Company lists · Data refreshed September 2026

Top 25 Impact venture capital firms based in Houston, United States

Name: Impact venture capital firms based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 59 companies tracked

RevenueBase identified 59 impact venture capital firms headquartered in Houston, United States as of September 2026 and tracks 285 professional contacts across them, including 85 with verified work emails. New York is the largest hub.

This list covers impact venture capital firms headquartered in Houston, United States, 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 3, 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 3, 2026 86% judged on-target in blind review

59Companies

285Contacts tracked

85Verified emails

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The 25 largest impact venture capital firms based in Houston, United States

Ranked by team size

Top 25 of 59 impact venture capital firms based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names impact venture capital firms: 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.
#	Company	Headquarters	Employees	Contacts
1	Mercury FundStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	11-50	48
	“Mercury fund is an early-stage venture capital firm investing in disruptive AI and blockchain startups outside Silicon Valley.” Source: company website · checked Sep 3, 2026
2	SpacefundStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	23
	“SpaceFund is a Venture Capital firm focused on supporting and investing in the growth of the space economy.” Source: company website · checked Sep 3, 2026
3	NEW Climate Ventures NCVStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	16
	“New Climate Ventures (NCV) is an early-stage venture capital firm investing in the future of how we produce, power, and consume.” Source: company website · checked Sep 3, 2026
4	Curate CapitalIndirect evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	13
	“Less than 2% of all VC dollars go to female-founded companies.” Source: company website · checked Sep 3, 2026
5	Innovest AfrikaStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	12
	“Innovest Afrika is a Venture Platform accelerating African innovation and entrepreneurship by connecting founders of African descent with capital, mentorship, and global markets.” Source: company website · checked Sep 3, 2026
6	Summit Capital GroupPartial evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	11-50	10
	“Summit Capital Group is a Houston-based Real Estate Investment Firm partnering with accredited investors and entrepreneurs to build long-term financial strength.” Source: company website · checked Sep 3, 2026
7	Devland InnovationIndirect evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	10
	“Devland is a early stage fund investing in new frontier innovation and market disrupting business models.” Source: company website · checked Sep 3, 2026
8	Tupper Lake PartnersStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	11-50	7
	“Tupper Lake Partners is a Venture Capital and Investment Management firm formed in 2020 comprised of former energy & technology CEOs that bring their experience (and personal…” Source: company website · checked Sep 3, 2026
9	Ecosphere VenturesPartial evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	7
	“Ecosphere Ventures is a Houston-based Pre-Seed through late-Seed stage fund focused on investing in transformative climatetech and sustainability solutions in the U.S.” Source: company website · checked Sep 3, 2026
10	South Loop VenturesPartial evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	6
	“Investing in remarkable founders of color who drive change, innovation and impact.” Source: company website · checked Sep 3, 2026
11	Small Ventures USA LLCStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	11-50	6
	“Small Ventures USA, LP (SMV) is a venture capital and private equity firm founded by William O.” Source: company website · checked Sep 3, 2026
12	HX Venture FundStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	6
	“HX Venture Fund is a venture capital fund of funds that creates a multiplier effect by linking the transformational power of world-class corporations, technology innovation, and…” Source: company website · checked Sep 3, 2026
13	Beam EarthIndirect evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	11-50	5
	“A clean technology-centric ecosystem, Beam Earth provides funding for environmentally-aligned businesses and services across the investment themes of clean energy, sustainability…” Source: company website · checked Sep 3, 2026
14	The JStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	11-50	5
	“A Houston-based and founder-led venture studio providing strategy, operational support, relationships, and capital to build impactful companies.” Source: company website · checked Sep 3, 2026
15	Climate Impact CapitalStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	11-50	4
	“Climate Impact Capital (CIC) is an early stage focused venture capital group who sees the need for financial institutions to take a larger role in addressing climate change and…” Source: company website · checked Sep 3, 2026
16	Mitchell CompaniesIndirect evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	3
	“At Mitchell Companies, we invest in companies we believe in.” Source: company website · checked Sep 3, 2026
17	Carnrite VenturesStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	3
	“Carnrite Ventures is a venture capital firm that invests in technology companies across the United States.” Source: company website · checked Sep 3, 2026
18	NoverramIndirect evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	3
	“Noverram is a proud member of the United Nations Global Compact - United States Country Network A new world requires new ideas.” Source: company website · checked Sep 3, 2026
19	Fastbreak FundStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	2
	“Venture Capital” Source: company website · checked Sep 3, 2026
20	Dream BIG Ventures LLCPartial evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	2
	“Fueling Innovation & Inclusion for a Sustainable Future At Dream Big Ventures, we believe it's never too late to chase your dreams.” Source: company website · checked Sep 3, 2026
21	LeadologyStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	2
	“Leadology, a venture capital firm specializing in seed funding, mid-stage investments, and business turnaround consulting.” Source: company website · checked Sep 3, 2026
22	Dealbench, LLCIndirect evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	1
	“DealBench is an early stage investor based in Houston, Texas and Montecito, California.” Source: company website · checked Sep 3, 2026
23	Fathom FundIndirect evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	1
	“Fathom Fund, based in Houston, supports pioneering startups tackling the world’s toughest challenges through the intersection of science, engineering, and innovation.” Source: company website · checked Sep 3, 2026
24	369gpPartial evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	1
	“369 Growth Partners (369GP) is a global venture firm backing founders who build with purpose and precision.” Source: company website · checked Sep 3, 2026
25	Carbonexus LLCStrong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	1-10	1
	“Carbon-Focused Venture Capital” Source: company website · checked Sep 3, 2026

Showing 25 of 59 impact venture capital firms based in Houston, United States

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Impact venture capital firms based in Houston, United States at a glance

As of Sep 3, 2026

1-10Median size (employees)

New YorkLargest hub · 558 HQs

Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

11-50

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 59 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 impact venture capital firms, 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 Houston, United States whose own description of what they do matches “impact venture capital firms”. 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 impact venture capital firms, and records with no verified work email. Companies headquartered outside Houston 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, 85 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 3, 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.

Impact venture capital firms by metro in the United States

Frequently asked

How many impact venture capital firms are there based in Houston, United States?

RevenueBase identified 59 impact venture capital firms headquartered in Houston, United States 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?

Mercury Fund, headquartered in Houston, tops this list with the largest team on record.

Which city has the most impact venture capital firms?

New York leads with 558 headquartered companies, followed by San Francisco (518) and Los Angeles (180).

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 85 verified decision-maker contacts tracked across these 59 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 3, 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.