Company lists · Data refreshed September 2026

Top 25 SaaS development agencies based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 112 companies tracked

RevenueBase identified 112 SaaS development agencies headquartered in London, United Kingdom as of September 2026 and tracks 887 professional contacts across them, including 127 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers SaaS development agencies 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 29, 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 29, 2026 86% judged on-target in blind review

112Companies

887Contacts tracked

127Verified emails

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The 25 largest SaaS development agencies based in London, United Kingdom

Ranked by team size

Top 25 of 112 SaaS development agencies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to SaaS development agencies: 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	Opinov8	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	154 contacts →
	Indirect evidence “Winner of the Best AI Company Award by The Netty Awards · Headquartered in London, powered by a worldwide team of engineers across Europe, Egypt, and the Americas.” Source: RevenueBase Database · checked Sep 29, 2026
2	Xynotech	Partial evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
3	Impressit	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	54 contacts →
	Partial evidence “A premium digital agency with an in-house team of tech experts, who build SaaS products, mobile and web applications for SMEs by using clean processes and the latest technologies…” Source: RevenueBase Database · checked Sep 29, 2026
4	Warrgyizmorsch	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	51 contacts →
	Partial evidence “Tailored ERP, CRM & SaaS that automates your operations and fuels measurable growth.” Source: RevenueBase Database · checked Sep 29, 2026
5	TGA Digital LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	23 contacts →
	Indirect evidence “TGA Digital is a software engineering consultancy focussed on delivering high quality software projects as well as consulting, due diligence, trouble shooting and fund raising.” Source: RevenueBase Database · checked Sep 29, 2026
6	Itouchvision	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
7	Softexpoit	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	18 contacts →
	Indirect evidence “Softexpoit's team of experts combines technical expertise and creativity to develop custom software, mobile app, and web app solutions that meet your specific business/official…” Source: RevenueBase Database · checked Sep 29, 2026
8	Vizrex Software Solutions	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	12 contacts →
	Indirect evidence “Vizrex Software Solutions builds custom software for startups, growing businesses, and complex operations.” Source: RevenueBase Database · checked Sep 29, 2026
9	Codescrum	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect 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 29, 2026
10	Miicon Solutions Limited	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence “Miicon Solutions is a modern technology company delivering innovative, scalable, and high-performance digital solutions across web, mobile, and cloud platforms.” Source: RevenueBase Database · checked Sep 29, 2026
11	Infini Corporation	Strong evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
12	Renav Technologies	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	4 contacts →
	Indirect evidence “At Renav, we help businesses move from fragmented systems to fully integrated digital platforms.” Source: RevenueBase Database · checked Sep 29, 2026
13	Nerdcow	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	4 contacts →
	Partial evidence “NerdCow is a web design agency for SaaS and B2B tech businesses.” Source: RevenueBase Database · checked Sep 29, 2026
14	Omnibyte Technologies	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	4 contacts →
	Strong evidence “Omnibyte Technologies is a UK-based software development company specialising in SaaS solutions and custom software development.” Source: RevenueBase Database · checked Sep 29, 2026
15	Cell 5	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	3 contacts →
	Partial evidence “Cell 5 is a UK-based, remote digital agency with a specialism in building start-up SaaS products from MVP through to scaling up.” Source: RevenueBase Database · checked Sep 29, 2026
16	JAIGO	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
17	ABCUM	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial 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 29, 2026
18	Armlon	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	2 contacts →
	Partial evidence “ARMLON is a full service software development agency in London, England providing consultancy and development solutions for start-ups and corporations globally.” Source: RevenueBase Database · checked Sep 29, 2026
19	Seertech Information Technologies Seertech IT	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “Seertech is a Birmingham based software development company which creates scalable, robust and innovative software solutions with a collaborative approach and commercial mindset.” Source: RevenueBase Database · checked Sep 29, 2026
20	Weird Sheep Labs	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “Software development and consulting work for SMEs in the science and engineering sectors.” Source: RevenueBase Database · checked Sep 29, 2026
21	Wookify	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “At Wookify, we're not your ordinary Software as a Service (SAAS) provider.” Source: RevenueBase Database · checked Sep 29, 2026
22	Prudent Pixel LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	1 contacts →
	Indirect evidence “The avant-garde of technology” Source: RevenueBase Database · checked Sep 29, 2026
23	TIGIN	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	1 contacts →
	Partial evidence “We're focused on bringing SaaS to market.” Source: RevenueBase Database · checked Sep 29, 2026
24	Poiema LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	1 contacts →
	Indirect evidence “London Based Software Consultancy” Source: RevenueBase Database · checked Sep 29, 2026
25	Product Story	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	1 contacts →
	Strong evidence “Product Story is a software development agency specializing in crafting innovative SaaS solutions using Ruby, Ruby on Rails, TypeScript, and Next.js.” Source: RevenueBase Database · checked Sep 29, 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 development agencies. 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 development agencies.
Partial evidence: Its own public description names part of SaaS development agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name SaaS development agencies. 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 112 SaaS development agencies based in London, United Kingdom

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SaaS development agencies based in London, United Kingdom at a glance

As of Sep 29, 2026

14.3%Verified-email coverage

7.9Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 112 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 SaaS development agencies, 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 development agencies”. 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 development agencies), 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 development agencies, 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, 127 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 29, 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 SaaS development agencies, 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 development agencies are there based in London, United Kingdom?

RevenueBase identified 112 SaaS development agencies 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?

Opinov8, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most SaaS development agencies?

London leads the United Kingdom with 112 headquartered companies, followed by Leeds (12) and Manchester (9).

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 127 verified decision-maker contacts tracked across these 112 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 29, 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.