If you want a free agentic AI course with certificate in 2026, the Hugging Face AI Agents Course is the one to start. It costs nothing, the certificate is included rather than gated behind a membership, and the syllabus is vendor-neutral across smolagents, LlamaIndex and LangGraph. Verdict: Hugging Face wins for most learners. Pair it with Microsoft's AI Agents for Beginners as your free code-first textbook (no certificate). Take Anthropic Academy as a second free certificate if you w...