AI Infrastructure
June 2026
6 min read

Build a Private ChatGPT Without OpenAI

Why Organizations Are Moving Away from Public AI

Over the last two years, companies have rapidly adopted AI tools such as ChatGPT. While these tools provide immediate value, many organizations quickly encounter challenges around privacy, compliance, and operational costs.

Sensitive company documents, customer information, internal procedures, and proprietary knowledge often cannot be shared with external AI providers. As a result, organizations are increasingly deploying their own AI infrastructure. A Private ChatGPT solution allows teams to use AI while maintaining complete ownership of data, models, and infrastructure.

What Does a Private ChatGPT Architecture Look Like?

A typical deployment consists of three core components:

  • Open WebUI — provides a modern ChatGPT-style user interface
  • Ollama — runs open-source language models such as DeepSeek, Llama, Gemma, and Mistral
  • Qdrant — stores company knowledge and enables semantic search across documents

Users interact through Open WebUI, which routes requests to Ollama for language model inference and to Qdrant for knowledge retrieval. Everything runs within your own infrastructure boundary.

How Much Infrastructure Do You Need?

For most organizations, a single H200 GPU is more than sufficient. The recommended NexNodo deployment is a Cloud GPU VPS Small:

  • 1× H200 GPU
  • 15 vCPU
  • 256 GB RAM
  • 1 TB Storage
  • $4.90/hr or $3,577/month

This deployment comfortably supports 10–50 concurrent users, thousands of documents, and millions of vector embeddings.

Why This Architecture?

Compared to SaaS AI solutions, a self-hosted deployment offers several structural advantages:

  • No data leaves your infrastructure
  • No per-token charges
  • No API dependency
  • Full model control
  • Predictable monthly costs

For organizations processing sensitive data or operating under compliance requirements, these properties aren't optional — they're requirements.

Deploy in Minutes

NexNodo provides a ready-to-deploy AI Stack Template that automatically provisions GPU infrastructure, Ollama, Open WebUI, and Qdrant together. Start with the Private ChatGPT AI Stack Template and deploy your own AI assistant in minutes.