Company lists · Data refreshed September 2026

Top 25 Custom CRM developers based in the United Kingdom

Name: Custom CRM developers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 258 companies tracked

RevenueBase identified 258 custom CRM developers headquartered in the United Kingdom as of September 2026 and tracks 2,025 professional contacts across them, including 620 with verified work emails. London is the largest hub.

This list covers custom CRM developers 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 28, 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 28, 2026 86% judged on-target in blind review

258Companies

2,025Contacts tracked

620Verified emails

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The 25 largest custom CRM developers based in the United Kingdom

Ranked by team size

Top 25 of 258 custom CRM developers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to custom CRM 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	Orchestra	Indirect evidence	Woolwich, United KingdomHQ checked Sep 28, 2026	n/a	129 contacts →
	Indirect evidence “Founded in 2007, we are independent, knowledgeable and reliable.” Source: RevenueBase Database · checked Sep 28, 2026
2	Acteol	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	85 contacts →
	Strong evidence “We're an award-winning CRM agency who specialise in knitting together complex and disparate data to create a powerful single customer view that can deliver significant returns to…” Source: RevenueBase Database · checked Sep 28, 2026
3	REDK	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	78 contacts →
	Partial evidence “redk is a CRM consulting company with a difference.” Source: RevenueBase Database · checked Sep 28, 2026
4	Flourish CRM	Strong evidence	Bristol, United KingdomHQ checked Sep 28, 2026	51-200	70 contacts →
	Strong evidence “Flourish is a specialist Customer Relationship Marketing (CRM) agency based in the UK and Dubai that’s delivering CRM for the real world.” Source: RevenueBase Database · checked Sep 28, 2026
5	Workbooks CRM	Strong evidence	Reading, United KingdomHQ checked Sep 28, 2026	51-200	64 contacts →
	Strong evidence “Workbooks is a CRM SaaS platform used by growing companies to run their business and engage effectively with their customers.” Source: RevenueBase Database · checked Sep 28, 2026
6	Optimiser	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
7	Capsule	Partial evidence	Manchester, United KingdomHQ checked Sep 28, 2026	11-50	55 contacts →
	Partial evidence “Capsule was launched in 2009 following the founders' frustration with existing CRM services that were either overly simplistic or far too complex for most businesses.” Source: RevenueBase Database · checked Sep 28, 2026
8	Warrgyizmorsch	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	51 contacts →
	Partial evidence “Tailored ERP, CRM & SaaS that automates your operations and fuels measurable growth.” Source: RevenueBase Database · checked Sep 28, 2026
9	Aspin B2B Ecommerce & CRM Catalogue Ordering APP	Partial evidence	Romsey, United KingdomHQ checked Sep 28, 2026	11-50	35 contacts →
	Partial evidence “Aspin provides order-taking focused CRM software for distributors and wholesalers.” Source: RevenueBase Database · checked Sep 28, 2026
10	Dynamica Labs	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Partial evidence “Dynamica Labs is one of the oldest Dynamics CRM Partners and one of a very few companies with ISO 9001 Quality Management System certification for Dynamics CRM project delivery…” Source: RevenueBase Database · checked Sep 28, 2026
11	WEB Alliance Limited	Partial evidence	Northampton, United KingdomHQ checked Sep 28, 2026	11-50	30 contacts →
	Partial evidence “Are you still using Cumbersome Excel Spreadsheets to manually track your leads, customers and invoices?” Source: RevenueBase Database · checked Sep 28, 2026
12	Goggle Software LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	29 contacts →
	Partial evidence “We build bespoke job management and CRM systems for construction and field service businesses.” Source: RevenueBase Database · checked Sep 28, 2026
13	Concep	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “We live and breathe relationship marketing.” Source: RevenueBase Database · checked Sep 28, 2026
14	Gold-Vision CRM	Strong evidence	Northampton, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Strong evidence “Gold-Vision CRM is a highly configurable, user-friendly customer relationship management (CRM) platform designed to unify and streamline sales and marketing processes for…” Source: RevenueBase Database · checked Sep 28, 2026
15	Spotdev	Partial evidence	Bath, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “When you don't trust your CRM, your systems don't talk to each other, and your reports are nonsense, it's time to call SpotDev.” Source: RevenueBase Database · checked Sep 28, 2026
16	Cantata	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Strong evidence “Cantata is the UK’s leading independent CRM specialist consultancy, helping organisations to gain the most from customer and stakeholder management.” Source: RevenueBase Database · checked Sep 28, 2026
17	Collier Pickard LTD	Partial evidence	Sundridge, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “Collier Pickard is an independent CRM and process management consultancy, helping businesses optimise their operations through CRM solutions.” Source: RevenueBase Database · checked Sep 28, 2026
18	Flowbird LTD	Partial evidence	Ashford, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “We are a CRM and automation agency that keeps things simple.” Source: RevenueBase Database · checked Sep 28, 2026
19	Avrion	Partial evidence	Stevenage, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “We deliver software solutions that help our customers work smarter using technologies to streamline operations, improve performance, and gain long-term scalable growth.” Source: RevenueBase Database · checked Sep 28, 2026
20	Intellicore LTD	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Aberdeen’s Intellicore is a specialist bespoke software development business that provides solutions to the practical issues faced by our clients in the daily running of their…” Source: RevenueBase Database · checked Sep 28, 2026
21	Success With Systems	Indirect evidence	Brighton, United KingdomHQ checked Sep 28, 2026	1-10	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
22	Akarigo	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Strong evidence “We are an international team of CRM specialists with over 20 years experience and have developed outstanding expertise in delivering Client Relationship Management (CRM) solutions…” Source: RevenueBase Database · checked Sep 28, 2026
23	Giig Hire	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	13 contacts →
	Partial evidence “The Recruitment CRM landscape tends to favour the "Giants." The +200 seat corporate agencies.” Source: RevenueBase Database · checked Sep 28, 2026
24	Fibrecrm	Indirect evidence	Redruth, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “Our core purpose is to make accountants’ lives easier.” Source: RevenueBase Database · checked Sep 28, 2026
25	Evorio	Partial evidence	Odiham, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “Evorio provides world class CRM solutions to businesses of all sizes and sectors.” Source: RevenueBase Database · checked Sep 28, 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: custom CRM 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 custom CRM developers.
Partial evidence: Its own public description names part of custom CRM developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom CRM 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 25 of 258 custom CRM developers based in the United Kingdom

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Custom CRM developers based in the United Kingdom at a glance

As of Sep 28, 2026

30.6%Verified-email coverage

7.8Average contacts per company

1-10Median size (employees)

28.7%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

161

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 258 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 custom CRM 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 the United Kingdom whose own description of what they do matches “custom CRM 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 custom CRM 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 custom CRM developers, 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, 620 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 28, 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.

Custom CRM developers by metro

Custom CRM developers in London74

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 custom CRM 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 custom CRM developers are there based in the United Kingdom?

RevenueBase identified 258 custom CRM developers 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?

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

Which city has the most custom CRM developers?

London leads with 74 headquartered companies, followed by Manchester (8) and Leeds (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 620 verified decision-maker contacts tracked across these 258 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 28, 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.