Company lists · Data refreshed September 2026

Top 25 SaaS implementation services based in London, United Kingdom

Name: SaaS implementation services 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 implementation services headquartered in London, United Kingdom as of September 2026 and tracks 1,415 professional contacts across them, including 553 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers SaaS implementation services 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

1,415Contacts tracked

553Verified emails

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The 25 largest SaaS implementation services based in London, United Kingdom

Ranked by team size

Top 25 of 112 SaaS implementation services 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 implementation services: 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	The Adaptavist Group	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1,001-5,000	254 contacts →
	Indirect evidence “We are experts at delivering innovative software, tailored solutions, and quality services across some of the world's most trusted technology ecosystems, including Atlassian, AWS…” Source: RevenueBase Database · checked Sep 29, 2026
2	Percipere	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	245 contacts →
	Indirect evidence “Percipere is a niche global consultancy, partnering companies in their evolution towards greater operational efficiency and profitability.” Source: RevenueBase Database · checked Sep 29, 2026
3	Dreams Technologies, UK & India	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	221 contacts →
	Indirect evidence “At Dreams Technologies, we’re more than software engineers, we’re digital transformation partners.” Source: RevenueBase Database · checked Sep 29, 2026
4	Marx Enterprise Transformation Architecture	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	49 contacts →
	Indirect evidence “Marx Group is a leading global AI fueled Solutions & Products firm with a solid framework of Enterprise Architecture as Service to master rapid changes.” Source: RevenueBase Database · checked Sep 29, 2026
5	1st 4 Connect Limited	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	38 contacts →
	Partial 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 29, 2026
6	Quantum-H	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	33 contacts →
	Partial evidence “Quantum-h is a full stack software as a service (SaaS) technology innovator that accelerates the adoption of emerging technologies for enterprises.” Source: RevenueBase Database · checked Sep 29, 2026
7	Market Cloud LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	21 contacts →
	Indirect evidence “Market Cloud helps transform digital potential into business reality.” Source: RevenueBase Database · checked Sep 29, 2026
8	Virtual Clarity Acquired	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	20 contacts →
	Indirect evidence “With a focus on digital transformation and implementing the best cloud systems, Virtual Clarity made IT-as-a-Service happen in the largest, most critical environments by aligning…” Source: RevenueBase Database · checked Sep 29, 2026
9	Iqlink	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	16 contacts →
	Indirect evidence “Supporting professional services firms with their requirements across setup, adoption, data migration, training, managed services and integrations.” Source: RevenueBase Database · checked Sep 29, 2026
10	Novacept	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	15 contacts →
	Partial evidence “Novacept is a product based SaaS company that has a team of pioneers and industry experts come together to address organisation’s real world problems.” Source: RevenueBase Database · checked Sep 29, 2026
11	Scalesops	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	15 contacts →
	Indirect evidence “ScalesOps is an agile digital transformation partner that delivers tailor-made solutions for companies in e-commerce, healthcare, social, and other industries.” Source: RevenueBase Database · checked Sep 29, 2026
12	Madx Digital	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	14 contacts →
	Partial 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 29, 2026
13	Digitalworks	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “Digital Works is a digital and software development company.” Source: RevenueBase Database · checked Sep 29, 2026
14	Tammwe Buildateam AI	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	12 contacts →
	Indirect evidence “Tammwe helps organisations unlock faster, smarter, and more cost-effective digital transformation.” Source: RevenueBase Database · checked Sep 29, 2026
15	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
16	Acumen BAY Consultancy Limited	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	9 contacts →
	Indirect evidence “Most organisations don't have a technology problem.” Source: RevenueBase Database · checked Sep 29, 2026
17	ADAPT	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	8 contacts →
	Indirect evidence “At Adapt, we're committed to advancing organisations through custom digital solutions.” Source: RevenueBase Database · checked Sep 29, 2026
18	Caprice Cloud Technologies	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	8 contacts →
	Indirect evidence “We provide High Quality & Low Cost Salesforce.com Solutions.” Source: RevenueBase Database · checked Sep 29, 2026
19	The Saas Jedi	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	5 contacts →
	Partial evidence “We are specialists in fitting popular SAAS tools to your business needs.” Source: RevenueBase Database · checked Sep 29, 2026
20	Untangle Tech	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	5 contacts →
	Indirect evidence “We are an IT services provider driving digital business growth through innovative technologies and data-driven strategies.” Source: RevenueBase Database · checked Sep 29, 2026
21	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
22	Cloudsaber	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
23	Mokora	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence “Mokora, Business Systems Delivery Partner We build the systems that let your business scale past what its spreadsheets can carry.” Source: RevenueBase Database · checked Sep 29, 2026
24	KRMG	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	2 contacts →
	Indirect evidence “Transform With Certainty KRMG drives digital transformation for enterprises across the UK, Middle East and GCC.” Source: RevenueBase Database · checked Sep 29, 2026
25	Clouderz	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Indirect evidence “Clouderz is willing to be your primary cloud partner who can help you implement what you desire on your environment easily.” 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 implementation services. 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 implementation services.
Partial evidence: Its own public description names part of SaaS implementation services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name SaaS implementation services. 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 implementation services based in London, United Kingdom

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SaaS implementation services based in London, United Kingdom at a glance

As of Sep 29, 2026

39.1%Verified-email coverage

12.6Average 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

1,001-5,000

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 implementation services, 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 implementation services”. 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 implementation services), 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 implementation services, 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, 553 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 implementation services, 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 implementation services are there based in London, United Kingdom?

RevenueBase identified 112 SaaS implementation services 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?

The Adaptavist Group, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most SaaS implementation services?

London leads the United Kingdom with 112 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 553 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.