Technology
Our Technology Stack
We believe in proven, open source software. No proprietary lock-in, no vendor dependencies. Our entire infrastructure runs on FreeBSD, one of the oldest and most stable operating systems. It powers Netflix, WhatsApp, and now your website.
The Stack
What Powers Your Site
Operating System
- OS FreeBSD - Rock-solid UNIX with ZFS, jails, and incredible network performance
- FS ZFS - Self-healing filesystem with snapshots, compression, and built-in RAID
- VM bhyve - Native hypervisor for VPS isolation with near-bare-metal performance
Web Stack
- HTTP Apache - Battle-tested web server with HTTP/2 and mod_security
- DB MariaDB - MySQL-compatible database with modern optimizations
- LANG PHP, Python, Node.js - Latest stable versions of all major runtimes
Security
- TLS TLS Encryption + DANE - Automatic certificates with DNS-based authentication
- FW PF Firewall - OpenBSD's packet filter with rate limiting and DDoS mitigation
- CA Pacy World Root CA - Our own certificate authority for maximum protection
- MTA Postfix - High-performance mail transfer agent with SPF/DKIM/DMARC
- IMAP Dovecot - IMAP/POP3 server with full-text search and Sieve filtering
- SPAM Rspamd - Modern anti-spam with machine learning and greylisting
Philosophy
Why Open Source?
We choose open source software for the same reasons our customers choose us: transparency, reliability, and no vendor lock-in.
Every component in our stack has been battle-tested by millions of deployments worldwide. We contribute back to the projects we depend on because a healthy ecosystem benefits everyone.
When you host with Pacy World, your data lives on formats and protocols that are open standards. If you ever decide to leave (though we hope you won't), your data comes with you, no questions asked.