We provide data services to Governments, The UN family, The Global Fund, Dutch municipalities and non profit foundations operating around the world. We provide bespoke solutions to publish and visualise (open) data via data platforms and portals, showing the public where funding originates from and how it is spent.

We work together with the following partners & clients:

If you have any questions about these projects or have a new business inquiry please contact Siem Vaessen.


Zimmerman & Zimmerman

Oostelijke Handelskade 12H
1019 BM Amsterdam
The Netherlands

Tel: +3120 3318668 or +31203312967


Information about Zimmerman & Zimmerman can be found at the Dutch Chamber of Commerce number: KvK 51018586