Haystack vs Microsoft Copilot

Which should you choose?

These tools serve entirely different purposes and audiences. Haystack is a developer framework for building custom AI applications—you're the engineer writing the orchestration logic. Copilot is an end-user assistant for productivity tasks within Microsoft's ecosystem. Pick Haystack if you're building RAG systems, agents, or proprietary AI products requiring full control and multi-model flexibility. Pick Copilot if you're a professional or student wanting ready-made AI assistance integrated into Word, Excel, and email. They don't compete; they're in different categories.