Company lists · Data refreshed September 2026

Top 25 Enterprise software as a service companies based in London, United Kingdom

Name: Enterprise software as a service 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 28, 2026 100 companies tracked

RevenueBase identified 100 enterprise software as a service companies headquartered in London, United Kingdom as of September 2026 and tracks 1,164 professional contacts across them, including 221 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers enterprise software as a service 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 28, 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 28, 2026 86% judged on-target in blind review

100Companies

1,164Contacts tracked

221Verified emails

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The 25 largest enterprise software as a service companies based in London, United Kingdom

Ranked by team size

Top 25 of 100 enterprise software as a service companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise software as a service 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	kpi.com	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	87 contacts →
	Indirect evidence “KPI is an all-in-one business solution providing: Accounting, Payroll, Sales, Human Resources, Project Management, Report and Document applications all in one platform according…” Source: RevenueBase Database · checked Sep 28, 2026
2	Poklyk	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	68 contacts →
	Strong evidence “Poklyk, a European based company, develops and provides business management software products and services for micro, small, medium enterprises and self-employed professionals in…” Source: RevenueBase Database · checked Sep 28, 2026
3	Optimiser	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	57 contacts →
	Indirect evidence “Optimiser is a fully configurable business intelligence ecosystem that helps organisations manage relationships, operations, workflows, communications, and commercial activities…” Source: RevenueBase Database · checked Sep 28, 2026
4	Warrgyizmorsch	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	51 contacts →
	Indirect evidence “Tailored ERP, CRM & SaaS that automates your operations and fuels measurable growth.” Source: RevenueBase Database · checked Sep 28, 2026
5	1st 4 Connect Limited	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	38 contacts →
	Strong evidence “1ST 4 Connect Limited’s core area of business is SAAS (software as a service also knows as software on demand).” Source: RevenueBase Database · checked Sep 28, 2026
6	CODIS	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Partial evidence “Codis are a successful and well established business software developer.” Source: RevenueBase Database · checked Sep 28, 2026
7	Ascendx	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	22 contacts →
	Strong evidence “An enterprise cloud software company that helps teams solve their problems by boosting productivity and transforming tech stacks on CRM platforms such as Salesforce, Dynamics 365…” Source: RevenueBase Database · checked Sep 28, 2026
8	Itouchvision	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “iTouchVision is one of the world's leading cloud-based service providers with innovation & excellence at its base.” Source: RevenueBase Database · checked Sep 28, 2026
9	Kimble Applications NOW Kantata	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	15 contacts →
	Indirect evidence “Kimble Applications and Mavenlink have merged to form Kantata!” Source: RevenueBase Database · checked Sep 28, 2026
10	Nublado	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “We have been through a long journey of advising and designing very complex and integrated Microsoft cloud solutions in multiple different industries like public sector and…” Source: RevenueBase Database · checked Sep 28, 2026
11	Octasys	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Octasys is a dynamic software company that specializes in creating innovative products to meet the ever-changing needs of businesses and consumers.” Source: RevenueBase Database · checked Sep 28, 2026
12	Smarty Software	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Smarty Software is a SaaS company based in the City of London, which mainly provides cloud accounting and cloud CRM solution services.” Source: RevenueBase Database · checked Sep 28, 2026
13	Zigaflow	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “At Zigaflow, we're on a mission to make your business growth inevitable.” Source: RevenueBase Database · checked Sep 28, 2026
14	Codescrum	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial evidence “Codescrum makes the unthinkable possible by understanding business problems, envisioning how software solves them and delivering the right result.” Source: RevenueBase Database · checked Sep 28, 2026
15	Entranet Cloud Platform	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Entranet, is a pioneering Cloud ERP Solution dedicated to delivering business applications over the internet.” Source: RevenueBase Database · checked Sep 28, 2026
16	Square House Technologies	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Software Solutions Through building and supporting other businesses, our company has grown from its small beginnings to becoming a trusted and renowned field leader in…” Source: RevenueBase Database · checked Sep 28, 2026
17	Online50 Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “At the start of the century Online50 invented the idea of clients and accountants being able to work on their financial software at the same time using the Internet - before we…” Source: RevenueBase Database · checked Sep 28, 2026
18	Cloud 9 Assist LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Cloud 9 Assist Ltd develop a wide range of hosted online applications for businesses encompassing areas such as CRM, Order Processing, Project Management, Helpdesk, Expense Forms…” Source: RevenueBase Database · checked Sep 28, 2026
19	Shoonyata	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	4 contacts →
	Partial evidence “Shoonyata's mission is to make power of innovation and software affordable to all.” Source: RevenueBase Database · checked Sep 28, 2026
20	Cloudsaber	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	4 contacts →
	Indirect evidence “Cloudsaber is a specialist business solutions provider based in the UK, focused on implementing and optimising leading CRM, ERP, and accounting systems.” Source: RevenueBase Database · checked Sep 28, 2026
21	allin1.app	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence “About allin1.app In today's fast-paced digital landscape, businesses require more than just tools; they need comprehensive solutions that evolve with their needs.” Source: RevenueBase Database · checked Sep 28, 2026
22	Bluespidy	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “BlueSpidy Social Office is a single sign-on web-based application delivering tools for SMEs to manage customers, sales and suppliers, people, products and projects, documents…” Source: RevenueBase Database · checked Sep 28, 2026
23	Skynet Applied Systems LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Control your business from anywhere.” Source: RevenueBase Database · checked Sep 28, 2026
24	TCM Information Analytics	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	2 contacts →
	Indirect evidence “At TCM information analytics (TCM) we believe that every company is different and contains a unique blend of information, processes and skills to manage their operations.” Source: RevenueBase Database · checked Sep 28, 2026
25	Lucrum ERP	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	1 contacts →
	Indirect evidence “Lucrum is a multi-tenant Cloud ERP that offers customers the sustainable operational advantage of its micro-vertical industry functionality.” Source: RevenueBase Database · checked Sep 28, 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: enterprise software as a service 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 enterprise software as a service companies.
Partial evidence: Its own public description names part of enterprise software as a service companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise software as a service 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 100 enterprise software as a service companies based in London, United Kingdom

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Enterprise software as a service companies based in London, United Kingdom at a glance

As of Sep 28, 2026

19.0%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

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 100 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 enterprise software as a service 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 “enterprise software as a service 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 enterprise software as a service 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 enterprise software as a service 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, 221 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 28, 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.

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 enterprise software as a service 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 enterprise software as a service companies are there based in London, United Kingdom?

RevenueBase identified 100 enterprise software as a service 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?

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

Which city in the United Kingdom has the most enterprise software as a service companies?

London leads the United Kingdom with 100 headquartered companies, followed by Manchester (12) and Bristol (6).

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 221 verified decision-maker contacts tracked across these 100 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 28, 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.