Based on testing of various hosts for self-hosted AI tools, a regular VPS is usually enough for simple AI apps and light workloads, while demanding models require a GPU. The 8 best VPS providers identified are Hostinger, DigitalOcean, Vultr, Hetzner, Linode (Akamai Cloud), Scaleway, IONOS, and Contabo. Hardware requirements vary by tool: Open WebUI is very lightweight, running on 1 CPU core and 1GB RAM; Ollama requires 8–16GB+ RAM and works fastest on GPUs; n8n runs on 1 CPU core and 2GB RAM; Flowise requires 1–2 CPU cores and 2GB RAM; and Langflow requires 2 CPU cores and 4GB RAM.