Company lists · Data refreshed September 2026

Top 25 Custom mobile app development companies based in the United Kingdom

Name: Custom mobile app development 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 19, 2026 717 companies tracked

RevenueBase identified 717 custom mobile app development companies headquartered in the United Kingdom as of September 2026 and tracks 6,073 professional contacts across them, including 773 with verified work emails. London is the largest hub.

This list covers custom mobile app development 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 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 19, 2026 86% judged on-target in blind review

717Companies

6,073Contacts tracked

773Verified emails

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The 25 largest custom mobile app development companies based in the United Kingdom

Ranked by team size

Top 25 of 717 custom mobile app development companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to custom mobile app development companies: 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	Apadmi	Partial evidence	Salford Quays, United KingdomHQ checked Sep 19, 2026	201-500	314 contacts →
	Partial evidence “Apadmi is a leading specialist mobile consultancy.” Source: RevenueBase Database · checked Sep 19, 2026
2	KRIFY	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	221 contacts →
	Strong 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 19, 2026
3	Synycs Group	Strong evidence	London, United KingdomHQ checked Sep 19, 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 19, 2026
4	Webevis Technologies	Strong evidence	Bradford, United KingdomHQ checked Sep 19, 2026	51-200	83 contacts →
	Strong 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 19, 2026
5	Appenza	Partial evidence	Dartford, United KingdomHQ checked Sep 19, 2026	11-50	61 contacts →
	Partial 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 19, 2026
6	Limeup	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	42 contacts →
	Partial evidence “Limeup is an application & software development company.” Source: RevenueBase Database · checked Sep 19, 2026
7	Taramsys	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	39 contacts →
	Strong evidence “Your premium software development partner for mobile, white label & enterprise applications.” Source: RevenueBase Database · checked Sep 19, 2026
8	Avamae Software Solutions LTD	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	35 contacts →
	Strong evidence “AVAMAE is a London-based product development agency, building bespoke mobile, software and web applications since 2011.” Source: RevenueBase Database · checked Sep 19, 2026
9	Kernelics	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	35 contacts →
	Partial evidence “Kernelics is a passionate team of web and mobile software developers, product managers, designers, and QA engineers.” Source: RevenueBase Database · checked Sep 19, 2026
10	Pocket APP	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	31 contacts →
	Strong evidence “We are an independent mobile UI & UX app development company.” Source: RevenueBase Database · checked Sep 19, 2026
11	Zentix	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	30 contacts →
	Strong evidence “ZentixSoft is a UK-based software development company helping businesses grow faster with AI, automation, and custom software.” Source: RevenueBase Database · checked Sep 19, 2026
12	Brightec	Strong evidence	Shoreham, United KingdomHQ checked Sep 19, 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 19, 2026
13	Topdevs Corp	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	29 contacts →
	Strong evidence “Mobile & Web Digital Solutions for Startups & Businesses Count on TopDevs full-cycle mobile app and web development outsourcing services or hire the IT experts you need to augment…” Source: RevenueBase Database · checked Sep 19, 2026
14	Thumbmunkeys LTD	Strong evidence	York, United KingdomHQ checked Sep 19, 2026	11-50	29 contacts →
	Strong 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 19, 2026
15	Calvium B Corp	Partial evidence	Bristol, United KingdomHQ checked Sep 19, 2026	11-50	22 contacts →
	Partial evidence “Calvium is a leading digital innovation agency combining expertise in experience design, software engineering and mobile innovation.” Source: RevenueBase Database · checked Sep 19, 2026
16	Keytotech	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	22 contacts →
	Indirect evidence “At KeyToTech, we turn ideas into scalable software products.” Source: RevenueBase Database · checked Sep 19, 2026
17	Archnix	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “Archnix is a leading software & digital solution provider catering to a wide range of business needs in the global market.” Source: RevenueBase Database · checked Sep 19, 2026
18	Lloyds Knight International	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Partial evidence “Lloyds Knight International brings together the best dedicated iOS, Android, and web app developers, so you can outsource your project and get a top-quality product.” Source: RevenueBase Database · checked Sep 19, 2026
19	Indiespring	Strong evidence	Manchester, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Strong evidence “Indiespring is a leading provider of innovative, mobile-first, custom software solutions that drive business transformation and accelerate our customers’ growth.” Source: RevenueBase Database · checked Sep 19, 2026
20	Devsstream Limited	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Partial evidence “DevsStream provides software development solutions and services all over the world.” Source: RevenueBase Database · checked Sep 19, 2026
21	Deverium	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	19 contacts →
	Strong evidence “We are deverium - not your average mobile software development company with a local presence in Lithuania, the United Kingdom, and Sweden, actively delivering digital…” Source: RevenueBase Database · checked Sep 19, 2026
22	Smile Machine	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	19 contacts →
	Partial evidence “We're digital innovators with a passion for everything mobile.” Source: RevenueBase Database · checked Sep 19, 2026
23	Softexpoit	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	18 contacts →
	Strong evidence “Softexpoit's team of experts combines technical expertise and creativity to develop custom software, mobile app, and web app solutions that meet your specific business/official…” Source: RevenueBase Database · checked Sep 19, 2026
24	Appoly	Strong evidence	Royal Leamington Spa, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Strong evidence “Appoly is a leading web and mobile app development studio based in Royal Leamington Spa.” Source: RevenueBase Database · checked Sep 19, 2026
25	Dabapps	Indirect evidence	Brighton, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “DabApps helps ambitious businesses turn AI opportunities into real, working software.” Source: RevenueBase Database · checked Sep 19, 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: custom mobile app development companies. 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 custom mobile app development companies.
Partial evidence: Its own public description names part of custom mobile app development companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom mobile app development companies. 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 717 custom mobile app development companies based in the United Kingdom

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Custom mobile app development companies based in the United Kingdom at a glance

As of Sep 19, 2026

12.7%Verified-email coverage

8.5Average contacts per company

1-10Median size (employees)

44.2%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

457

11-50

214

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 717 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 custom mobile app development companies, 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 “custom mobile app development companies”. 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 custom mobile app development companies), 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 custom mobile app development 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 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, 773 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 19, 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.

Custom mobile app development companies by metro

Custom mobile app development companies in London317
Custom mobile app development companies in Manchester35

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 custom mobile app development companies, 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 custom mobile app development companies are there based in the United Kingdom?

RevenueBase identified 717 custom mobile app development 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?

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

Which city has the most custom mobile app development companies?

London leads with 317 headquartered companies, followed by Manchester (35) and Bristol (15).

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 773 verified decision-maker contacts tracked across these 717 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 19, 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.