Next to its majority stake in Yoast BV, Altha holds a few other, minority, investments. The companies Altha holds investments in :

  • Brouwerij Wijchense¬†Schone
    A local brewery in Wijchen, Altha’s hometown.
  • Mapfit
    Cutting-edge maps with seamless APIs, frameworks, and data licensing at a fraction of what competitors charge. Joost is also an advisor at Mapfit.
  • Peerby
    Peer-to-peer lending.
  • Solarus
    The Solarus PowerCollector‚ĄĘ is a concentrating, hybrid solar photovoltaic and solar thermal panel.
    An online student accommodation marketplace. Joost is also an SEO & Growth advisor at
  • Waka Waka
    WakaWaka creates premium solar products for all markets.