FFirecrawlFirecrawl (formerly Mendable) · Data collection & crawlingIn-depth entryWeb data API that scrapes, crawls, maps and searches websites and returns clean Markdown or structured JSON for LLM pipelines, with an AGPL-licensed self-hostable coreAGPL-3.0-onlyFreemiumPaidSelf-hostedNov 2, 2026
PpgvectorAndrew Kane (pgvector project) · Vector databasesIn-depth entryPostgreSQL extension adding vector types, distance operators and HNSW/IVFFlat indexes for similarity search inside the databasePostgreSQLOpen sourceFreeSelf-hostedNov 2, 2026
QQdrantQdrant Solutions GmbH · Vector databasesIn-depth entryOpen-source vector search engine written in Rust with filterable HNSW indexes, sparse and multi-vector support, REST/gRPC APIs and a managed cloudApache-2.0Open sourceFreemiumLocalSelf-hostedNov 2, 2026