The toolbox
80 tools worth knowing about if you build with AI. No affiliate links, no paid placement, and no prices quoted β tiers change monthly and a stale price helps nobody.
LangChain
open-sourceFramework for building LLM applications, with abstractions for chains, retrieval, agents and integrations.
Best for: Composing LLM pipelines
LlamaIndex
open-sourceData framework for connecting private documents and databases to language models for retrieval and agents.
Best for: Retrieval over your own data
Pinecone
freemiumManaged vector database for similarity search over embeddings, with hybrid search and metadata filtering.
Best for: Managed vector search
Qdrant
open-sourceOpen-source vector database written in Rust, available self-hosted or as a managed cloud service.
Best for: Self-hosted vector search
Firecrawl
freemiumAPI that crawls websites and returns clean markdown or structured data suitable for LLM input.
Best for: Turning web pages into context
Langfuse
open-sourceOpen-source observability platform for LLM applications, covering tracing, evaluation and prompt management.
Best for: Tracing and evaluating LLM apps