Ask HN: What's your favorite vector search engine?

For a project I'm working on, a vector search engine is needed: we have a big dataset of strings and their embeddings and we will run a vector-based search on it.

I have used Weaviate in the past, and found it fast and reliable.

Another suggestion was ElasticSearch.

This prompted me to search online for comparison, and a lot of other options presented themselves: Pinecone, Qdrant, etc.

How to choose between them? What do you use? Why do you prefer it to the alternatives?