How InfoVibeX Deploys Multi-Tenant SaaS on a Single VPS
A practical walkthrough of how we use PM2, Nginx, and MongoDB to run multiple isolated client environments on one server without compromising performance or security.
The Challenge
Running multiple client environments on a single server sounds risky. In practice, with the right architecture, it is one of the most cost-effective and maintainable approaches for early-stage SaaS providers.
Our Stack
How It Works
Each client gets their own subdomain (e.g. *miumedbilling.infovibex.com*), their own PM2 process running on a dedicated port, and their own MongoDB database. Nginx routes incoming requests by hostname to the correct port.
This means a bug in one tenant environment cannot affect another, and each client has full data isolation.
The Result
We run two live tenants today on a single 2GB VPS with 99.9% uptime, sub-200ms response times, and zero cross-tenant data leakage. Scaling to 10 tenants on the same box is entirely feasible.
This approach lets us offer enterprise-grade isolation at startup pricing.