Company lists · Data refreshed September 2026

Top 21 Environmental sustainability consulting firms based in Philadelphia, United States

Name: Environmental sustainability consulting firms based in Philadelphia, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 45 companies tracked

RevenueBase identified 45 company matches for environmental sustainability consulting firms associated with Philadelphia, United States as of September 2026 and tracks 304 professional contacts across them, including 80 with verified work emails. Across the United States, New York is the largest hub for this category (237 companies); Philadelphia has 45.

This list covers company matches for environmental sustainability consulting firms associated with Philadelphia, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 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 RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built

45Companies

304Contacts tracked

80Verified emails

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The 21 largest environmental sustainability consulting firms based in Philadelphia, United States

Ranked by team size

Top 21 of 45 company matches for environmental sustainability consulting firms based in Philadelphia, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	IEI Group, LTD	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	11-50	33 contacts →
	Exact match “IEI is a nationally recognized, award-winning, 20-person architecture, interior design and facilities planning firm based in Northern Liberties for last 20 years.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Chplanning, LTD	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	11-50	21 contacts →
	Exact match “CHPlanning, Ltd is a forward-thinking firm of innovators and problem solvers.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	RE Vision Architecture	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	11-50	19 contacts →
	Exact match “Re:Vision is a deep green architecture and sustainability consulting practice dedicated to the design of high-performance buildings and sustainable communities.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	SMP Architects	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	11-50	15 contacts →
	Exact match “Attention to environmental concerns and historic, cultural, and architectural contexts are the hallmarks of our firm.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Plant Group	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	14 contacts →
	Exact match “PLANT Group (People Learning About Nature Together) is an ecological design and engineering firm connecting humans and nature to enable climate adaptation and mitigation work.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Repsg, INC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	11-50	13 contacts →
	Exact match “REPSG is a full-service environmental consulting and contracting firm dedicated to understanding each customer’s endpoint, plotting the best route forward, and achieving that goal.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Ideal Energy Solutions LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	11-50	10 contacts →
	Exact match “At Ideal Energy Solutions, our mission is to create the most reputable, full-range, and client-focused energy consulting firm in the industry.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Impact Recycling Partners	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	51-200	7 contacts →
	Exact match “Our mission is to inspire organizations to break the status quo when it comes to their waste and recycling programs.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Viridian Landscape Studio	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	5 contacts →
	Exact match “Viridian Landscape Studio is dedicated to the careful design and development of landscape architectural and ecological planning projects.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Inch And Meter, PC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	5 contacts →
	Exact match “Inch and Meter, PC is an environmental consulting and engineering firm with offices in Philadelphia and New York City.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Viva Environmental, Health, & Safety, LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	4 contacts →
	Exact match “We provide our clients with the most innovative solutions for any Environmental, Health, or Safety matter.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Energetek	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	4 contacts →
	Exact match “Energetek is an energy brokerage and consulting firm that takes a managed, data-driven approach to commodity purchasing.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Boyer Sudduth Environmental Consultants, LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	4 contacts →
	Exact match “At Boyer Sudduth Environmental Consultants, we believe schools and businesses can best achieve their sustainability goals when operations, institutional behavior, curriculum &…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Blue Hill Partners	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	3 contacts →
	Exact match “Blue Hill Partners is a boutique management consulting company supporting small businesses in the sustainability and impact sector.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	BLOOM	Exact match	Philadelphia, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “With Bloom, stay focused and aligned with social responsibility strategies that support employee passions, drive ESG priorities, and maximize community impact.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Home Science, LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “Home Science, LLC provides design and assessment services in the green building and home energy fields.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Elliott Energy	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “Elliott Energy is an energy consulting firm focusing mainly on energy audits, building modeling, benchmarking, and project management.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Rooted By Design LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “From brief consultation services through full service design, I guide clients through a streamlined design process, founded in eco-friendly practices.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Ease Sustainability Group	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “We are a collective of energy engineers and consultants who want to accelerate the energy transition and solve the biggest sustainability challenges facing us today.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Mt. Airy Environmental Services, LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “Mt.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Sustainable SIX Sigma	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “Sustainable Six Sigma (S3) offers a different approach, creating holistic, sustainable solutions to your critical issues and opportunities.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “environmental sustainability consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 21 of 45 environmental sustainability consulting firms based in Philadelphia, United States

See the full list, filter by size, metro and specialty, and access 80 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental sustainability consulting firms based in Philadelphia, United States at a glance

As of Sep 21, 2026

26.3%Verified-email coverage

6.8Average contacts per company

1-10Median size (employees)

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Philadelphia, so it is reported there. Company counts and contact totals on this page are exact for Philadelphia, over 45 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Philadelphia, United States whose business descriptions match “environmental sustainability consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 80 professional contacts with verified work emails across the full matched dataset. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Environmental sustainability consulting firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “environmental sustainability consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental sustainability consulting firms are there based in Philadelphia, United States?

RevenueBase identified 45 company matches for environmental sustainability consulting firms associated with Philadelphia, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

IEI Group, LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most environmental sustainability consulting firms?

New York leads the United States with 237 company records, followed by Houston (131) and Los Angeles (101). Philadelphia has 45.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 80 professional contacts with verified work emails tracked across these 45 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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.