Freetown Waste Transformers
Expanding waste collection operations in Freetown and scaling the DortiBox digital platform.
Founder & CEO: Aminata Dumbuya
Impact
Our Impact
Documenting our compounding impact momentum – from patient capital to stronger local economies.
Evergreen model
Patient capital, reinvested
Using an evergreen impact fund model, RAIN reinvests profits from successful ventures into new start-ups, ensuring sustainable economic growth.
Unlike traditional investors seeking quick returns or philanthropic models that lack longevity, RAIN applies patient capital – a blended approach that prioritises impact, scalability and long-term financial returns. We seek ventures providing innovative solutions for the problems of underserved communities.
The goal is to demonstrate that patient capital can be an effective model for supporting entrepreneurship in underserved markets. By combining long-term investment with hands-on operational support, we hope to encourage broader investment into frontier markets and unlock lasting economic and social value.
2025 Impact Report
Lessons from the founders, partners and stakeholders shaping our work
Our team has dedicated itself to understanding what founders need to succeed in some of Africa’s most underfunded markets, then rolled up its sleeves to help build solutions alongside them.
Explore the 2025 Impact Report to learn what we have learned – and why we believe patient capital has an important role to play in building stronger local economies.
Portfolio
Our Portfolio Companies
Six ventures in Uganda and Sierra Leone, each backed with equity, mentorship and a seat at the board.
6
portfolio companies
2
programme countries in Africa – Uganda and Sierra Leone
3
offices – Cologne, Kampala and Freetown
Nunu Fund
Empowering farmers through finance, stronger operations and tailored, tech-driven solutions.
Founder & CEO: Albert Rwakimari
Kolaborate
Growing through key partnerships, rising revenue and a strengthened team.
Founder & CEO: Pearl D. Gakazi
kolaborate.africaWhisp Health
Health venture in the RAIN portfolio.
Zunie Agri Consultancy
Agricultural venture in the RAIN portfolio.
RentBeta
A rental management platform in Uganda.
rentbeta.africaFounders’ voices
What our portfolio says about working with RAIN
“FWT is thrilled to partner with RAIN as we expand our waste collection operations and scale the DortiBox digital platform in Freetown. Beyond the investment, the technical assistance provided by RAIN has already been invaluable.”
Aminata DumbuyaFounder & CEO, Freetown Waste Transformers
“RAIN didn’t just invest; they rolled up their sleeves. They challenged our thinking, sharpened our strategy, and opened doors we couldn’t access alone. Their support is practical, honest, and catalytic.”
Pearl D. GakaziFounder & CEO, Kolaborate
“Partnering with RAIN has been a game-changer for NUNU Fund. The timely support has helped us empower farmers, enhance our operations, and develop tailored tech-driven solutions. RAIN is the kind of strategic partner every impact-driven venture hopes for.”
Albert RwakimariFounder & CEO, Nunu Fund
Agents of change
You are an impactful start-up? Then apply.
We invest in registered, revenue-generating ventures with a distinct social or environmental impact in Uganda and Sierra Leone.