𝗧𝗵𝗲 $𝟬 𝗔𝗜 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗦𝘁𝗮𝗰𝗸 (𝟮𝟬𝟮𝟲)

𝗧𝗵𝗲 $𝟬 𝗔𝗜 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗦𝘁𝗮𝗰𝗸 (𝟮𝟬𝟮𝟲)

AI is expensive. Model APIs and GPU bills add up. Many build with pricey tools before they know the problem.

You learn and launch AI systems with a $0 stack. $0 is not magic. You pay for hardware and power. But for prototypes and MVPs, a free ecosystem exists.

Real AI systems have layers:

• Frontend: where users click.
• Backend: where logic lives.
• Orchestration: where tasks move.
• LLM: where models run.
• Coding Agent: where you write code faster.
• Data: where memory stays.
• Deployment: where the system lives.

The best architecture is easy to replace and monitor. You do not need a big budget to start. Use local models and open source tools.

This gives you three things:

• Control: you see the stack.
• Independence: no vendor lock-in.
• Pragmatism: pay only when it makes sense.

Avoid paying before you understand the build.

Free tool suggestions:

• Frontend: Next.js and Tailwind CSS.
• Backend: FastAPI or NestJS.
• Orchestration: Hexabot or n8n.
• LLM: Ollama or vLLM.
• Coding: OpenCode or Aider.
• Data: PostgreSQL and pgvector.
• Deployment: Docker and NGINX.

Pick one tool per layer. Build one vertical slice. Prove the system works before the bill arrives.

Source: https://dev.to/marrouchi/the-0-ai-achitecture-stack-2026-3m4n