Best AI developer infrastructure

28 ai developer infrastructure in the Tool Hut catalog — compare them, find alternatives, and track the ones you actually use.

• LangChain

  Framework for building LLM-powered apps — chains, agents, RAG, memory, tool use.

• LlamaIndex

  Data framework for LLMs — index, query, and retrieve from any data source.

• Weights & Biases

  MLOps platform — experiment tracking, model evaluation, fine-tuning monitoring.

• Hugging Face Spaces

  Free hosting for ML demos and Gradio/Streamlit apps — try any model instantly.

• Firecrawl

  Web scraping API for AI — turns any URL into clean markdown for LLM ingestion and RAG pipelines.

• Pinecone

  Managed vector database — store and query billions of embeddings for semantic search and RAG at scale.

• Weaviate

  Open-source vector database with hybrid search for AI apps.

• Chroma

  Lightweight open-source embedding database for prototyping RAG.

• Qdrant

  High-performance open-source vector database written in Rust.

• pgvector

  Postgres extension that adds vector similarity search to your DB.

• LangSmith

  LangChain's platform for tracing, testing, and monitoring LLM apps.

• Langfuse

  Open-source LLM observability, tracing, and prompt management.

• Helicone

  Open-source observability and cost tracking proxy for LLM calls.

• Braintrust

  Eval and prompt-iteration platform for shipping reliable AI features.

• Arize Phoenix

  Open-source tracing and evaluation for LLM and RAG pipelines.

• Ragas

  Open-source framework for evaluating RAG pipeline quality.

• Haystack

  deepset's open-source framework for RAG and search pipelines.

• DSPy

  Stanford framework for programming — not prompting — language models.

• Instructor

  Get structured, validated JSON out of LLMs using Pydantic.

• Pydantic AI

  Type-safe agent framework from the Pydantic team.

• Semantic Kernel

  Microsoft's SDK for orchestrating models, memory, and plugins.

• Apify

  Web scraping and automation platform that feeds clean data to AI.

• Bright Data

  Large-scale web data collection and proxy infrastructure for AI.

• Tavily

  Search API built for LLM agents — clean, citation-ready results.

• LlamaParse

  LlamaIndex's parser that turns messy PDFs into clean data for RAG.

• Jina AI

  Embeddings, rerankers, and a reader API for building search and RAG.

• Streamlit

  Turn Python scripts into shareable data and AI web apps fast.

• Chainlit

  Open-source framework for building chat UIs over your LLM app.