Drostan is a brand that offers innovative solutions for online collaboration and data sharing. Led by Rolf Kleef, a sociotechnical trailblazer for civil society, Drostan aims to help teams and organizations achieve their goals and enhance their learning experiences. Their services include guidance on collaborating online with colleagues and partner organizations, managing and marketing websites, improving discussion processes and policy-making through the use of the internet, and cultivating online communities.

Rolf draws inspiration from grassroots and consensus-based communities, as well as open-source organizations and the art world, which challenge assumptions and promote sharing and respect. With over 25 years of experience, Rolf has worked with renowned organizations such as Greenpeace and Friends of the Earth, providing internet-based communication tools to foster effective collaboration. Drostan's expertise lies in developing tailor-made websites for monitoring and evaluation, along with online surveys primarily focused on the international development sector.

By staying connected to evolving technologies, Drostan ensures that their clients can navigate the ever-changing landscape and make use of the latest tools and processes