When AWS announced DynamoDB Vector Search last week, my first thought was... didn't AWS just launch S3 Vectors?

I mean, S3 Vectors went GA back in December. It's been less than a year, and now we have another service that stores vectors and does similarity search. I'll be honest, I was a bit puzzled. So I decided to dig in and figure out what's going on.

The AWS vector landscape

Before we get into DynamoDB Vector Search specifically, let's acknowledge the elephant in the room. AWS already has vector capabilities in a lot of places:

Amazon OpenSearch