Emilia Capital joins Patchstack’s $5M Series A in open-source security
Patchstack raises $5M Series A with participation from Emilia Capital, the fund founded by Joost de Valk and Marieke van de Rakt after Yoast.
Emilia Capital appears in Patchstack’s five million dollar Series A round, a relevant move for anyone tracking security infrastructure around open source software. The financing was reported with Emilia alongside other investors backing Patchstack’s next growth phase.
The founder context is important here. Emilia Capital was founded by Joost de Valk and Marieke van de Rakt after building and selling Yoast, so their portfolio lens is deeply rooted in real software product experience, especially in and around the WordPress ecosystem.
Patchstack itself is a strong fit with that thesis: practical security tooling, a large vulnerability dataset, and clear market demand from teams that cannot afford weak plugin and theme security workflows. This is not a hype category. It is a recurring operational problem with direct business impact.
For visitors who do not know Emilia Capital yet, this is a good introductory signal of what the fund actually does: backing technical companies where product depth and long-term infrastructure value matter more than narrative polish.