Company lists · Data refreshed September 2026

Top 25 Outsystems development companies based in London, United Kingdom

Name: Outsystems development companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 616 companies tracked

RevenueBase identified 616 outsystems development companies headquartered in London, United Kingdom as of September 2026 and tracks 7,595 professional contacts across them, including 955 with verified work emails. London is the largest hub.

This list covers outsystems development companies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 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 20, 2026 86% judged on-target in blind review

616Companies

7,595Contacts tracked

955Verified emails

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The 25 largest outsystems development companies based in London, United Kingdom

Ranked by team size

Top 25 of 616 outsystems development companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to outsystems 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	Dotsquares	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	1,581 contacts →
	Indirect evidence “We leverage the latest web and mobile technologies to build, grow and support your business.” Source: RevenueBase Database · checked Sep 20, 2026
2	SENLA	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	515 contacts →
	Indirect evidence “In 2012, SENLA set out with a vision: to transform people's lives with exceptional software.” Source: RevenueBase Database · checked Sep 20, 2026
3	KRIFY	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	221 contacts →
	Indirect 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 20, 2026
4	NCUBE	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	180 contacts →
	Indirect evidence “In a globalized world, code is currency, and great developers are the gold standard.” Source: RevenueBase Database · checked Sep 20, 2026
5	scrums.com	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	163 contacts →
	Indirect evidence “Scrums.com is the Software Engineering Orchestration Platform (SEOP).” Source: RevenueBase Database · checked Sep 20, 2026
6	Digis, A Fiverr Company Nyse Fvrr	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	163 contacts →
	Partial evidence “Digis is a leading software development company with a team of over.” Source: RevenueBase Database · checked Sep 20, 2026
7	Xynotech	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	96 contacts →
	Partial evidence “Xynotech is a provider of IT consulting and software development services that help companies overtake their competition.” Source: RevenueBase Database · checked Sep 20, 2026
8	MAD Devs LLC	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	92 contacts →
	Indirect evidence “Mad Devs is a London-headquartered full-stack IT company developing enterprise-grade software solutions for businesses in finance, transport and logistics, security, education…” Source: RevenueBase Database · checked Sep 20, 2026
9	Clurgo	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	76 contacts →
	Indirect evidence “Clurgo empowers global enterprises and early ventures to deliver software at higher velocity and better quality.” Source: RevenueBase Database · checked Sep 20, 2026
10	EAI Systems	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	76 contacts →
	Indirect evidence “About Us - Two Decades of Enterprise Integration.” Source: RevenueBase Database · checked Sep 20, 2026
11	Timspark	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	73 contacts →
	Partial evidence “Timspark is a software development company/hub that creates custom software solutions to fit clients’ business needs.” Source: RevenueBase Database · checked Sep 20, 2026
12	Agile Cyber Solutions	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	69 contacts →
	Partial evidence “Agile Cyber Solutions is a company providing software services which prides itself as an understanding IT partner for various product development companies, large portals…” Source: RevenueBase Database · checked Sep 20, 2026
13	Raznameh Group	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	68 contacts →
	Partial evidence “We are a software development company based in the United Kingdom with some Europe, Asia, and eastern Europe offices.” Source: RevenueBase Database · checked Sep 20, 2026
14	3i-Vision	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	60 contacts →
	Partial evidence “3i-Vision company was Founded in 2012, 3i-Vision is a provider of IT consulting services and custom software development with IT professionals.” Source: RevenueBase Database · checked Sep 20, 2026
15	Satva Softech	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	53 contacts →
	Indirect evidence “Established in 2015, SATVA Softech has carved a distinguished niche in the global technology landscape.” Source: RevenueBase Database · checked Sep 20, 2026
16	Devbox	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	52 contacts →
	Partial evidence “Devbox Technologies is a UK based company that specializes in providing services related to the development, testing, maintenance, and enhancement of software applications for…” Source: RevenueBase Database · checked Sep 20, 2026
17	Warrgyizmorsch	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	51 contacts →
	Indirect evidence “Tailored ERP, CRM & SaaS that automates your operations and fuels measurable growth.” Source: RevenueBase Database · checked Sep 20, 2026
18	Insight International UK LTD	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	50 contacts →
	Partial evidence “We provide Software Development, Maintenance and Other Related IT Services, across spectrum, depending on individual client’s needs and dependability on us.” Source: RevenueBase Database · checked Sep 20, 2026
19	Thinq24	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	42 contacts →
	Partial evidence “Software Development Company that encourages thinking beyond limits, turning our customers' ideas into reality.” Source: RevenueBase Database · checked Sep 20, 2026
20	Devgrid	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Partial evidence “DevGrid was Founded in 2015 by a group of seasoned tech entrepreneurs on a mission to make outsourced product development a positive and productive experience.” Source: RevenueBase Database · checked Sep 20, 2026
21	Taramsys	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Partial evidence “Your premium software development partner for mobile, white label & enterprise applications.” Source: RevenueBase Database · checked Sep 20, 2026
22	Mifort	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Partial evidence “We are a software development outsourcing company with 9+ years in business and 200+ successful projects.” Source: RevenueBase Database · checked Sep 20, 2026
23	Saqaya	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	36 contacts →
	Indirect evidence “At SAQAYA, we grow businesses by engineering technology that customers love!” Source: RevenueBase Database · checked Sep 20, 2026
24	IVY Tech	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	35 contacts →
	Partial evidence “We are reinventing how startups grow their software development teams by bridging the gap between outsourcing and in-house hiring.” Source: RevenueBase Database · checked Sep 20, 2026
25	auxilium.digital	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	35 contacts →
	Partial evidence “Auxilium Digital helps businesses with limited resources, higher operational costs achieve utmost customer satisfaction through providing customized offshore development teams…” Source: RevenueBase Database · checked Sep 20, 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: outsystems 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 outsystems development companies.
Partial evidence: Its own public description names part of outsystems development companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsystems 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 616 outsystems development companies based in London, United Kingdom

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Outsystems development companies based in London, United Kingdom at a glance

As of Sep 20, 2026

12.6%Verified-email coverage

12.3Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

305

11-50

228

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 616 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 outsystems 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 London, United Kingdom whose own description of what they do matches “outsystems 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 outsystems 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 outsystems development companies, 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 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, 955 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 20, 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.

Outsystems development companies by metro in the United Kingdom

Outsystems development companies in London616
Outsystems development companies in Manchester48
Outsystems development companies in Birmingham36

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 outsystems 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 outsystems development companies are there based in London, United Kingdom?

RevenueBase identified 616 outsystems development companies 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?

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

Which city has the most outsystems development companies?

London leads with 616 headquartered companies, followed by Manchester (48) and Birmingham (36).

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 955 verified decision-maker contacts tracked across these 616 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 20, 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.