Company lists · Data refreshed September 2026

Top 25 Sustainable software development firms based in London, United Kingdom

Name: Sustainable software development firms 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 177 companies tracked

RevenueBase identified 177 sustainable software development firms headquartered in London, United Kingdom as of September 2026 and tracks 11,063 professional contacts across them, including 5,331 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers sustainable software development firms 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

177Companies

11,063Contacts tracked

5,331Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest sustainable software development firms based in London, United Kingdom

Ranked by team size

Top 25 of 177 sustainable software development firms 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 sustainable software development firms: 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	ERM	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	5,001-10,000	9,119 contacts →
	Partial evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 29, 2026
2	Ricardo PLC	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1,001-5,000	670 contacts →
	Indirect evidence “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Source: RevenueBase Database · checked Sep 29, 2026
3	ISB Global	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	119 contacts →
	Partial evidence “ISB Global develops and implements software, Waste & Recycling One (WR1), that integrates, automates, and simplifies to drive greater operational efficiency and profitability for…” Source: RevenueBase Database · checked Sep 29, 2026
4	Alfa Energy An Edison Energy Company	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	88 contacts →
	Partial evidence “Alfa Energy Group (an Edison Energy company) is an international energy, sustainability and technology consultant partner with 200 employees over four international locations.” Source: RevenueBase Database · checked Sep 29, 2026
5	Ecoact Part Of Schneider Electric	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	69 contacts →
	Indirect evidence “EcoAct is now SE Advisory Services.” Source: RevenueBase Database · checked Sep 29, 2026
6	ERM Libryo	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	5,001-10,000	66 contacts →
	Indirect evidence “ERM Libryo is a trusted and pioneering part of ERM’s suite of digital solutions, designed to help organizations navigate complex regulatory landscapes and operational challenges…” Source: RevenueBase Database · checked Sep 29, 2026
7	Action Sustainability	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	62 contacts →
	Partial evidence “Recognised for its commitment to employees with a sought-after Best Companies “One To Watch” industry standard, Action Sustainability offers a 3-in-1 solution through…” Source: RevenueBase Database · checked Sep 29, 2026
8	Gemba Advantage	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	59 contacts →
	Strong evidence “Gemba Advantage make high-impact software that is secure, scalable and sustainable.” Source: RevenueBase Database · checked Sep 29, 2026
9	Eight Versa	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	42 contacts →
	Indirect evidence “At Eight Versa, we deliver a new direction for a balanced future.” Source: RevenueBase Database · checked Sep 29, 2026
10	Exlabs	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	40 contacts →
	Partial evidence “Exlabs is a one-stop software partner for companies in Energy and Natural Resources who are done with slow-moving vendors and generic solutions.” Source: RevenueBase Database · checked Sep 29, 2026
11	Scriptoria Sustainable Development Solutions	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	27 contacts →
	Strong evidence “Scriptoria is an award-winning sustainable development consultancy delivering effective solutions for international development and research programmes through four core teams…” Source: RevenueBase Database · checked Sep 29, 2026
12	Ninos Global Tech	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	27 contacts →
	Indirect evidence “At Ninos Global Technology, we are passionate about empowering businesses and individuals with cutting-edge digital solutions.” Source: RevenueBase Database · checked Sep 29, 2026
13	Logika Consultants LTD Part Of Logika Group	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	25 contacts →
	Strong evidence “At Logika Consultants Ltd, we believe that our future relies on environmental consultancy that supports progressive and sustainable development, and a healthier world.” Source: RevenueBase Database · checked Sep 29, 2026
14	Carbonquota	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	24 contacts →
	Indirect evidence “We are trusted experts in carbon measurement and reduction, specialising in packaging and print manufacturing, media and logistics sectors.” Source: RevenueBase Database · checked Sep 29, 2026
15	Olive JAR Digital	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	20 contacts →
	Indirect evidence “Olive Jar Digital has extensive experience in building highly secure, resilient, highly available and scalable websites.” Source: RevenueBase Database · checked Sep 29, 2026
16	Jags Consultancy LTD	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	15 contacts →
	Strong evidence “Jags Consultancy Limited is an IT consulting and software development company founded in 2015, headquartered out of UK.” Source: RevenueBase Database · checked Sep 29, 2026
17	Greenstone	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Strong evidence “At Greenstone, we provide award-winning software solutions and services enabling organisations to advance their sustainability strategies and become responsible businesses.” Source: RevenueBase Database · checked Sep 29, 2026
18	Vizrex Software Solutions	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	12 contacts →
	Partial evidence “Vizrex Software Solutions builds custom software for startups, growing businesses, and complex operations.” Source: RevenueBase Database · checked Sep 29, 2026
19	Ftsquared	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	10 contacts →
	Strong evidence “From concept to delivery, we employ high-performing strategies that manage your development ventures, responsibly and sustainably, delivering predictable and repeatable results” Source: RevenueBase Database · checked Sep 29, 2026
20	Demarq	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	9 contacts →
	Indirect evidence “Demarq is an independent solutions consultancy providing bespoke applications to our growing customer base.” Source: RevenueBase Database · checked Sep 29, 2026
21	WEEVA	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	9 contacts →
	Partial evidence “Weeva is a SaaS platform that enables tourism businesses to adopt measurable and holistic sustainability practices to improve operational efficiency and build resilience, driving…” Source: RevenueBase Database · checked Sep 29, 2026
22	Luckhurst Digital	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	9 contacts →
	Partial evidence “Luckhurst Digital is a market leading Technology and Sustainability focused Consultancy which assists your organisation with the sourcing top Tech talent, whilst also making your…” Source: RevenueBase Database · checked Sep 29, 2026
23	Luminara Software	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	7 contacts →
	Strong evidence “Luminara Software Limited is a software consultancy and development based in London, United Kingdom.” Source: RevenueBase Database · checked Sep 29, 2026
24	Equipoise	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	7 contacts →
	Partial evidence “Equipoise is a technology-enabled sustainable procurement consultancy and learning provider.” Source: RevenueBase Database · checked Sep 29, 2026
25	Digitals OYT	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	5 contacts →
	Strong evidence “Digitals On Your Terms provides and manages top quality software development teams on terms that work for you” 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: sustainable software development firms. 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 sustainable software development firms.
Partial evidence: Its own public description names part of sustainable software development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable software development firms. 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 177 sustainable software development firms based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 5,331 reachable decision-makers.

Free signup · no credit card

View the full list →

Sustainable software development firms based in London, United Kingdom at a glance

As of Sep 29, 2026

48.2%Verified-email coverage

62.5Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

111

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 177 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 sustainable software development firms, 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 “sustainable software development firms”. 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 sustainable software development firms), 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 sustainable software development firms, 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, 5,331 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 sustainable software development firms, 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 sustainable software development firms are there based in London, United Kingdom?

RevenueBase identified 177 sustainable software development firms 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?

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

Which city in the United Kingdom has the most sustainable software development firms?

London leads the United Kingdom with 177 headquartered companies, followed by Bristol (12) and Manchester (12).

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 5,331 verified decision-maker contacts tracked across these 177 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.

Ready to reach these companies? Verified emails and direct dials for all 177 sustainable software development firms based in London, United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Sustainable software development firms by geography

Browse the directory

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.