Company lists · Data refreshed September 2026
Top 25 Sustainable business venture capital companies based in London, United Kingdom
RevenueBase identified 144 sustainable business venture capital companies headquartered in London, United Kingdom as of September 2026 and tracks 1,261 professional contacts across them, including 494 with verified work emails. Across the United Kingdom, London is the largest hub for this category.
This list covers sustainable business venture capital companies 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.
The 25 largest sustainable business venture capital companies based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 119 contacts → | ||||
Indirect evidence “UnLtd's mission is to reach out and unleash the energies of people who can transform the world in which they live.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 112 contacts → | ||||
Partial evidence “Index Ventures partners with exceptional entrepreneurs – those with unique insight who are intrinsically driven to make their vision a reality.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 96 contacts → | ||||
Strong evidence “Octopus Ventures, part of Octopus Group, is one of the largest and most active venture capital investors in the UK and Europe.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 84 contacts → | ||||
Indirect evidence “We finance social change.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 32 contacts → | ||||
Partial evidence “Bethnal Green Ventures is Europe’s leading early-stage tech for good VC.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 29 contacts → | ||||
Strong evidence “Founded in 2005, ETF Partners (The Environmental Technologies Fund) stands as Europe's original venture capital firm dedicated to sustainability and impact investing.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 28 contacts → | ||||
Indirect evidence “The VC backing the innovators who are transforming our relationship with the built world and its impact on people, business, and the environment.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 23 contacts → | ||||
Indirect evidence “We are the investor-partner of choice for ambitious founders growing brand legends that make people’s lives healthier, happier, and more fulfilling, while helping them minimise…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 21 contacts → | ||||
Indirect evidence “Empowering Founders to Flourish The way we experience healthcare, live consciously, work productively, shop experientially and grow our wealth is transforming at rapid pace.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 19 contacts → | ||||
Indirect evidence “We back founders at pre-seed, seed and series A stages.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 18 contacts → | ||||
Indirect evidence “Investing in companies to help create A Better Tomorrow™.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 16 contacts → | ||||
Partial evidence “At Exceptional Ventures, our motto is Believing in Believers.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 13 contacts → | ||||
Indirect evidence “CGF invest in tech innovations that reduce greenhouse gas emissions or improve resource efficiency across power, transport, industry, buildings, waste and water.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 13 contacts → | ||||
Indirect evidence “We believe the next generation of unicorns will be those in the business of fixing the planet.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 12 contacts → | ||||
Strong evidence “Pact is an early-stage venture capital fund partnering with mission-driven founders who are building technology to solve the world's most pressing challenges.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 12 contacts → | ||||
Partial evidence “Sustainable Times, part of Sustainable Media Group is a media platform and community that delivers essential resources and timely news, providing the crucial knowledge and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 10 contacts → | ||||
Strong evidence “Sussex Place Ventures is an early-stage venture capital investor that backs entrepreneurs building software companies with strong intellectual property (IP) across B2B SaaS…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 10 contacts → | ||||
Strong evidence “SPIN VENTURES (https://spin.vc/) Deploys capital into ventures enabling regenerative and circular systems across fashion and consumer industries.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 9 contacts → | ||||
Indirect evidence “Since 2008, Social Tech Trust has been building an inclusive impact ecosystem where founders with lived experience can shape tech for social and environmental good.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 8 contacts → | ||||
Indirect evidence “Greensphere excels in scaling engineered and nature-based technological solutions to solve some of the biggest systemic risks facing our generation.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 8 contacts → | ||||
Partial evidence “Blume Equity is a climate-tech growth equity firm with offices in London and Amsterdam focusing on companies driving sustainable outcomes for planet and people.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 8 contacts → | ||||
Strong evidence “Volta Circle is an evergreen venture capital fund dedicated to investing in technology-driven solutions that transform traditional linear economic systems into sustainable…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 8 contacts → | ||||
Strong evidence “Two Magnolias is a UK based venture capital fund investing in early stage British based businesses who are finding solutions in sustainability and human health.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 7 contacts → | ||||
Partial evidence “Westerly Winds is an emerging growth stage venture business located between the USA and the UK.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 7 contacts → | ||||
Indirect evidence “Entrepreneurs Backing Entrepreneurs.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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 business venture capital companies. 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 business venture capital companies.
- Partial evidence
- Its own public description names part of sustainable business venture capital companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name sustainable business venture capital companies. 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 144 sustainable business venture capital companies based in London, United Kingdom
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Sustainable business venture capital companies based in London, United Kingdom at a glance
As of Sep 29, 2026Companies by employee count
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 144 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 business venture capital companies, 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 business venture capital companies”. 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 business venture capital companies), 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 business venture capital companies, 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, 494 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 business venture capital companies, 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 business venture capital companies are there based in London, United Kingdom?
RevenueBase identified 144 sustainable business venture capital companies 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?
UNLTD, headquartered in London, tops this list with the largest team on record.
Which city in the United Kingdom has the most sustainable business venture capital companies?
London leads the United Kingdom with 144 headquartered companies, followed by Edinburgh (5) and Manchester (4).
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 494 verified decision-maker contacts tracked across these 144 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.
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