Company lists · Data refreshed September 2026

Top 25 SaaS development agencies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 320 companies tracked

RevenueBase identified 320 SaaS development agencies headquartered in the United Kingdom as of September 2026 and tracks 2,036 professional contacts across them, including 439 with verified work emails. London is the largest hub.

This list covers SaaS development agencies headquartered in the 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

320Companies

2,036Contacts tracked

439Verified emails

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The 25 largest SaaS development agencies based in the United Kingdom

Ranked by team size

Top 25 of 320 SaaS development agencies based in the 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	Dorset Software	Partial evidence	Poole, United KingdomHQ checked Sep 29, 2026	51-200	111 contacts →
	Partial evidence “Operating since 1987, Dorset Software provides systems development capabilities to deliver industry leading technology.” Source: RevenueBase Database · checked Sep 29, 2026
3	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
4	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
5	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
6	Sapnagroup LTD	Indirect evidence	Reigate, United KingdomHQ checked Sep 29, 2026	51-200	36 contacts →
	Indirect evidence “We follow a simple philosophy: do the basics right, consistently, and the rest will follow.” Source: RevenueBase Database · checked Sep 29, 2026
7	RED River Software	Partial evidence	Horsham, United KingdomHQ checked Sep 29, 2026	11-50	30 contacts →
	Partial evidence “Keeping business ahead of the game" We're a software development company working with high-growth businesses, funded start-ups, investors, and organisations undergoing rapid…” Source: RevenueBase Database · checked Sep 29, 2026
8	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
9	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
10	Sparktech	Partial evidence	Leicester, United KingdomHQ checked Sep 29, 2026	11-50	20 contacts →
	Partial evidence “SparkTech is an engineering partner for SaaS startups that outgrow their MVP.” Source: RevenueBase Database · checked Sep 29, 2026
11	Zentive Group	Indirect evidence	Fareham, United KingdomHQ checked Sep 29, 2026	11-50	19 contacts →
	Indirect evidence “Founded in 2004, Zentive is an award-winning provider of cloud and on-premise software solutions.” Source: RevenueBase Database · checked Sep 29, 2026
12	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
13	Delisys Technologies	Indirect evidence	Nottingham, United KingdomHQ checked Sep 29, 2026	11-50	17 contacts →
	Indirect evidence “Empowering Businesses with Cloud, AI, and Automation.” Source: RevenueBase Database · checked Sep 29, 2026
14	Radweb	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 29, 2026	11-50	17 contacts →
	Indirect evidence “Radweb are an enthusiastic and passionate team of business leaders, software engineers, UI experts and marketing professionals based in Portsmouth, UK.” Source: RevenueBase Database · checked Sep 29, 2026
15	Ventureaxis Limited	Indirect evidence	Leeds, United KingdomHQ checked Sep 29, 2026	51-200	14 contacts →
	Indirect evidence “At Ventureaxis, we specialise in working with our clients to build robust, reliable and innovative software solutions.” Source: RevenueBase Database · checked Sep 29, 2026
16	Exadev	Indirect evidence	Gaerwen, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “ExaDev is an award winning software consultancy.” Source: RevenueBase Database · checked Sep 29, 2026
17	SI Digital	Indirect evidence	Southsea, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “We design and build websites and apps that bring clarity, efficiency, and brand impact to ambitious global businesses.” Source: RevenueBase Database · checked Sep 29, 2026
18	Kloudstack	Indirect evidence	Reading, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “Welcome KloudStack!” Source: RevenueBase Database · checked Sep 29, 2026
19	Teamweb	Partial evidence	Glasgow, United KingdomHQ checked Sep 29, 2026	11-50	12 contacts →
	Partial evidence “We build amazing SaaS products, both for our clients and ourselves.” Source: RevenueBase Database · checked Sep 29, 2026
20	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
21	Ap16 Limited	Partial evidence	York, United KingdomHQ checked Sep 29, 2026	11-50	11 contacts →
	Partial evidence “ap16 provide clients with world-class quality software development and support services.” Source: RevenueBase Database · checked Sep 29, 2026
22	Purple Mavens	Partial evidence	Solihull, United KingdomHQ checked Sep 29, 2026	11-50	11 contacts →
	Partial evidence “Purple Mavens is a UK based software development company offering software-based development solutions tailored to suit the customer needs with additional services like Quality…” Source: RevenueBase Database · checked Sep 29, 2026
23	Insight Software Development	Strong evidence	Edinburgh, United KingdomHQ checked Sep 29, 2026	11-50	10 contacts →
	Strong evidence “Insight Software Development helps teams move from in-house, install-based software and spreadsheets to modern, custom-built SaaS applications.” Source: RevenueBase Database · checked Sep 29, 2026
24	Individual Systems LTD	Partial evidence	Redditch, United KingdomHQ checked Sep 29, 2026	1-10	10 contacts →
	Partial evidence “INDIVIDUAL SYSTEMS LTD provides bespoke development services to a range of industry's, we are based at Systems House, Moons Park, Burnt Meadow Road, Redditch.” Source: RevenueBase Database · checked Sep 29, 2026
25	Atreon	Partial evidence	Kings Hill, United KingdomHQ checked Sep 29, 2026	11-50	8 contacts →
	Partial evidence “Atreon is a trusted UK-based software development company empowering businesses with custom software solutions.” 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 320 SaaS development agencies based in the United Kingdom

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SaaS development agencies based in the United Kingdom at a glance

As of Sep 29, 2026

21.6%Verified-email coverage

6.4Average contacts per company

1-10Median size (employees)

35.0%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

222

11-50

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 320 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 the 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 United Kingdom 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, 439 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.

SaaS development agencies by metro

SaaS development agencies in London112

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 the United Kingdom?

RevenueBase identified 320 SaaS development agencies headquartered in the 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 has the most SaaS development agencies?

London leads 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 439 verified decision-maker contacts tracked across these 320 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.