Company lists · Data refreshed September 2026

Top 25 Startup app development companies based in the United Kingdom

Name: Startup 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 22, 2026 982 companies tracked

RevenueBase identified 982 startup app development companies headquartered in the United Kingdom as of September 2026 and tracks 5,624 professional contacts across them, including 787 with verified work emails. London is the largest hub.

This list covers startup 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 22, 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 22, 2026 86% judged on-target in blind review

982Companies

5,624Contacts tracked

787Verified emails

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The 25 largest startup app development companies based in the United Kingdom

Ranked by team size

Top 25 of 982 startup app development companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to startup 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	KRIFY	Partial evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
2	Magora	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	213 contacts →
	Partial evidence “Magora is an international software development company with 12 years of extensive experience in bespoke development outsourcing market.” Source: RevenueBase Database · checked Sep 22, 2026
3	YLD	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	166 contacts →
	Indirect evidence “YLD is a software engineering, data engineering, and product design consultancy, specialising in customer experience and disruptive technologies.” Source: RevenueBase Database · checked Sep 22, 2026
4	Webevis Technologies	Partial evidence	Bradford, United KingdomHQ checked Sep 22, 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 22, 2026
5	Turn UP Technologies	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	74 contacts →
	Indirect evidence “Turn Up Technologies is a digital growth IT firm headquartered in London, UK with offices across the Texas, UAE, Canada, and Pakistan.” Source: RevenueBase Database · checked Sep 22, 2026
6	Appenza	Indirect evidence	Dartford, United KingdomHQ checked Sep 22, 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 22, 2026
7	Pixelfield	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	46 contacts →
	Indirect evidence “We are the guides on your exciting journey around the digital world.” Source: RevenueBase Database · checked Sep 22, 2026
8	Blockmob Labs	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	46 contacts →
	Indirect evidence “Blockmob Labs is a full-stack product engineering studio building production-grade software across Web3, AI, fintech, SaaS, mobile, and cloud infrastructure.” Source: RevenueBase Database · checked Sep 22, 2026
9	Limeup	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	42 contacts →
	Partial evidence “Limeup is an application & software development company.” Source: RevenueBase Database · checked Sep 22, 2026
10	Avamae Software Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
11	Kernelics	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	35 contacts →
	Indirect evidence “Kernelics is a passionate team of web and mobile software developers, product managers, designers, and QA engineers.” Source: RevenueBase Database · checked Sep 22, 2026
12	Builtbypixel	Strong evidence	Manchester, United KingdomHQ checked Sep 22, 2026	11-50	33 contacts →
	Strong evidence “A digital agency based in Manchester who specialise in the design, development and architecture of Mobile Apps, Website and Online Software.” Source: RevenueBase Database · checked Sep 22, 2026
13	Reach Studios	Strong evidence	Sheffield, United KingdomHQ checked Sep 22, 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 22, 2026
14	Evangelist Apps	Indirect evidence	Fleet, United KingdomHQ checked Sep 22, 2026	11-50	30 contacts →
	Indirect evidence “We build the digital products that power ambitious businesses.” Source: RevenueBase Database · checked Sep 22, 2026
15	Zentix	Partial evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
16	Brightec	Strong evidence	Shoreham, United KingdomHQ checked Sep 22, 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 22, 2026
17	Topdevs Corp	Strong evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
18	Thumbmunkeys LTD	Partial evidence	York, United KingdomHQ checked Sep 22, 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 22, 2026
19	Gemstone	Indirect evidence	Chorleywood, United KingdomHQ checked Sep 22, 2026	1-10	24 contacts →
	Indirect evidence “We are a full-service technology consultancy, providing end-to-end digital product delivery from strategy and design through engineering and ongoing growth.” Source: RevenueBase Database · checked Sep 22, 2026
20	TGA Digital LTD	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	23 contacts →
	Indirect evidence “TGA Digital is a software engineering consultancy focussed on delivering high quality software projects as well as consulting, due diligence, trouble shooting and fund raising.” Source: RevenueBase Database · checked Sep 22, 2026
21	Calvium B Corp	Indirect evidence	Bristol, United KingdomHQ checked Sep 22, 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 22, 2026
22	Keytotech	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	22 contacts →
	Indirect evidence “At KeyToTech, we turn ideas into scalable software products.” Source: RevenueBase Database · checked Sep 22, 2026
23	NGOAR	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	21 contacts →
	Indirect evidence “Ngoar is a pioneering software solutions and technology company.” Source: RevenueBase Database · checked Sep 22, 2026
24	Techcurl Media Solutions	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	21 contacts →
	Partial evidence “Techcurl is a leading agile development company specialising in Web and mobile development helping businesses deliver projects on time and budget.” Source: RevenueBase Database · checked Sep 22, 2026
25	Archnix	Indirect evidence	London, United KingdomHQ checked Sep 22, 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 22, 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: startup 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 startup app development companies.
Partial evidence: Its own public description names part of startup 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 startup 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 982 startup app development companies based in the United Kingdom

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Startup app development companies based in the United Kingdom at a glance

As of Sep 22, 2026

14.0%Verified-email coverage

5.7Average contacts per company

1-10Median size (employees)

47.8%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

650

11-50

284

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 982 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 startup 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 “startup 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 startup 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 startup 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, 787 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 22, 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.

Startup app development companies by metro

Startup app development companies in London469
Startup app development companies in Manchester38
Startup app development companies in Birmingham27

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 startup 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 startup app development companies are there based in the United Kingdom?

RevenueBase identified 982 startup 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?

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

Which city has the most startup app development companies?

London leads with 469 headquartered companies, followed by Manchester (38) and Birmingham (27).

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 787 verified decision-maker contacts tracked across these 982 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 22, 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.