What Adessium Foundation does

Adessium Foundation is an independent Dutch philanthropic fund (Stichting Adessium) established in 2005 by Gerard van Vliet after the 2002 sale of his asset management company. Operating from Reeuwijk in the Netherlands without religious or political affiliations, the foundation provides financial support, strategic advice, and access to its professional network to roughly 95 civil society organizations in the Netherlands and Europe. Activities are organized into three program areas: Informed Society (digital rights, transparency, and investigative journalism), Nature and Living Environment (biodiversity, marine protection, and pollution reduction), and Just and Equitable Society (poverty reduction, healthcare access, and support for vulnerable populations). 83% of donations are multi-year, 50% of grants are made within the Netherlands, and total donations reached €18.7 million in 2025, averaging above €16 million per year since inception.

The foundation does not develop, sell, or license products or services, generates no commercial revenue, and charges no prices. Its sole technology footprint is a WordPress-based website that uses Matomo open-source analytics with anonymized IPs and no fingerprinting. The organization holds ANBI (Algemeen Nut Beogende Instelling) status with the Dutch Tax Administration and is GDPR-compliant. Distribution of "product" takes the form of grantmaking through a proactive, invitation-only process: program managers identify organizations aligned with the strategy, invite applications, conduct due diligence, sign grant agreements, and provide ongoing monitoring.

Go-to-market is community-led: rather than accepting unsolicited proposals, the foundation approaches organizations that fit its strategic objectives. The team consists of approximately 15 board members, management, and program managers/staff, including a Chairman (son of the founder), a Managing Director, a Director of Programs, and dedicated program managers for each of the three focus areas. Funding comes from a family endowment, with no external investors or parent company.

Name

Adessium Foundation

Legal name

Stichting Adessium

Website

https://adessium.org

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Philanthropic Foundation and Grantmaking

NAICS

Grantmaking Foundations (813211)

akta.pro primary industry

Community Foundations (BPAGAKAB)

akta.pro secondary industries

Environmental & Climate Grantmaking Foundations (BPAGAKAM), International Grantmaking & Development Foundations (BPAGAKAH)

Keywords

• Strategic philanthropy funding
• Grantmaking foundation services
• Civil society funding
• Nonprofit foundation giving
• Charitable donations programs

Headquarters

HQ city

Reeuwijk

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Others

Revenue model

1. Philanthropic Grantmaking: Adessium Foundation generates no commercial revenue. It is a philanthropic fund established in 2005 by founder Gerard van Vliet who sold his asset management company and donated a significant portion of proceeds to charitable causes. The foundation provides financial support, advice, and access to its network to civil society organizations in the Netherlands and Europe.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Adessium Foundation is an independent philanthropic fund that provides financial donations, strategic advice, and access to its professional network to civil society organizations in the Netherlands and Europe. It operates three program areas — Informed Society, Nature and Living Environment, and Just and Equitable Society — distributing approximately €18.7 million annually across 95 organizations, with 83% provided as multi-year flexible support.

Product overview

Adessium Foundation is an independent philanthropic fund established in 2005 that supports civil society organizations in the Netherlands and Europe. Rather than offering a product or technology platform, the foundation provides financial support, strategic advice, and access to its network to organizations aligned with three main program areas: Informed Society (focused on information accessibility and digital rights), Nature and Living Environment (focused on biodiversity, marine protection, and reducing pollution), and Just and Equitable Society (focused on livelihood security and support for vulnerable populations). The foundation does not develop or sell products but acts as a grant-maker supporting approximately 95 organizations annually with approximately €18.7 million in donations.

Differentiator

Problem solved

Functional benefit

Products and services

• Informed Society Program Strategic grantmaking and support program funding civil society organizations in the Netherlands and Europe that work on an open, informed society where information is accessible to everyone, digital rights are protected, investigative journalism is supported, and government transparency is advanced.
• Nature and Living Environment Program Strategic grantmaking and support program funding organizations working on biodiversity protection, nature restoration, marine conservation, pollution reduction (especially chemical pollution), sustainable fishing, and climate adaptation in European waters and policy venues.
• Just and Equitable Society Program Strategic grantmaking and support program funding organizations working on poverty reduction, livelihood security, housing, healthcare access, youth support, democratic participation, and inclusion of vulnerable populations including undocumented individuals and children in migration contexts.

Quantifiable outcome

• €18.7 million donated to 95 organizations in 2025
• +3 more outcomes

Named customers24 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

23 partnerships are on record, tiered core and minor.

• Bits of FreedomcoreOthersDigital rights organization working toward an open and just information society through advocacy, campaigns, and legal action in the Netherlands and Brussels.
• CHEM TrustcoreOthersWorks to prevent synthetic chemicals from causing long-term harm to animals and people by campaigning for restrictions on hazardous chemicals and safer alternatives.
• Global Fishing WatchcoreOthersPromotes ocean management through transparency about human activities at sea using advanced technology to make global fishing activity visible.
• Med Sea AlliancecoreOthersAlliance of nearly 20 organizations dedicated to restoring the Mediterranean Sea by driving policy change to protect critical marine habitats and end illegal fishing.
• European Environmental Bureau (EEB)coreOthersEurope's largest network of environmental citizens' organisations representing some 30 million individual members and supporters.
• EDRicoreOthersMission to promote, protect and uphold civil and human rights in the digital age across Europe.
• Stichting PILPcoreOthersLegal ally for diverse stakeholders including NGOs, advocacy groups, movements, communities, activists, lawyers and academics in the Netherlands.
• Marilles FoundationcoreOthersCommitted to preserving the Balearic Sea and its coastline with vision that healthy marine ecosystems can go hand in hand with economic prosperity.
• ClientEarthcoreOthersUses the power of law to bring about systemic change that protects the earth, working in partnership across borders, systems and sectors in over 60 countries.
• InvesticocoreOthersNon-profit organization for investigative journalism and trainer of journalistic talent, exposing societal injustices through deep investigative reporting.
• Investigate EuropecoreOthersCross-border team of reporters, editors and producers delivering in-depth investigative journalism from a changing Europe.
• Food Packaging ForumminorOthersHelps stakeholders make informed decisions about food packaging through latest science on chemicals in food contact materials and environmental impacts.
• Open State FoundationcoreOthersAdvances digital transparency in government to strengthen verifiable and vibrant democracy by unlocking information from public institutions as open data.
• ONSbankcoreOthersNon-profit organization striving for a humane approach to people who struggle with debt, using art, music, sports and theater in their 6-month program.
• SOMOcoreOthersCentre for Research on Multinational Corporations investigating impacts and enablers of unjustified corporate power since 1973.
• Bureau BurgerberaadcoreOthersStrengthens democracy by stimulating citizen councils with social and political impact through randomly selected groups of 100-150 residents.
• Leger des HeilscoreOthersOne of the largest care and welfare organizations in the Netherlands, fighting loneliness and providing professional care services.
• CivitatescoreOthersEuropean Democracy Fund supporting independent public interest media and civil society organisations addressing polarization and shrinking civil society space.
• IMC WeekendschoolcoreOthersPrepares young people for choices about their future based on their own talents and interests through 'Expedition to the Future' education concept.
• ASKVcoreOthersFights for structural improvement of position of undocumented individuals, standing for future perspective for every person.
• Natuur & MilieucoreOthersOrganization working on stopping climate change and restoring nature through changes in government policy, business, and people's behavior.
• MedReActcoreOthersTakes action to protect the Mediterranean Sea from the impacts of fishing by working directly with local communities, scientists, activists, and divers.
• Defence for ChildrencoreOthersProtects and promotes children's rights for 40 years nationally and internationally, focusing on migration, youth care and child abuse.

Scale indicators6 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Oak Foundation: International family foundation supporting civil society on environment, social justice, and human rights. Comparable in mission scope, multi-year flexible funding approach, and proactive grantee identification across similar thematic areas to Adessium.
• European Climate Foundation: Europe-focused climate philanthropy that funds advocacy, research, and NGO grantees to advance climate goals. Directly comparable to Adessium's Nature and Living Environment program area in funding civil society to drive systemic environmental change.
• King Baudouin Foundation: Large Belgium-based public benefit foundation operating across European civil society. Comparable in that it makes strategic grants to NGOs and civil society actors across multiple thematic areas with an invitation-based process and emphasis on long-term impact.
• Stichting DOEN: Dutch independent foundation supporting innovative entrepreneurs, artists, and civil society organizations. Most directly comparable as a similarly-sized, Netherlands-based grantmaker with comparable thematic areas spanning sustainable society and creative innovation.
• Democracy Fund: US-based foundation working to ensure equitable public participation in democratic processes, with focus areas overlapping Adessium's Informed Society program on media, election integrity, and government transparency.
• Arcadia Fund: European-based family foundation funding environmental conservation, cultural heritage, and open knowledge initiatives. Comparable as a private family foundation with multi-decade horizons, a proactive grantmaking approach, and overlapping themes with Adessium's nature and informed-society programs.
• Nia Tero: Global philanthropic fund supporting Indigenous-led marine conservation and land stewardship. Directly comparable to Adessium's marine-focused grantees (Global Fishing Watch, Med Sea Alliance, Marilles Foundation) but with a narrower thematic focus on Indigenous leadership.
• Luminate: Global philanthropic organization funding independent media, civic engagement, and digital rights. Directly comparable to Adessium's Informed Society program area on digital rights, journalism, and democratic accountability.

Broad incumbents

• Open Society Foundations: One of the largest private foundations globally, funding civil society on human rights, governance, and accountability. Comparable in mission focus on democratic and informed societies but at much larger scale and broader geographic reach than Adessium.

Regional players

• Heinrich Böll Foundation: Germany-based political foundation affiliated with the German Green Party, funding civil society, democracy, and environment initiatives. Comparable in European civil society grantmaking focus but politically affiliated, unlike Adessium's independent model.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/adessium
• LinkedInlinkedin.com/company/adessium-foundation

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Adessium Foundation