Elasticsearch, released by Elastic in 2012, is a distributed search and analytics engine that scales to PB-level data with sub-second full-text retrieval, forming the core of the ELK Stack with 40M+ monthly downloads.
Pinecone is a fully managed vector database provider founded in 2019 in San Francisco by Edo Liberty, built for RAG, semantic search and recommendation systems. Its serverless architecture bills by usage and serves 1B+ vectors in milliseconds.
Jina AI is an open-source AI company founded in 2020, providing Jina Embeddings, Reranker and Reader as a complete open-source infrastructure for RAG and multimodal search, with free-tier and pay-as-you-go cloud APIs.