AliasVault is a product of XIVISOFT, a Dutch sole proprietorship (eenmanszaak) operated by founder Leendert de Borst, KVK (Dutch Chamber of Commerce) number 51592193; the registered address is stated as "available upon request" rather than published, and no VAT number is stated. It combines a zero-knowledge password manager with built-in email-alias generation: every saved identity gets its own alias inbox inside the app. The official cloud offering (app.aliasvault.com) runs on the operator's own servers in Germany, within the EU; the Privacy Policy states this is "fully compliant with GDPR". The single most important buying fact is a structural limitation stated on AliasVault's own homepage: "Email aliases are receive-only, meaning you cannot send or reply to emails from your aliases", with a 10MB size limit on incoming mail. The core product is free and the vendor states it "will always remain that way"; Premium and Family tiers (higher limits, VIP alias domains, custom domains, automatic backups) are announced but not yet live as of this review. The client and server are open source under AGPL-3.0 (github.com/aliasvault/aliasvault, most recent release 0.30.0 on 2026-07-02) and fully self-hostable via Docker, which is also the only way to get a custom domain today, since none is available on the free cloud tier. No DPA or sub-processors list is published; the only named third party in the Privacy Policy is a self-hosted instance of Plausible.io analytics, run on AliasVault's own servers rather than Plausible's own hosted service.