The Best AI Tools for Writing Product Specs, Ranked and Tested

This article evaluates leading AI tools for creating product requirement documents, comparing general-purpose chatbots like ChatGPT with purpose-built PM agents like Productboard Spark. The analysis reveals that context handling - a tool’s ability to retain and reuse company information like strategy docs, personas, and competitive intel across sessions - makes specialized agents more valuable for teams writing specs at scale than tools that reset between conversations.