# I Thought Azure Had Three OCR Services. I Was Completely Wrong. > Source: > Published: 2026-07-17 11:49:44+00:00 Member-only story # I Thought Azure Had Three OCR Services. I Was Completely Wrong. The first time I opened the Azure AI documentation and came across **Azure AI Vision**, **Azure Document Intelligence**, and **Azure Content Understanding**, I had one question: Didn’t Microsoft just rename OCR three different times? After all, all three seemed to accept images or documents as input. They all talked about extracting information. They all sounded incredibly smart. And like every developer who thinks they understand something after reading the first paragraph of the documentation, I confidently assumed they were basically the same thing. Spoiler alert: they aren’t. After building a few document processing solutions and spending more time with these services, I realized Microsoft isn’t trying to sell three OCR products. They’re solving three completely different business problems that just happen to start with an image or document. If you’re trying to decide which one belongs in your architecture or you’re simply curious about how they differ, hopefully this article saves you a few hours (or days) of reading documentation. ## Let’s start with a simple analogy Imagine you’ve hired three employees.