What EFdeN does

EFdeN (legal entity: Asociația Solar Decatlon București) is a Romanian non-governmental, non-profit organization founded in 2013, dedicated to sustainability education and Romania's energy transition. The organization operates a portfolio of interconnected programs spanning physical infrastructure, digital tools, and educational programs. Its flagship physical asset is the 4000 m² EFdeN Sustainable City campus in Bucharest, which includes 8 themed zones and over 30 points of interest featuring solar homes, photovoltaic trees, urban agriculture, and electric mobility solutions. The digital offering centers on the Energy Efficiency Simulator (simulator.efden.org), co-developed with ING România, which provides Romanian homeowners and renters with instant energy-class estimates, consumption-reduction recommendations, and savings calculations. The mobile HaiHui Verzui laboratory — a converted semi-trailer equipped with microscopes and interactive technology — extends hands-on STEM and sustainability education to underserved and rural communities across Romania.

EFdeN's product surface also includes SustenAbilitate 2.0, the first optional applied sustainability course for Romanian high school students (pioneered at Colegiul Național Gheorghe Lazăr and expanded via Train-the-Trainer programs across seven counties); the European Institute for Sustainability (EIS), the first Romanian institute dedicated to training future sustainability leaders; the energiaTa initiative, which has shaped Romanian prosumer and energy-community legislation; and the rCharge solar bicycle-charging network. The organization has participated in the Solar Decathlon international competition in Versailles, Dubai, and Wuppertal, producing award-winning solar and passive-house prototypes.

The business model is non-commercial: all core programs (public tours, SustenAbilitate 2.0, HaiHui Verzui, the Simulator) are delivered free to end users. Revenue is sourced from individual donations (PayPal, bank transfers, 3.5% income-tax redirection), corporate sponsorships (tax-deductible under Romanian law), and institutional grants including the EU-funded PilotInCities project. Operational capacity rests on 800+ student, graduate, and professional volunteers who have contributed 350,000+ hours across 10 organizational departments. Strategic partnerships span founding universities (UTCB, UAUIM), additional academic partners (UPB, SNSPA, UNARTE), major Romanian banks (ING România, BCR, Raiffeisen), energy and infrastructure companies (ENGIE, NEPI Rockcastle, Romcim, Darcom Energy), media (ProTV), and EU institutions (DG CLIMA).

Name

EFdeN

Legal name

Asociația Solar Decatlon București

Website

https://efden.org

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

11–50 employees

Short description

EFdeN is a Romanian non-profit founded in 2013 that delivers sustainability education through a 4000 m² public campus, a free Energy Efficiency Simulator, mobile STEM labs for rural communities, school programs, and policy advocacy on prosumer legislation.

Ownership category

akta.pro rank

Product category

Sustainability Education Services

NAICS

Educational Support Services (611710), Educational Services (611), Social Advocacy Organizations (8133)

SIC

Services-Educational Services (8200), Services-Social Services (8300)

akta.pro primary industry

Education Access & EdTech for Equity (Low-cost Learning, Skills Platforms) (BPAGALAH)

akta.pro secondary industries

Environmental Conservation & Sustainability Volunteering (EDAIAGAB), International Development & Donor-Funded Education Programs (EDADALAB)

Keywords

• Sustainability education
• Energy efficiency tools
• Mobile STEM laboratory
• Sustainable city campus
• Renewable energy advocacy

Headquarters

HQ city

Bucharest

HQ country

Romania

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Individual Donations: EFdeN accepts online donations (PayPal) and bank transfers (RON and EUR) from individuals who wish to support sustainability education and youth development in Romania. The organization also encourages taxpayers to redirect 3.5% of their income tax to EFdeN.
2. Corporate Sponsorships: Companies sponsor EFdeN through direct financial contributions or in-kind support. Sponsorships are tax-deductible under Romanian law for companies paying corporate income tax (up to 20% of tax due, max 7.5‰ of turnover) and for PFA/self-employed (up to 5% of net income). Sponsors receive recognition, access to the campus, and association with sustainability education.
3. Institutional Grants and Project Funding: EFdeN participates in European-funded projects such as PilotInCities and receives institutional support from founding universities (UTCB, UAUIM) and partners like the European Commission DG CLIMA. Funding supports specific infrastructure and program delivery.

Go-to-market motion3 records

Distribution channels5 records

Marketing channels8 records

Core offering

EFdeN is a Romanian non-governmental organization that delivers sustainability education through an integrated ecosystem of programs: a 4,000 m² public Sustainable City campus in Bucharest featuring solar homes, photovoltaic trees, urban agriculture, and electric mobility; a free national Energy Efficiency Simulator (simulator.efden.org) for homeowners; the HaiHui Verzui mobile STEM laboratory reaching underserved communities; the SustenAbilitate 2.0 high school applied sustainability course; the European Institute for Sustainability leadership training; and the energiaTa initiative that has influenced Romanian prosumer legislation. The organization mobilizes more than 800 student volunteers and has accumulated over 350,000 volunteer hours since its founding in 2013.

Product overview

EFdeN is a Romanian educational NGO focused on sustainability that operates a portfolio of interconnected products and programs. The core offerings include the Energy Efficiency Simulator (simulator.efden.org) for energy class estimation, the EFdeN Sustainable City campus for public education on sustainable urban living, and the HaiHui Verzui mobile laboratory bringing hands-on STEM education to underserved communities. These are complemented by formal educational programs (European Institute for Sustainability, Sustenabilitate 2.0 course), the energiaTa prosumager initiative influencing national legislation, and Solar Decathlon competition projects. The organization functions as a unified sustainability education platform rather than a traditional software company, with products designed to serve students, communities, and professionals across the energy transition ecosystem.

Differentiator

Problem solved

Functional benefit

Brands

• European Institute for Sustainability (EIS): First institute in Romania dedicated to training future leaders in sustainability.
• SustenAbilitate 2.0
• HaiHui Verzui
• energiaTa
• EFdeN Sustainable City
• rCharge
• Simulatorul de Eficiență Energetică

Products and services

• Simulatorul de Eficiență Energetică (Energy Efficiency Simulator) Free interactive web tool that allows Romanian homeowners and renters to answer questions about their apartment or home and instantly receive an energy class estimate, concrete recommendations for reducing consumption, and potential savings calculations.
• EFdeN Sustainable City Campus 4,000 m² public campus in Bucharest showcasing sustainable urban solutions including solar homes, photovoltaic trees, urban agriculture, and electric mobility options, organized into 8 themed zones with over 30 points of interest. Offers guided tours and hosts workshops and events.
• HaiHui Verzui – Caravana Sustenabilității Mobile sustainability laboratory converted from a semi-trailer, equipped with laboratory equipment, microscopes, experimental kits, and interactive technology. Organizes practical workshops on climate change, water quality testing, recycling, and renewable energy for schools without laboratories and isolated communities across Romania.
• SustenAbilitate 2.0 Optional applied sustainability course for high school students, inspired by the 17 UN Sustainable Development Goals. Provides interactive project-based learning methodology and practical tools for teachers to implement sustainability education, with Train-the-Trainer sessions for educators.
• European Institute for Sustainability (EIS) Educational institute training future leaders in sustainability through specialized programs and professional development in climate and social challenges.
• energiaTa

Quantifiable outcome

• The microgrid prototype aggregates production and storage data to keep energy within the community, reducing consumer costs by eliminating large-scale transmission losses and removing infrastructure charges for locally-produced energy.
• +3 more outcomes

Named customers2 records

Segments5 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

45 partnerships are on record, tiered founding, key, supporting, flagship and pilot.

• Universitatea de Arhitectură și Urbanism „Ion Mincu" (UAUIM)foundingStrategic or Co-development PartnerUAUIM is a founding university partner of EFdeN, providing academic support and student involvement in sustainability projects from the organization's inception in 2013.
• Universitatea Tehnică de Construcții București (UTCB)foundingStrategic or Co-development PartnerUTCB is a founding university partner of EFdeN, providing engineering expertise and student involvement from the organization's inception in 2013. UTCB's Center for Research Management, led by Ancuța Neagu, invited EFdeN to present the microgrid prototype at the PilotInCities project conference.
• ING RomâniakeyStrategic or Co-development PartnerING România co-developed the Energy Efficiency Simulator (simulator.efden.org), a free online tool that helps Romanian residents estimate their energy class, receive consumption reduction recommendations, and calculate potential savings. ING's branding appears on the Simulator platform.
• Uniunea Politehnică București (UPB)supportingStrategic or Co-development PartnerUPB is a partner university collaborating with EFdeN on student involvement and academic projects in sustainability.
• SNSPAsupportingStrategic or Co-development PartnerSNSPA is a partner university contributing to EFdeN's interdisciplinary approach to sustainability education.
• UNARTEsupportingStrategic or Co-development PartnerUNARTE (National University of Arts) is a partner university contributing design and creative expertise to EFdeN's projects.
• European Commission (DG CLIMA)flagshipStrategic or Co-development PartnerA delegation from DG CLIMA (Directorate-General for Climate Action) and the European Commission Representation in Romania visited EFdeN's campus, including Jan Dusík (Deputy Director-General, DG CLIMA). The visit included a tour of the sustainable city prototype and a presentation of the Energy Efficiency Simulator, highlighting the organization's role in Romania's energy transition.
• Comisia Europeană — Reprezentanța în RomâniaflagshipStrategic or Co-development PartnerPart of the EU delegation that visited EFdeN's campus, represented by Oana Niculescu (Political Reporter), alongside DG CLIMA officials.
• BCR (Banca Comercială Română)keyStrategic or Co-development PartnerBCR is a partner of the EFdeN Sustainable City project, listed among the initiative's official partners.
• ENGIE RomâniakeyStrategic or Co-development PartnerENGIE România is listed as a strategic partnership supporting EFdeN's sustainability initiatives in Romania.
• Raiffeisen Bank RomâniakeyStrategic or Co-development PartnerRaiffeisen Bank is a strategic partner of EFdeN, contributing to the organization's sustainability and education programs.
• NEPI RockcastlekeyStrategic or Co-development PartnerNEPI Rockcastle is a strategic partner and supporter of the HaiHui Verzui mobile laboratory and EFdeN's community education programs.
• ProTV RomâniakeyGTM or Marketing PartnerProTV is a media and strategic partner supporting the SustenAbilitate 2.0 program, helping make the sustainability curriculum for high school students widely accessible.
• Daimler Truck & Bus RomâniasupportingStrategic or Co-development PartnerDaimler Truck & Bus România supports EFdeN's programs, including the HaiHui Verzui mobile laboratory initiative.
• Darcom EnergysupportingTechnology or IntegrationDarcom Energy is a technology partner in EFdeN's strategic partnerships, contributing energy sector expertise.
• PENNY RomâniasupportingStrategic or Co-development PartnerPENNY is a strategic partner supporting EFdeN's community and education initiatives.
• Mercedes-Benz (logistics support for HaiHui Verzui)supportingOthersMercedes-Benz provides logistical support for the HaiHui Verzui mobile laboratory, enabling the semi-trailer conversion and transportation of the mobile educational lab.
• Blue RiversupportingStrategic or Co-development PartnerBlue River provides logistical support for the HaiHui Verzui mobile laboratory, alongside NEPI Rockcastle, Romcim, Daimler Truck & Bus România, and Mercedes-Benz.
• Romcim (CRH Company)supportingStrategic or Co-development PartnerRomcim, part of the CRH Group, supports the HaiHui Verzui mobile laboratory program as a community partner.
• PilotInCities (EU Research Project Consortium)flagshipStrategic or Co-development PartnerEFdeN participates in the EU-funded PilotInCities project as a consortium member. Within this framework, EFdeN's Victor presented the microgrid prototype at the project's final conference in Sinaia. The microgrid demonstrates how communities can manage locally-produced energy through data aggregation, storage, and intelligent distribution.
• WorldSkills România and Skills AustriasupportingStrategic or Co-development PartnerEFdeN, represented by Ioana Prodan, participates in WorldSkills Austria's job shadowing program to explore how the Concrete Construction competition can be brought to Romania, exchanging best practices in vocational education between Romania and Austria.
• Energy Strategy Summit / energynomicssupportingGTM or Marketing PartnerEFdeN's energy expert Victor presented at Energy Strategy Summit 2026 organized by energynomics, contributing to a panel on 'Energy for Industry, Buildings & Distributed Energy Infrastructure' and raising awareness of the microgrid and energy efficiency challenges in Romania.
• Ziarul Financiar (Roxana Petrescu, Senior Energy Editor)supportingGTM or Marketing PartnerDalia Stoian (EFdeN President) was interviewed by Roxana Petrescu of Ziarul Financiar for a television program about Romanian businesses, with a focus on buildings and the energy transition.
• BAUAkademie WiensupportingStrategic or Co-development PartnerBAUAkademie Wien runs programs where students develop skills through hands-on activities and direct industry contact. EFdeN uses BAUAkademie as a model and benchmark for how vocational education and professional competitions can be integrated in Romania.
• Colegiul Național Gheorghe LazărpilotStrategic or Co-development PartnerThe pilot school for SustenAbilitate 2.0, the first optional applied sustainability course for high school students in Romania. Launched in 2024, the course introduces the 17 UN Sustainable Development Goals through interactive, project-based learning.
• ANFP (Agenția Națională a Funcționarilor Publici)supportingOthersListed as an institutional partner of EFdeN alongside the European Commission.
• SignifysupportingTechnology or IntegrationSignify (formerly Philips Lighting) is a partner for the EFdeN Sustainable City project, providing lighting technology solutions for the campus.
• BuildWindsupportingTechnology or IntegrationBuildWind is an educational partner listed on the EFdeN Sustainable City page, providing expertise relevant to sustainable building and wind energy integration.
• BokashisupportingTechnology or IntegrationBokashi is a partner contributing to the EFdeN Sustainable City project, likely in the area of organic waste management or circular economy solutions.
• Charger (electric mobility)supportingTechnology or IntegrationCharger provides electric mobility infrastructure for the EFdeN Sustainable City campus, supporting the e-mobility zone of the prototype.
• Cuibul ArtiștilorsupportingStrategic or Co-development PartnerAn educational partner of the EFdeN Sustainable City project, contributing to cultural and creative programming at the campus.
• GalatecasupportingStrategic or Co-development PartnerAn educational partner of the EFdeN Sustainable City project, contributing to the cultural and educational programming at the campus.
• TARA InteractivesupportingTechnology or IntegrationTARA Interactive is the web development agency that created the EFdeN website (noted as the creator of efden.org, 2013-2026). Also listed as a partner on the EFdeN Sustainable City page.
• GEYC (Global Youth Emotional Intelligence Community)supportingStrategic or Co-development PartnerListed as a partner on the EFdeN Sustainable City page, contributing to youth engagement and emotional intelligence aspects of the sustainability education programs.
• FrendssupportingStrategic or Co-development PartnerListed as an educational partner of the EFdeN Sustainable City project.
• nhoodsupportingStrategic or Co-development Partnernhood is an educational partner of EFdeN, supporting programs related to urban regeneration and community development.
• CeetrussupportingStrategic or Co-development PartnerCeetrus is an educational partner supporting EFdeN's sustainability and urban development programs.
• TREND ConsultsupportingStrategic or Co-development PartnerTREND Consult is an educational partner contributing expertise to EFdeN's programs.
• BISM (București Impact pentru Studenți și Masteranzi)supportingStrategic or Co-development PartnerBISM is an educational partner of EFdeN, supporting student and master's level engagement.
• Hacking WorksupportingStrategic or Co-development PartnerHacking Work is an educational partner of EFdeN, contributing to programs related to skills and workforce development.
• AutonomsupportingStrategic or Co-development PartnerAutonom is an educational partner supporting EFdeN's mobility and sustainability programs.
• ReviconsupportingStrategic or Co-development PartnerRevicon is listed as a partner for comfort and innovation, supporting EFdeN's sustainable city initiatives.
• KFEA (Asociația Română pentru Echipamente de Gătit și Frigidere)supportingStrategic or Co-development PartnerKFEA is a partner for comfort and innovation, supporting EFdeN's sustainable city projects.
• KronesupportingStrategic or Co-development PartnerKrone is a partner for comfort and innovation, listed on the EFdeN partners page.
• Profesorii Trăsniți (Fun Science Shows)supportingStrategic or Co-development PartnerProfesorii Trăsniți delivers fun science shows as part of the HaiHui Verzui mobile laboratory program, providing interactive demonstrations that bring invisible scientific phenomena to life for children.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Romania Green Building Council (RoGBC): Romanian sustainability membership organization focused on green building standards. Comparable to EFdeN in driving sustainability policy, education, and corporate engagement in the built environment.
• Habitat for Humanity Romania: Romanian housing-focused NGO with hands-on construction programs and volunteer mobilization. Comparable to EFdeN in combining sustainable building expertise, volunteer-driven construction, and corporate sponsorship models.
• Code for Romania: Romanian civic technology NGO building digital tools for social impact. Comparable to EFdeN as a nonprofit combining digital platforms (like EFdeN's Simulator) with volunteer-driven programming and corporate partnerships.
• Greenpeace Romania: Environmental advocacy NGO operating in Romania. Comparable to EFdeN as a nonprofit pushing sustainability policy and public campaigns, with similar reliance on donations and media attention.
• Impact Hub Bucharest: Social enterprise and impact organization hub in Romania. Comparable to EFdeN as a Romanian nonprofit/impact organization supporting sustainability-focused entrepreneurship and education.
• ECOTIC: Romanian environmental NGO operating producer responsibility programs. Comparable to EFdeN as a Romanian nonprofit with EU-aligned sustainability programs, corporate sponsorship, and education campaigns.
• Teach for Romania: Romanian education equity NGO recruiting talent to underserved communities. Comparable to EFdeN in driving national education innovation through volunteer pipelines, corporate funding, and outcome-focused programs.
• WWF Romania: Romanian environmental NGO that runs conservation and sustainability education programs. Comparable to EFdeN as a Romanian nonprofit focused on sustainability advocacy, public engagement, and corporate partnerships.
• Ashoka Romania: Branch of a global social entrepreneurship network active in Romania. Comparable to EFdeN in supporting changemakers through education, funding, and community building.

Broad incumbents

• Climate Reality Project Europe: Global climate education and advocacy organization with European presence. Comparable to EFdeN in mission (climate education, policy advocacy) but operates at much larger scale with broader regional reach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/efden_org
• Xx.com/efden
• LinkedInlinkedin.com/company/efden

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 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 EFdeN