MacArthur Foundation

100x Impact Accelerator is a venture accelerator that backs impact ventures capable of improving hundreds of millions of lives through systemic change. They provide catalytic capital, world-class expertise, and access to a community of mentors, advisors, and funders, all focused on deep systems-change support. Their ventures deliver impact across education, climate, healthcare, and other global challenges. 100x Impact operates with the mission to scale social innovations that can achieve systemic change, recognizing that while the world has many social innovations, very few scale effectively. They are powered by LSE (London School of Economics) and leverage evidence-based research, expert guidance, and global convening reach. Their approach combines funding with LSE's academic rigor and venture insights shared across the ecosystem to drive impact at scale. The organization has established itself as a significant player in the impact investing ecosystem by backing 35 ventures that have collectively impacted 144 million lives across 45 countries. They have demonstrated their effectiveness by helping ventures secure substantially more capital after completing their program, with participants raising 15 times more funding. Their focus on creating 'impact unicorns' and sharing proven insights globally positions them as a catalyst for scaling impactful solutions worldwide.

Access Ventures is an impact investing organization that uses catalytic capital and blended finance to expand economic opportunity and build stronger, more equitable communities. Its work is grounded in the belief that lasting transformation begins with people, not capital alone. Through a one-pocket mindset, Access Ventures seeks to align investments, grants, partnerships, and other resources with its mission. The organization accepts risks that conventional investors may avoid, supports emerging ideas and leaders, and develops financial structures designed to improve access and economic agency. Over the past decade, Access Ventures has invested in companies, funds, community initiatives, and leadership programs addressing challenges such as financial inclusion, accessibility, healthcare, small-business financing, and sustainable development. By combining capital with collaboration and long-term support, Access Ventures aims to demonstrate that financial discipline and measurable social impact can work together to create a more resilient and inclusive economy.

Accion is a global nonprofit dedicated to building a fair and inclusive economy by expanding access to responsible financial services. Founded in 1961, Accion works at the intersection of fintech, investment, and advisory to scale solutions that improve financial health for underserved populations. Through its investment strategies, advisory services, and research initiatives, Accion supports companies and financial institutions reaching millions of people across emerging markets. Its work spans digital banking, credit, payments, and climate-focused financial tools, helping individuals and small businesses gain access to the financial systems they need to grow and thrive.

Acumen is a venture philanthropy organization that invests in visionary entrepreneurs building transformational companies from seed to scale. They focus on funding bold entrepreneurs who are creating inclusive solutions across sectors like sustainable agriculture, quality education, renewable energy, healthy communities, dignified jobs, and gender equality. Their mission is to break the cycle of poverty through patient capital investments in high-innovation, high-impact enterprises. They operate by deploying philanthropic capital to shape markets and support entrepreneurs who are addressing the world's toughest poverty-related challenges, investing where traditional funders won't. Acumen Ventures has established itself as a significant force in the impact investing ecosystem since 2001, with an A to Z directory of portfolio companies spanning over two decades. They matter because they've reinvented the rules of return, prioritizing impact alongside financial sustainability and helping to demonstrate that venture philanthropy can drive meaningful systemic change in underserved communities globally.

The Adaptation Fund Climate Innovation Accelerator (AFCIA) is a programme of the Adaptation Fund, implemented by the World Food Programme (WFP) Innovation Accelerator in Munich. It identifies, supports and scales locally rooted climate-adaptation solutions that protect food systems and livelihoods in communities hit by droughts, floods, storms and rising temperatures. AFCIA runs four regional cohorts from 2024 to 2029. Each year focuses on a different region. The first cohort (2024) supported ventures implementing in Egypt, Jordan and Lebanon. The Asia-Pacific sprint (2026) includes ventures in Nepal, Pakistan and the Philippines. The third cohort targets Latin America and the Caribbean, with a live call for solutions tailored to climate-adaptation challenges in the Dominican Republic, El Salvador and Peru. The programme contributes to SDG 2 (Zero Hunger) and SDG 13 (Climate Action). It seeks both low- and high-tech innovations from established legal entities (for-profit, nonprofit, social business, NGO or INGO) that already have a presence in the country of implementation and are at least seed stage. Selected teams join a bootcamp, then can enter a nine-month Sprint with WFP support and equity-free funding. Applications for the LAC cohort close 13 September 2026, 23:59 UTC; only English submissions are accepted.

Africa Go Green Fund is a climate-focused investment initiative supporting renewable energy, energy efficiency, and low-carbon infrastructure projects across Africa. Established by KfW on behalf of the German government, the fund helps accelerate private sector investment into sustainable energy solutions that reduce greenhouse gas emissions and expand climate resilience throughout the continent. The fund provides debt financing, mezzanine capital, guarantees, and technical assistance to companies, financial institutions, and infrastructure projects advancing Africa’s clean energy transition.

Airbnb.org is an independent U.S. 501(c)(3) public charity that pays for free, short-term housing for people affected by disasters and other crises. The organization launched in 2020 after eight years of crisis-housing work through Airbnb's Open Homes program, which began when a host named Shell offered her home at no charge after Hurricane Sandy in 2012. Airbnb.org is legally separate from Airbnb, Inc.; Airbnb covers the charity's operating costs, supplies access to its technology platform and services, and says it does not earn money from Airbnb.org-supported stays. The operating model is housing assistance rather than conventional grantmaking. Airbnb.org works with vetted local nonprofit partners that identify and refer eligible people, volunteers, first responders, refugees, and families traveling for medical care. Airbnb.org then funds bookings on Airbnb's platform. Hosts are generally paid as they would be for an ordinary stay and receive AirCover and specialized support; some separately choose to discount a stay, offer it free, or donate a portion of their payout. An Airbnb.org emergency-stay host should therefore not be described as synonymous with Airbnb's broader commercial-host community. Airbnb.org organizes its work around emergency-response stays, medical stays, and resettlement stays. Its official site says more than 60,000 hosts have helped provide housing to more than 250,000 people since the 2012 origin of the program. It separately reports 1.6 million nights of free emergency housing since Airbnb.org launched in 2020. Those are facilitated stays and nights, not a count of unique guests, grants, or dollars deployed. For January through June 2026, Airbnb.org reported 87 disaster responses, more than 28,000 nights provided, and 5,776 hosts who donated. It also reported that an Airbnb.org booking cost an average of US$110 per night globally over the preceding five years. These organization-reported operating measures show delivery capacity, but they are not assets under management, audited grant expenditures, or a committed funding pool.

AirMiners is a leading platform advancing the carbon dioxide removal (CDR) industry through community, education, and early-stage venture support. Founded in 2017, the organization brings together scientists, founders, investors, and operators to accelerate the development and deployment of carbon removal solutions. Through its Launchpad accelerator and Kiloton Fund, AirMiners supports early-stage startups building technologies to remove CO2 from the atmosphere. The platform also operates one of the largest communities in the CDR space, helping talent, capital, and ideas converge to scale the industry.