Company lists · Data refreshed September 2026

Top 25 Platform building firms based in London, United Kingdom

Name: Platform building firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 2,029 companies tracked

RevenueBase identified 2,029 platform building firms headquartered in London, United Kingdom as of September 2026 and tracks 32,511 professional contacts across them, including 12,253 with verified work emails. London is the largest hub.

This list covers platform building firms headquartered in London, 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

2,029Companies

32,511Contacts tracked

12,253Verified emails

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The 25 largest platform building firms based in London, United Kingdom

Ranked by team size

Top 25 of 2,029 platform building firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names platform building firms: 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	EndavaIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	10001+	9,653
	“For over two decades, we have been harnessing technology to drive meaningful change.” Source: company website · checked Sep 5, 2026
2	CiklumIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	2,965
	“Ciklum is a global Experience Engineering firm that stands at the forefront of innovation, blending next-generation product engineering, exceptional customer experiences, and…” Source: company website · checked Sep 5, 2026
3	DotsquaresIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	1,581
	“We leverage the latest web and mobile technologies to build, grow and support your business.” Source: company website · checked Sep 5, 2026
4	And DigitalIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,044
	“AND Digital is on a mission to close the world’s digital skills gap.” Source: company website · checked Sep 5, 2026
5	EverywhereIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	n/a	772
	“Everywhere is a digital studio that’s transforming businesses with its powerful, considered products and services.” Source: company website · checked Sep 5, 2026
6	Made TechIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	434
	“Made Tech is on a mission to use technology to improve society - for everyone.” Source: company website · checked Sep 5, 2026
7	ZenitechIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	408
	“Zenitech creates technology to transform businesses.” Source: company website · checked Sep 5, 2026
8	KIN CartaIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	5,001-10,000	400
	“Kin + Carta was acquired by Valtech in 2024.” Source: company website · checked Sep 5, 2026
9	DevtechIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	266
	“Devtech provides outcome-driven digital innovation services and helps companies better respond to change.” Source: company website · checked Sep 5, 2026
10	Vertex AgilityIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	255
	“Vertex Agility is your next Global Digital Consultancy, providing deep expertise in Cloud, Data, and Software to the biggest brands in the world and the most disruptive scale-ups.” Source: company website · checked Sep 5, 2026
11	Dreams Technologies, UK & IndiaIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	221
	“At Dreams Technologies, we’re more than software engineers, we’re digital transformation partners.” Source: company website · checked Sep 5, 2026
12	WaracleIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	209
	“Waracle creates digital products trusted by millions of people.” Source: company website · checked Sep 5, 2026
13	Akqa LeapIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	202
	“AKQA Leap are digital product specialists within the AKQA Group network (WPP), with studios in London and Bristol.” Source: company website · checked Sep 5, 2026
14	YLDIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	166
	“YLD is a software engineering, data engineering, and product design consultancy, specialising in customer experience and disruptive technologies.” Source: company website · checked Sep 5, 2026
15	Digis, A Fiverr Company Nyse FvrrIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	163
	“Digis is a leading software development company with a team of over.” Source: company website · checked Sep 5, 2026
16	duck.designPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	161
	“Design platform with influence around the world We help brands connect with their customers Brand identity, graphic & web design, illustration, motion” Source: company website · checked Sep 5, 2026
17	Investis DigitalIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	158
	“IDX (formerly Investis Digital) specializes in elevating companies and brands and maximizing technology to build strong, relatable, and authentic connections with their audiences.” Source: company website · checked Sep 5, 2026
18	FoolproofIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	149
	“We’re Foolproof.” Source: company website · checked Sep 5, 2026
19	MMTIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	147
	“We are digital leaders shaping tomorrow’s customer experiences to unlock innovation and growth for ambitious brands.” Source: company website · checked Sep 5, 2026
20	DaemonIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	145
	“Founded in 2007, Daemon is a technology consultancy with a mission to make the world a better place by creating movements that power digital transformation.” Source: company website · checked Sep 5, 2026
21	RhapsodyIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	137
	“Rhapsody is a solutions agency built for ambitious brands.” Source: company website · checked Sep 5, 2026
22	USTWOIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	132
	“ustwo is a global digital product studio launching products and services that make a meaningful impact on the world.” Source: company website · checked Sep 5, 2026
23	ClearroutePartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	123
	“ClearRoute is a global platform engineering consultancy that helps enterprises reliably bring high-impact digital products to market faster, cheaper, and more safely.” Source: company website · checked Sep 5, 2026
24	Studio GrapheneIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	116
	“Studio Graphene is an AI-native digital product studio headquartered in London, with studios in Delhi, Lisbon and Geneva.” Source: company website · checked Sep 5, 2026
25	Reading RoomIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	104
	“Reading Room is a full-service digital transformation agency with offices across the UK.” Source: company website · checked Sep 5, 2026

Showing 25 of 2,029 platform building firms based in London, United Kingdom

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Platform building firms based in London, United Kingdom at a glance

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 2029 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

1,203

11-50

653

51-200

121

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for London, over 2,029 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 platform building firms, 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 London, United Kingdom whose own description of what they do matches “platform building firms”. 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 platform building firms, and records with no verified work email. Companies headquartered outside London 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, 12,253 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.

Platform building firms by metro in the United Kingdom

Platform building firms in London2029
Platform building firms in Manchester184
Platform building firms in Birmingham113
Platform building firms in Bristol84
Platform building firms in Glasgow77
Platform building firms in Leeds64
Platform building firms in Edinburgh59
Platform building firms in Belfast43
Platform building firms in Liverpool43
Platform building firms in Brighton41
Platform building firms in Cardiff41
Platform building firms in Nottingham37
Platform building firms in Newcastle Upon Tyne34
Platform building firms in Sheffield34
Platform building firms in Reading33
Platform building firms in Leicester29
Platform building firms in Cambridge27
Platform building firms in Southampton26
Platform building firms in Milton Keynes25

Frequently asked

How many platform building firms are there based in London, United Kingdom?

RevenueBase identified 2,029 platform building firms headquartered in London, 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?

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

Which city has the most platform building firms?

London leads with 2029 headquartered companies, followed by Manchester (184) and Birmingham (113).

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 12,253 verified decision-maker contacts tracked across these 2,029 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.