VPS provider to host a conversation-based chat web app

I'm looking for a reliable VPS provider to host a conversation-based chat web app. The stack is Python (FastAPI) using Gunicorn behind Nginx. So I’ll need a VPS that can comfortably handle:

• Nginx as the reverse proxy
• Gunicorn app server
• Decent performance for concurrent users

• 1–2 vCPU
• At least 2GB RAM
• SSD storage
• Ubuntu/Debian preferred

For your stack (FastAPI + Gunicorn behind Nginx), a KVM-based VPS with 2 vCPU and 2GB RAM should be more than enough for moderate chat traffic. Make sure the provider offers good SSD I/O and avoids overselling. Ubuntu 22.04 or Debian 12 is solid and well supported. If you ever plan to scale or deal with stricter IP reputation management (e.g., user management, real-time features), VPS setups with mobile IPs could provide a more resilient and flexible infrastructure depending on your use case.

Hetzner Cloud – solid performance, generous bandwidth, and great pricing (especially in the EU)
Vultr or Linode – simple setup, good global reach, and stable for Python stacks
DigitalOcean – very beginner-friendly with good documentation and 1-click apps