency	Indirect evidence	Leeds, United KingdomHQ checked Sep 27, 2026	11-50	28 contacts →
	Indirect evidence “Bolser is an award-winning digital agency based in Leeds.” Source: RevenueBase Database · checked Sep 27, 2026
21	Terrier Agency	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	28 contacts →
	Indirect evidence “Based in London, Terrier has a team that has collectively over 50 years experience in digital advertising.” Source: RevenueBase Database · checked Sep 27, 2026
22	Fonemedia	Partial evidence	Leeds, United KingdomHQ checked Sep 27, 2026	11-50	27 contacts →
	Partial evidence “fonemedia – we are a Leeds-based mobile marketing agency.” Source: RevenueBase Database · checked Sep 27, 2026
23	44pixels	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	27 contacts →
	Partial evidence “44pixels is a London-based mobile app studio passionate about creating beautiful, engaging experiences that harness the power of technology and AI.” Source: RevenueBase Database · checked Sep 27, 2026
24	Calvium B Corp	Indirect evidence	Bristol, United KingdomHQ checked Sep 27, 2026	11-50	22 contacts →
	Indirect evidence “Calvium is a leading digital innovation agency combining expertise in experience design, software engineering and mobile innovation.” Source: RevenueBase Database · checked Sep 27, 2026
25	Bwar LTD	Indirect evidence	Stoke-on-trent, United KingdomHQ checked Sep 27, 2026	11-50	22 contacts →
	Indirect evidence “We are a digital agency based in Stoke-on-Trent, Staffordshire covering and offering all things digital.” Source: RevenueBase Database · checked Sep 27, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: app development marketing agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names app development marketing agencies.
Partial evidence: Its own public description names part of app development marketing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name app development marketing agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,053 app development marketing agencies based in the United Kingdom

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App development marketing agencies based in the United Kingdom at a glance

As of Sep 27, 2026

20.3%Verified-email coverage

6.1Average contacts per company

1-10Median size (employees)

43.8%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

637

11-50

349

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 1,053 companies.

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 app development marketing agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “app development marketing agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names app development marketing agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among app development marketing agencies, 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 its RevenueBase Smart Search 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, 1,298 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 27, 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.

App development marketing agencies by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names app development marketing agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many app development marketing agencies are there based in the United Kingdom?

RevenueBase identified 1,053 app development marketing agencies 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?

Upstream, headquartered in London, tops this list with the largest team on record.

Which city has the most app development marketing agencies?

London leads with 461 headquartered companies, followed by Manchester (42) and Birmingham (31).

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 1,298 verified decision-maker contacts tracked across these 1,053 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 27, 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 Smart Search, 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.