Company lists · Data refreshed September 2026

Top 25 Nonprofit software developers based in the United Kingdom

RevenueBase identified 58 nonprofit software developers headquartered in the United Kingdom as of September 2026 and tracks 531 professional contacts across them, including 231 with verified work emails and 43 with mobile numbers. London is the largest hub.

This list covers nonprofit software 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
58Companies
531Contacts tracked
231Verified emails
43Mobile numbers
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The 25 largest nonprofit software developers based in the United Kingdom

Ranked by team size
Top 25 of 58 nonprofit software developers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names nonprofit software developers: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
SmartimpactIndirect evidence
London, United KingdomHQ checked Sep 5, 202651-20068

“At smartimpact, we thrive on making great technology work for amazing organisations.”

Source: company website · checked Sep 5, 2026
2
Giveclarity.Org LTDPartial evidence
London, United KingdomHQ checked Sep 5, 202651-20061

“We are a multi-award winning team of 70 experts providing Salesforce.com cloud consultancy software services and apps (Clarity Data Transform, Clarity Gift Aid, Clarity Banking)…”

Source: company website · checked Sep 5, 2026
3
Hyphen8Indirect evidence
London, United KingdomHQ checked Sep 5, 202611-5035

“Hyphen8 is a Salesforce consultancy whose focus, and passion, is to work in partnership with non-profit organisations to transform the way they work.”

Source: company website · checked Sep 5, 2026
4
GeniustagsPartial evidence
London, United KingdomHQ checked Sep 5, 202611-5024

“GeniusTags is a software solutions company that was founded by entrepreneurs with long experience in the IT and humanitarian sectors.”

Source: company website · checked Sep 5, 2026
5
Social SyncIndirect evidence
York, United KingdomHQ checked Sep 5, 202611-5022

“Social Sync helps charities raise more through better supporter journeys.”

Source: company website · checked Sep 5, 2026
6
The Developer SocietyIndirect evidence
Birmingham, United KingdomHQ checked Sep 5, 202611-5020

“Dedicated to creating technology to make the world a better place.”

Source: company website · checked Sep 5, 2026
7
N3oIndirect evidence
London, United KingdomHQ checked Sep 5, 202611-5018

“We are a technology company focused on cloud-based solutions helping the not-for-profit sector achieve more to make the world a better place.”

Source: company website · checked Sep 5, 2026
8Worcester, United KingdomHQ checked Sep 5, 202611-5011

“Is your business software letting you down?”

Source: company website · checked Sep 5, 2026
9
Westwood ForsterPartial evidence
London, United KingdomHQ checked Sep 5, 202611-5011

“Driven by our mission to facilitate the missions of others to do more good, we've been building specialised software since 1990, with a focus on the Not-For-Profit sector.”

Source: company website · checked Sep 5, 2026
10
VolunteeroIndirect evidence
London, United KingdomHQ checked Sep 5, 202611-5010

“Save time managing volunteers whilst improving your volunteer engagement and retention.”

Source: company website · checked Sep 5, 2026
11London, United KingdomHQ checked Sep 5, 202611-508

“Gallery Partnership provides an entire suite of affordable IT services and software systems, empowering charities to focus on what’s most important - their cause.”

Source: company website · checked Sep 5, 2026
12
Impact BOXIndirect evidence
London, United KingdomHQ checked Sep 5, 20261-107

“Impact Box’s mission is to transform how the social sector uses technology.”

Source: company website · checked Sep 5, 2026
13
Carn Software LimitedPartial evidence
Coatbridge, United KingdomHQ checked Sep 5, 20261-106

“Carn Software was formed by the current Managing Director in October 1994, principally to service the software needs of the church and charity sector.”

Source: company website · checked Sep 5, 2026
14
Donorflex CRMIndirect evidence
Birmingham, United KingdomHQ checked Sep 5, 202611-505

“The donorflex CRM offers charities a robust platform to streamline their fundraising efforts.”

Source: company website · checked Sep 5, 2026
15
Third Sector DesignIndirect evidence
Tiverton, United KingdomHQ checked Sep 5, 20261-105

“Third Sector Design has a strong track record of helping non profits and political organisations maximise their impact through web technologies, having worked with over 50 clients…”

Source: company website · checked Sep 5, 2026
16Redbourn, United KingdomHQ checked Sep 5, 202611-505

“Redbourn was acquired by Fresche Solutions.”

Source: company website · checked Sep 5, 2026
17Orpington, United KingdomHQ checked Sep 5, 20261-104

“We build software designed around you!”

Source: company website · checked Sep 5, 2026
18
Prismaya CRMPartial evidence
London, United KingdomHQ checked Sep 5, 20261-104

“Prismaya CRM is a comprehensive customer relationship management platform designed specifically for charities, nonprofits, and non-governmental organizations (NGOs).”

Source: company website · checked Sep 5, 2026
19Shoreham-by-sea, United KingdomHQ checked Sep 5, 20261-104

“We help you make more impact on the world for yourself and for your customers.”

Source: company website · checked Sep 5, 2026
20
AssembleIndirect evidence
London, United KingdomHQ checked Sep 5, 202611-503

“Assemble assists organisations in bringing people and process together with one powerful solution.”

Source: company website · checked Sep 5, 2026
21
Data DevelopmentsPartial evidence
Wolverhampton, United KingdomHQ checked Sep 5, 202611-503

“Data Developments specialise in writing and developing software, specifically tailored for Faith organisations and Charities, for over 35 years.”

Source: company website · checked Sep 5, 2026
22
PorismPartial evidence
Reading, United KingdomHQ checked Sep 5, 20261-103

“Porism develops software to oil the wheels of democracy and make it easier for public bodies to enrich communities and the places where people live.”

Source: company website · checked Sep 5, 2026
23
Skynet Applied Systems LTDIndirect evidence
London, United KingdomHQ checked Sep 5, 20261-103

“Control your business from anywhere.”

Source: company website · checked Sep 5, 2026
24
DarlstonIndirect evidence
Norwich, United KingdomHQ checked Sep 5, 20261-102

“Darlston have been successfully delivering projects for charities and the UK government for over 12 years.”

Source: company website · checked Sep 5, 2026
25
Shared VisionIndirect evidence
Chipping Norton, United KingdomHQ checked Sep 5, 202611-502

“Founded more than two decades ago as Rux Burton Associates, we have worked with over 200 schools, universities and colleges spanning five continents.”

Source: company website · checked Sep 5, 2026

Showing 25 of 58 nonprofit software developers based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 231 reachable decision-makers.

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Nonprofit software developers based in the United Kingdom at a glance

As of Sep 5, 2026
1-10Median size (employees)
LondonLargest hub · 18 HQs
43Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
36
11-50
17
51-200
5

Verified emails by last verification

0–30
221
31–60
5
61–90
0
90–180
0
180+
5

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 nonprofit software developers, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “nonprofit software developers”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among nonprofit software 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 an evidence 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, 231 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 5, 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

How many nonprofit software developers are there based in the United Kingdom?

RevenueBase identified 58 nonprofit software 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?

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

Which city has the most nonprofit software developers?

London leads with 18 headquartered companies, followed by Birmingham (3) and Manchester (3).

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 231 verified decision-maker contacts tracked across these 58 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 5, 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 SmartSearch, 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.