Company lists · Data refreshed September 2026

Top 24 SaaS platform developers based in London, United Kingdom

Name: SaaS platform developers 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 89 companies tracked

RevenueBase identified 89 SaaS platform developers headquartered in London, United Kingdom as of September 2026 and tracks 604 professional contacts across them, including 133 with verified work emails and 25 with mobile numbers. London is the largest hub.

This list covers SaaS platform developers 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

89Companies

604Contacts tracked

133Verified emails

25Mobile numbers

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The 24 largest SaaS platform developers based in London, United Kingdom

Ranked by team size

Top 24 of 89 SaaS platform developers 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 platform developers: 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	Hornbill	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	85 contacts →
	Indirect evidence “Hornbill is an innovator of cloud-based business collaboration technology and applications that engage teams, optimise operations and deliver better customer experiences.” Source: RevenueBase Database · checked Sep 13, 2026
2	Optimiser	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
3	Ascendx	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	22 contacts →
	Partial 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 13, 2026
4	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
5	Robosme	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	15 contacts →
	Indirect evidence “Robosme - CRM to Win Easy to use cloud CRM that automates your business and benefits every process you touch the customer.” Source: RevenueBase Database · checked Sep 13, 2026
6	AIRPA	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	10 contacts →
	Partial evidence “AIRPA brings together market-leading apps and processes, covering all of your business functions, and connecting them under one integrated, intuitive platform.” Source: RevenueBase Database · checked Sep 13, 2026
7	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
8	Smarty Software	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
9	Customeros	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	8 contacts →
	Partial evidence “A proactive CRM designed for modern SaaS.” Source: RevenueBase Database · checked Sep 13, 2026
10	Zigaflow	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
11	Entranet Cloud Platform	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
12	Infini Corporation	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	6 contacts →
	Partial evidence “Infini is an app development company, delivering bespoke SaaS solutions to SME's and enterprise clients.” Source: RevenueBase Database · checked Sep 13, 2026
13	Rocketvan	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	5 contacts →
	Strong evidence “We are a multi-skilled team with bases in London and Barcelona with the one-focused mission of creating transformative SaaS & Web App platforms.” Source: RevenueBase Database · checked Sep 13, 2026
14	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
15	Shoonyata	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	4 contacts →
	Indirect evidence “Shoonyata's mission is to make power of innovation and software affordable to all.” Source: RevenueBase Database · checked Sep 13, 2026
16	Omnibyte Technologies	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	4 contacts →
	Partial evidence “Omnibyte Technologies is a UK-based software development company specialising in SaaS solutions and custom software development.” Source: RevenueBase Database · checked Sep 13, 2026
17	allin1.app	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
18	Bluespidy	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
19	Samewave	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	3 contacts →
	Indirect evidence “We are a new breed of business management software that banishes bad meetings, increases productivity & drives your business forward.” Source: RevenueBase Database · checked Sep 13, 2026
20	ABCUM	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	2 contacts →
	Indirect evidence “Abcum is a tech company which focuses on the development of software-as-a-service applications for businesses - catering for enterprises, member organisations, associations, and…” Source: RevenueBase Database · checked Sep 13, 2026
21	TIGIN	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Partial evidence “We're focused on bringing SaaS to market.” Source: RevenueBase Database · checked Sep 13, 2026
22	Expino Limited	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Partial 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
23	Chirambattu Limited	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Indirect evidence “Chirambattu is motivated by the belief that great experiences build great businesses.” Source: RevenueBase Database · checked Sep 13, 2026
24	Synmek LTD	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Partial evidence “Building powerful, scalable SaaS & Web Apps At Synmek, we partner with startups, small businesses, and B2B teams to design and develop custom digital products that scale.” 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 platform developers. 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 platform developers.
Partial evidence: Its own public description names part of SaaS platform developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name SaaS platform developers. 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 24 of 89 SaaS platform developers based in London, United Kingdom

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SaaS platform developers based in London, United Kingdom at a glance

As of Sep 13, 2026

22.0%Verified-email coverage

4.1%Mobile-number coverage

6.8Average contacts per company

1-10Median size (employees)

102.2%Largest-city concentration · London

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Freshness & accuracy

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

Email last verified

Median 16.0d

1130–30

1831–60

261–90

090–180

0180+

Company record updated

Median 75.0d

00–30

21231–60

27761–90

9490–180

21180+

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 platform developers, 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 platform developers”. 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 platform developers), 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 platform developers, 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, 133 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 platform developers by metro in the United Kingdom

SaaS platform developers 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 platform developers, 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 platform developers are there based in London, United Kingdom?

RevenueBase identified 89 SaaS platform developers 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?

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

Which city has the most SaaS platform developers?

London leads with 91 headquartered companies, followed by Manchester (6) and Bristol (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 133 verified decision-maker contacts tracked across these 89 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.