Company lists · Data refreshed September 2026
Top 25 Taxonomy and classification consulting firms worldwide
RevenueBase identified 864 taxonomy and classification consulting firms worldwide as of September 2026 and tracks 8,221 professional contacts across them, including 2,895 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers taxonomy and classification consulting 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 29, 2026. Country and city lists for taxonomy and classification consulting 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 taxonomy and classification consulting firms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 479 contacts → | ||||
Partial evidence “Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 408 contacts → | ||||
Partial evidence “WEST provides environmental and statistical consulting services and contract research nationally and internationally to industry, government, and private organizations.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 189 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 133 contacts → | ||||
Indirect evidence “Thomson Environmental Consultants are experts in environmental compliance with offices in Guildford, Leeds, Cardiff, Birmingham and Manchester.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 121 contacts → | ||||
Indirect evidence “A Empresa Bicho do Mato Meio Ambiente Ltda.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 117 contacts → | ||||
Indirect evidence “Teia is dienstbaar aan uw ecologisch adviesbureau!” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 107 contacts → | ||||
Indirect evidence “Depuis plus de 45 ans, le Groupe Conseil UDA Inc.(UDA) accompagne, encadre et soutient ses clients dans leurs projets en environnement, en agriculture et en foresterie grâce à…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 104 contacts → | ||||
Partial evidence “Established in 1983, TechLaw provides environmental and management consulting services to the public sector nationwide.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 98 contacts → | ||||
Indirect evidence “For more than 15 years, we operated as Sartori Environmental Inc, establishing an exceptional reputation for our reliable, responsible, and innovative approach.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 93 contacts → | ||||
Indirect evidence “A Campo Análises é uma empresa nipo-brasileira com 45 anos de história intimamente relacionada ao desenvolvimento do Cerrado brasileiro.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 88 contacts → | ||||
Indirect evidence “Fondée en 1998, Naturalia Environnement s’impose aujourd’hui comme un acteur reconnu en matière d’expertises naturalistes et d’études réglementaires portant sur la biodiversité.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 87 contacts → | ||||
Indirect evidence “Gaia Ecologie, uw toegewijde ecologisch adviesbureau, is gespecialiseerd in hoogwaardig grootschalig ecologisch onderzoek en uitgebreide rapportage.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 81 contacts → | ||||
Partial evidence “Techknowgreen Solutions Limited is a leading environmental consulting firm in India with 24+ years of expertise in regulatory compliance, cutting-edge technology, and IT solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 78 contacts → | ||||
Partial evidence “Cramer Fish Sciences (CFS) is an employee owned fisheries research consulting firm with offices in Oregon, California, Idaho and Washington.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 69 contacts → | ||||
Indirect evidence “Since 1970, the highly-trained ecologists and professionals at H.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 65 contacts → | ||||
Partial evidence “SummitWest is an environmental consulting company that is home to a team of dynamic, solution-oriented thinkers.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 64 contacts → | ||||
Indirect evidence “Calidris est un bureau d’études spécialisé dans le domaine de l’écologie.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 62 contacts → | ||||
Indirect evidence “Spécialisé dans l’expertise de la faune, de la flore et des milieux naturels, le bureau d’études ALTIFAUNE a développé une expérience technique et scientifique au service de…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 60 contacts → | ||||
Partial evidence “RESCOM Environmental Corp (RESCOM) is a national environmental consulting firm, providing environmental, biological and cultural resource assessment services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 59 contacts → | ||||
Partial evidence “Founded in 2011, Sequoia is a California-based, woman-owned, small, and disadvantaged business (WBE | SBE | DBE) that provides environmental consulting services to public agencies…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 56 contacts → | ||||
Partial evidence “Skeo Solutions is a small business providing environmental consulting services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 56 contacts → | ||||
Indirect evidence “We are an Irish owned and operated environmental consultancy and testing facility.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 55 contacts → | ||||
Indirect evidence “Brookside Laboratories Inc.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 53 contacts → | ||||
Indirect evidence “ECO-MED est un bureau d'études, d'expertise et de conseil en environnement naturel spécifiques à l’aménagement du territoire et à la mise en valeur des milieux naturels.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 53 contacts → | ||||
Indirect evidence “Aquascop est un bureau d´études indépendant spécialisé dans l´étude des milieux aquatiques, implantés sur 5 agences en France métropolitaine (Angers, Montpellier, Toulouse, Nancy…” 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: taxonomy and classification consulting 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 taxonomy and classification consulting firms.
- Partial evidence
- Its own public description names part of taxonomy and classification consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name taxonomy and classification consulting 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 864 taxonomy and classification consulting firms worldwide
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Taxonomy and classification consulting firms worldwide at a glance
As of Sep 29, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 taxonomy and classification consulting 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
- Every country. Country and city lists for taxonomy and classification consulting firms are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “taxonomy and classification consulting 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 taxonomy and classification consulting 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 taxonomy and classification consulting 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, 2,895 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.
Taxonomy and classification consulting firms by location
5 lists · largest firstEvery Taxonomy and classification consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Taxonomy and classification consulting firms based in the United States194
- Taxonomy and classification consulting firms based in Brazil133
- Taxonomy and classification consulting firms based in France59
- Taxonomy and classification consulting firms based in Australia50
- Taxonomy and classification consulting firms based in Canada47
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 taxonomy and classification consulting 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 taxonomy and classification consulting firms are there worldwide?
RevenueBase identified 864 taxonomy and classification consulting 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?
Rincon Consultants, headquartered in Ventura, tops this list with the largest team on record.
Which country has the most taxonomy and classification consulting firms?
The United States leads with 194 companies, followed by Brazil (133) and France (59). Every taxonomy and classification consulting firms list by country and city is linked on this page.
Which city has the most taxonomy and classification consulting firms?
Sao Paulo leads with 10 headquartered companies, followed by Santiago (7) and Belo Horizonte (6).
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 2,895 verified decision-maker contacts tracked across these 864 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.