Search & Retrieval

BackSearch

Point-in-time web search and page fetch over a frozen archive. Query the web as it existed on any past date, reproducibly.

CocoIndex

Open-source incremental data framework for AI agents. Keep codebases, docs, and knowledge continuously indexed — fresh context, zero re-processing. Python API.

Exa

The Exa Web search API retrieves the best, realtime data from the web for your AI

Parallel Search

The highest accuracy web search API, built from the ground up for AIs.

pgContext

A full AI search engine, built into Postgres. Hybrid dense + full-text retrieval, filter-aware ANN, and exact, MVCC-visible re-scoring: a dedicated vector engine's feature set, as a PostgreSQL 17 extension.

Pinecone

Search through billions of items for similar matches to any object, in milliseconds. It's the next generation of search, an API call away.

Scout

Open Source Company Brain

Supavec

The open-source alternative to Carbon.ai. Build powerful RAG applications with any data source, at any scale.

turbopuffer

vector and full-text search built on object storage: fast, 10x cheaper, and extremely scalable

TypeGraph

TypeScript-first embedded knowledge graph library. TypeGraph brings property graph modeling and practical ontology support to your existing SQLite or PostgreSQL database. Define nodes and edges with Zod, query with a fluent TypeScript API, and keep graph + app data in one deployment.

ZeroEntropy Rerankers

Reorders your search candidates so the actual answer beats the lookalike sitting next to it. zerank-2 tops every public reranker leaderboard at 2–3× the speed and a fraction the cost of an LLM doing the same job.