Altha BV (a Dutch limited liability company) is the holding company for Joost de Valk & Marieke van de Rakt. Marieke and Joost made their money by building up Yoast. They’ve sold Yoast in 2021, Altha holds all of their investments.

Altha invests in companies that play on the world wide web. A lot of our investments have ties to the WordPress ecosystem. We’d like to think they all make the web a better place by being who they are. We like to be close to our portfolio companies. We’re not there to tell them what to do but instead to cheer them on and give them advice when they ask for it. With our combined experience in running a scale up and development and marketing acumen, we can help our the companies we invest in excel.

Marieke van de Rakt

Marieke, managing partner at Altha, obtained her Ph. D. in social sciences at the Radboud University in Nijmegen, specializing in criminology. She went on to teach and consult in several institutions before joining Joost at Yoast, where she was the CEO for 3 years until the end of 2021. After successfully selling Yoast to Newfold Digital she became Yoast’s Head of Strategy.

Marieke blogs on

Marieke van de Rakt, managing partner at Altha.

Joost de Valk

Joost, the other managing partner at Altha, is the founder of Yoast where he’s currently an advisor. Before founding Yoast he had a career in several digital marketing agencies in the Netherlands. He’s been consulting on SEO for more than 15 years, with a leading role on some of the largest SEO projects in the world.

Joost blogs on

Joost de Valk, managing partner at Altha.

Origin of the name Altha

Altha is derived from Althazzar, which was Joost’s nick in his early days online. Later on we found out that Altha is actually also a species of moth therefore we decided to adapt our logo to that.