Company lists · Data refreshed September 2026
Top 25 Building efficiency venture firms worldwide
RevenueBase identified 602 building efficiency venture firms worldwide as of September 2026 and tracks 9,373 professional contacts across them, including 3,815 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.
This list covers building efficiency venture firms worldwide, 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 16, 2026. Country and city lists for building efficiency venture firms follow the table.
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 building efficiency venture firms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,213 contacts → | ||||
Indirect evidence “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 899 contacts → | ||||
Partial evidence “Venture capital (VC) is a type of private equity financing provided by investors to early-stage, high-potential, and high-risk startups or growing companies.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 321 contacts → | ||||
Partial evidence “The Alchemist Accelerator is a venture-backed initiative focused on accelerating the development of seed-stage ventures that monetize from enterprises (not consumers).” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 247 contacts → | ||||
Partial evidence “NextGen Venture Partners works with over 1,800 Venture Partners to invest $1 million in seed stage companies and $2 million to $10 million in companies with more than $10 million…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 196 contacts → | ||||
Indirect evidence “HASI invests in sustainable infrastructure assets advancing the energy transition.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 186 contacts → | ||||
Partial evidence “WeInvest is a Next Generation Venture Builder that creates Early-Stage VC Funds based on a proprietary methodology to launch startups per year by leveraging a global ecosystem of…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 171 contacts → | ||||
Partial evidence “Eclipse invests in entrepreneurs building the next generation of companies in the physical economy, the industries that shape resilience, competitiveness, and security.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 159 contacts → | ||||
Indirect evidence “Breakthrough Energy backs companies developing the next generation of clean energy solutions.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 155 contacts → | ||||
Indirect evidence “Die PAUL Tech AG mit Sitz in Mannheim macht Bestandsimmobilien grün und werthaltig.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 133 contacts → | ||||
Strong evidence “Sutter Hill Ventures has financed technology-based start-ups and assisted entrepreneurs in building market-leading companies since 1962.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 123 contacts → | ||||
Indirect evidence “Polaron has defined excellence in Canada’s renewable energy sector since 2013, with proven staying power amid a fast paced industry and a vast portfolio of over installations.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 109 contacts → | ||||
Partial evidence “FA Technology Ventures is an independent, established venture capital firm.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 89 contacts → | ||||
Partial evidence “In 2019, we started building profitable startups from scratch.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 80 contacts → | ||||
Partial evidence “We are a multinational venture builder that uses customized investment models for companies that need to innovate to stay ahead of their competitors, sharing the risks of the…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 78 contacts → | ||||
Indirect evidence “Reneo is a leading asset and investment management platform for manage-to-green strategies.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 60 contacts → | ||||
Indirect evidence “GreenGen is a global leader in energy and sustainability solutions, empowering organizations to Operate in the Green®.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 57 contacts → | ||||
Partial evidence “27pilots helps companies to benefit strategically from startups through a breakthrough corporate venturing tool: The Venture Client model.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 53 contacts → | ||||
Indirect evidence “Inergia was founded in 2003 with the strategic diversification of the Santarelli group, a leader in Italy’s real estate industry.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 52 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 52 contacts → | ||||
Strong evidence “Bes-Tech has been a leader in energy efficient building systems technologies for the past nine years.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 49 contacts → | ||||
Indirect evidence “Saxovent is a Berlin-based developer of projects in the fields of renewable energy, real estate and agriculture, with a track record of over twenty years of success.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 49 contacts → | ||||
Partial evidence “Real estate is under pressure: a whopping 97% of buildings are energy inefficient.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 43 contacts → | ||||
Partial evidence “We are a venture builder dedicated to turning meaningful ideas into incredible endeavors.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 42 contacts → | ||||
Indirect evidence “AlleyCorp builds and invests in transformative companies for the present and future in New York.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 41 contacts → | ||||
Indirect evidence “Greenfield specialise in the investment, development and delivery of sustainable and renewable-led infrastructure projects.” Source: RevenueBase Database · checked Sep 16, 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: building efficiency venture 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 building efficiency venture firms.
- Partial evidence
- Its own public description names part of building efficiency venture firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name building efficiency venture 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 602 building efficiency venture firms worldwide
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Building efficiency venture firms worldwide at a glance
As of Sep 16, 2026Companies by employee count
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 building efficiency venture 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.
- Coverage
- 8 countries, largest first: the United States, the United Kingdom, Germany, Canada, Italy, Brazil, India, the Netherlands. Country and city lists for building efficiency venture firms are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “building efficiency venture 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 building efficiency venture 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 building efficiency venture firms, and records with no verified work email.
- 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, 3,815 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 16, 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.
Building efficiency venture firms by location
8 lists · largest firstEvery Building efficiency venture firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Building efficiency venture firms based in the United States272
- Building efficiency venture firms based in the United Kingdom91
- Building efficiency venture firms based in Germany53
- Building efficiency venture firms based in Canada47
- Building efficiency venture firms based in Italy40
- Building efficiency venture firms based in Brazil35
- Building efficiency venture firms based in India35
- Building efficiency venture firms based in the Netherlands29
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 building efficiency venture 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 building efficiency venture firms are there worldwide?
RevenueBase identified 602 building efficiency venture firms worldwide 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?
Mckinstry, headquartered in Seattle, tops this list with the largest team on record.
Which country has the most building efficiency venture firms?
The United States leads with 272 companies, followed by the United Kingdom (91) and Germany (53). Every building efficiency venture firms list by country and city is linked on this page.
Which city has the most building efficiency venture firms?
London leads with 65 headquartered companies, followed by New York (26) and San Francisco (20).
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 3,815 verified decision-maker contacts tracked across these 602 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 16, 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.