As mentioned in the article, I recommend Milvus (https://milvus.io) - it's open source and cloud native with standalone versions available. Alternatively, if you're looking for an open-source solution for generating embeddings, I recommend (https://github.com/towhee-io/towhee).
One downside for milvus is that version 1 doesn't do filtering (necessary for most search applications) and version 2 is significantly slower.
Google's vector nearest neighbors offering, weaviate, and Vespa are much better options if you're expecting to extend to more realistic workloads
