Redis uses too much memory and supports only two NN algorithms FLAT (very slow) and HNSW if you start indexing millions of large vectors you will quickly understand the problem.
That being said, many of these DBs are overcomplicated for most use cases. Redis HNSW will work for many use cases.
That being said, many of these DBs are overcomplicated for most use cases. Redis HNSW will work for many use cases.