Company lists · Data refreshed September 2026

Top 25 SaaS companies based in London, United Kingdom

Name: SaaS 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 13, 2026 76 companies tracked

RevenueBase identified 76 SaaS companies headquartered in London, United Kingdom as of September 2026 and tracks 433 professional contacts across them, including 147 with verified work emails and 21 with mobile numbers. London is the largest hub.

This list covers SaaS 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 13, 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 13, 2026 86% judged on-target in blind review

76Companies

433Contacts tracked

147Verified emails

21Mobile numbers

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The 25 largest SaaS companies based in London, United Kingdom

Ranked by team size

Top 25 of 76 SaaS companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 13, 2026. RevenueBase Smart Search rates how each company's information relates to SaaS 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	Domos FS	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	39 contacts →
	Indirect evidence “Domos FS is part of SimCorp.” Source: RevenueBase Database · checked Sep 13, 2026
2	1st 4 Connect Limited	Strong evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
3	EYONA	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	31 contacts →
	Strong evidence “Eyona is a multi-product company specialising in B2B SaaS products.” Source: RevenueBase Database · checked Sep 13, 2026
4	Saastock	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	29 contacts →
	Indirect evidence “Where AI meets ARR Whether you’re building your first AI feature or rearchitecting your go-to-market, SaaStock gives you the frameworks, relationships, and energy to scale with…” Source: RevenueBase Database · checked Sep 13, 2026
5	Stratos Technologies	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	25 contacts →
	Indirect evidence “STRATOS is a London-based technology company founded in 2022.” Source: RevenueBase Database · checked Sep 13, 2026
6	Itouchvision	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
7	Madx Digital	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	14 contacts →
	Strong evidence “We provide end-to-end solutions for rapid SaaS growth, helping you develop tailored plans to scale your business, impress investors, and over-deliver to your customers.” Source: RevenueBase Database · checked Sep 13, 2026
8	Recognyte	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	12 contacts →
	Indirect evidence “Recognyte has combined years of real estate knowledge alongside cutting-edge artificial intelligence, machine learning, and large-scale data collection, to reshape the landscape…” Source: RevenueBase Database · checked Sep 13, 2026
9	BYZZ	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	9 contacts →
	Indirect evidence “We are a specialist online byzness services provider, supplying startup, small and medium companies with online features and tools.” Source: RevenueBase Database · checked Sep 13, 2026
10	Octasys	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	9 contacts →
	Indirect 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 13, 2026
11	Smarty Software	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	9 contacts →
	Strong 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 13, 2026
12	Datore	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	8 contacts →
	Indirect evidence “About Us: At Datore, our mission is to make game-changing insights available to all with Analytics as a Service (AaaS).” Source: RevenueBase Database · checked Sep 13, 2026
13	Infini Corporation	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	6 contacts →
	Strong evidence “Infini is an app development company, delivering bespoke SaaS solutions to SME's and enterprise clients.” Source: RevenueBase Database · checked Sep 13, 2026
14	The Saas Jedi	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	5 contacts →
	Strong evidence “We are specialists in fitting popular SAAS tools to your business needs.” Source: RevenueBase Database · checked Sep 13, 2026
15	Serac Technologies	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	5 contacts →
	Strong evidence “Intermediate SAAS software house focusing on providing businesses within the property & construction industry with appropriate packages that automate tasks handling data.” Source: RevenueBase Database · checked Sep 13, 2026
16	Online50 Limited	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	5 contacts →
	Indirect 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 13, 2026
17	Cloud 9 Assist LTD	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	4 contacts →
	Indirect 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 13, 2026
18	Uptopy	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	2 contacts →
	Strong evidence “Mission: Fueling SaaS growth with transparent revenue-based financing.” Source: RevenueBase Database · checked Sep 13, 2026
19	Wookify	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	2 contacts →
	Strong evidence “At Wookify, we're not your ordinary Software as a Service (SAAS) provider.” Source: RevenueBase Database · checked Sep 13, 2026
20	TIGIN	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Strong evidence “We're focused on bringing SaaS to market.” Source: RevenueBase Database · checked Sep 13, 2026
21	Expino Limited	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Strong evidence “Expino Limited is a company founded in 2017 which focuses on cloud based products mainly in SaaS model.” Source: RevenueBase Database · checked Sep 13, 2026
22	Saas Consultants	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Strong evidence “SaaS Consultants help ambitious businesses of all sizes build and scale their management, operations and teams to fulfil their SaaS potential and aspirations.” Source: RevenueBase Database · checked Sep 13, 2026
23	The Nocode CTO	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Indirect evidence “The NoCode CTO helps organisations adapt and thrive in a world of software-as-a-service.” Source: RevenueBase Database · checked Sep 13, 2026
24	Prospr	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Indirect evidence “Prospr is a marketplace for business software and services.” Source: RevenueBase Database · checked Sep 13, 2026
25	Platopus Retail	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Strong evidence “Grow your hospitality business with our fully integrated Saas platform.” Source: RevenueBase Database · checked Sep 13, 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: SaaS 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 SaaS companies.
Partial evidence: Its own public description names part of SaaS companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name SaaS 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 76 SaaS companies based in London, United Kingdom

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SaaS companies based in London, United Kingdom at a glance

As of Sep 13, 2026

33.9%Verified-email coverage

4.8%Mobile-number coverage

5.7Average contacts per company

1-10Median size (employees)

119.7%Largest-city concentration · London

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

1160–30

3031–60

161–90

090–180

0180+

Company record updated

Median 64.0d

00–30

19331–60

14361–90

6890–180

29180+

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 SaaS 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 “SaaS 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 SaaS 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 SaaS 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, 147 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 13, 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.

SaaS companies by metro in the United Kingdom

SaaS companies in London91

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 SaaS 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 SaaS companies are there based in London, United Kingdom?

RevenueBase identified 76 SaaS 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?

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

Which city has the most SaaS companies?

London leads with 91 headquartered companies, followed by Bristol (7) and Reading (5).

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 147 verified decision-maker contacts tracked across these 76 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 13, 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.