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

  • Peerby
    Peer-to-peer lending.
    An online student accommodation marketplace. Joost is also an SEO & Growth advisor at
  • WordProof
    WordProof helps improve the safety of the web by allowing the timestamping of content on the blockchain. See news article.