Password managers are essential in 2026. But why pay €35–€60 per year to store your most sensitive data on someone else's server? I run Vaultwarden on a Raspberry Pi 4 with Home Assistant. Total cost: ~€10/year for the domain. Everything else is free forever. Here's the full setup. What You Need Hardware: Raspberry Pi 4 (2GB+ RAM) — Pi 5 also works SSD recommended for reliability Stable internet connection Free accounts: Cloudflare — for domain, tunnel and email routing Tailscale — optional backup access Free software: Home Assistant OS running on your Pi Bitwarden app (Android, iOS, Windows, Mac, Linux) Bitwarden browser extension (Chrome, Firefox, Edge, Safari) What You'll Build By the end of this guide you'll have: ✅ Vaultwarden running privately on your Pi ✅ Accessible from anywhere via vault.yourdomain.com ✅ HTTPS encryption — no open ports on your router ✅ Free email aliases as a bonus ✅ All official Bitwarden clients working normally Chapter 1 — Install Vaultwarden on Home Assistant Vaultwarden is a…