Company lists · Data refreshed September 2026
Top 25 Rare disease organizations worldwide
RevenueBase identified 783 rare disease organizations worldwide as of September 2026 and tracks 19,341 professional contacts across them, including 9,489 with verified work emails. The United States is the largest market and Paris the largest hub.
This list covers rare disease organizations 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 21, 2026. Country and city lists for rare disease organizations 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 rare disease organizations worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 6,136 contacts → | ||||
Strong evidence “Alexion, AstraZeneca Rare Disease is focused on pioneering new possibilities for the rare disease community.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,556 contacts → | ||||
Indirect evidence “Leading with purpose.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,212 contacts → | ||||
Strong evidence “PTC is a patient-centered biopharmaceutical company focused on discovering, developing & commercializing medicine for children and adults living with rare and serious disease.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 976 contacts → | ||||
Strong evidence “Pharming Group is a global biopharmaceutical company dedicated to transforming the lives of patients with rare, debilitating, and life-threatening diseases.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 603 contacts → | ||||
Strong evidence “Agios is a commercial-stage biopharmaceutical company dedicated to redefining the future of rare disease treatment.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 582 contacts → | ||||
Strong evidence “PANTHERx Rare makes rare disease care more hyper-personalized and less overwhelming by focusing relentlessly on each patient and each therapy.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 571 contacts → | ||||
Partial evidence “L’AFM-Téléthon est une association de parents et de malades qui mène un combat sans relâche contre des maladies génétiques, rares et lourdement invalidantes.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 491 contacts → | ||||
Strong evidence “Our mission is to identify, develop and deliver life-changing therapies to people living with rare disease.#InRareForLife Community Guidelines…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 409 contacts → | ||||
Strong evidence “LifeArc® is a self-funded medical research organisation with one clear purpose – transforming the lives of people living with rare diseases and drug-resistant infections.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 257 contacts → | ||||
Strong evidence “TIGEM is a leading research institute dedicated to uncovering the molecular mechanisms of rare genetic diseases and translating these discoveries into innovative therapies, with a…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 217 contacts → | ||||
Partial evidence “Focused on complex therapies and orphan diseases, Varifarma is a company which is devoted to improving the patients' quality of life.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 196 contacts → | ||||
Indirect evidence “We’re committed to supporting patients and their caregivers in every way we can.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 185 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 168 contacts → | ||||
Strong evidence “Bionews is a digital health solutions company dedicated to empowering more than 50 rare disease communities with trusted information, news, and connections.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 156 contacts → | ||||
Strong evidence “The National Organization for Rare Disorders (NORD), a 501(c)(3) organization, is an independent patient advocacy organization dedicated to helping individuals with rare diseases…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 118 contacts → | ||||
Strong evidence “Transforming Rare Disease Treatment At Orphalan we identify, develop, and provide access to innovative treatments for patients with rare diseases to make a positive and meaningful…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 110 contacts → | ||||
Strong evidence “Ågrenska is a national centre of competence for rare diseases and other disabilities.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 84 contacts → | ||||
Partial evidence “We are a clinical-stage biopharmaceutical company focused on improving the lives of patients with genetically defined diseases in areas of high unmet medical need, with an initial…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 83 contacts → | ||||
Indirect evidence “Amryt Pharma was acquired by Chiesi Farmaceutici S.p.A.(“Chiesi”) April 12, 2023.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 81 contacts → | ||||
Strong evidence “The EveryLife Foundation for Rare Diseases is powered by the rare disease community to improve health outcomes by driving change through evidence-based policy, leading…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 78 contacts → | ||||
Indirect evidence “We are a purpose-driven, commercial-stage company with a late-stage pipeline committed to redefining what is possible in bringing life-changing therapies to people living with…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 75 contacts → | ||||
Strong evidence “EURORDIS-Rare Diseases Europe is a unique, non-profit alliance of over rare disease patient organisations from more than 70 countries that work together to improve the lives of…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 70 contacts → | ||||
Strong evidence “We are committed to transforming the lives of people affected by cancer or rare disease, globally.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 65 contacts → | ||||
Strong evidence “ITF Therapeutics is the US-based rare disease division of Italfarmaco S.p.A.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 63 contacts → | ||||
Partial evidence “This is a time of great hope for individuals with complex diseases such as NF1 and their families.” Source: RevenueBase Database · checked Sep 21, 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: rare disease organizations. 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 rare disease organizations.
- Partial evidence
- Its own public description names part of rare disease organizations, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name rare disease organizations. 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 783 rare disease organizations worldwide
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Rare disease organizations worldwide at a glance
As of Sep 21, 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 rare disease organizations, 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 rare disease organizations are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “rare disease organizations”. 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 rare disease organizations), 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 rare disease organizations, 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, 9,489 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 21, 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.
Rare disease organizations by location
4 lists · largest firstEvery Rare disease organizations list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 rare disease organizations, 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 rare disease organizations are there worldwide?
RevenueBase identified 783 rare disease organizations 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?
Alexion Pharmaceuticals, INC, headquartered in Boston, tops this list with the largest team on record.
Which country has the most rare disease organizations?
The United States leads with 223 companies, followed by France (72) and the United Kingdom (47). Every rare disease organizations list by country and city is linked on this page.
Which city has the most rare disease organizations?
Paris leads with 21 headquartered companies, followed by Cambridge (12) and London (12).
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 9,489 verified decision-maker contacts tracked across these 783 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 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 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.