Yes. AliasVault, Passbolt, KeePassXC and Proton Pass are free or have a free plan, according to the pricing each company publishes. Free plans usually carry limits; each product page links to the company's terms.
Which European password managers are open source?
Passbolt, KeePassXC and Proton Pass publish their source code under an open-source licence. Each product page shows the licence and where the code is.
Which European password managers can you host yourself?
AliasVault and Passbolt can be run on your own servers, according to their own documentation.
