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123 tools · 10 stacks
GitHub

AI tools are all over the place. This is the full landscape — 123 tools across 12 categories, mapped and connected. Ready to narrow it down? Build your stack →

Stack Layers
What are you building and how is it defined?
How do you write and ship code?
How does your AI think and act?
Which models and infrastructure power it?
How do you build, observe, and extend it?
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These tools integrates with
OpenAI API
vs
LlamaIndex

Choose OpenAI API when…

  • •You need the broadest ecosystem and most integrations
  • •GPT-4 or o-series reasoning models are required
  • •Assistants API, fine-tuning, or batch API are needed

Choose LlamaIndex when…

  • •You're building RAG or knowledge base apps
  • •Structured data querying over documents is your focus
  • •You need powerful index and retrieval primitives
Field
OpenAI API
LlamaIndex
Category
LLM Infrastructure
Pipelines & RAG
Type
SaaS
OSS
Free Tier
✗ No
✓ Yes
Plans
API: Per token
—
Stars
—
⭐ 37,000

OpenAI API

API access to GPT-4o, o1, and other OpenAI models including embeddings and image generation. The most widely used LLM API in production.

LlamaIndex

Framework specialized in data ingestion, indexing, and retrieval for LLM applications. The go-to for complex RAG pipelines.

OpenAI API Website ↗
LlamaIndex Website ↗GitHub ↗

Shared Connections (4)

LangChainLiteLLMLangfuseAnthropic API

Only OpenAI API (17)

CrewAIAutoGenLlamaIndexMastraPydanticAIsmolagentsAgnoPortKey

Only LlamaIndex (12)

CursorLangGraphQdrantChromapgvectorWeaviateOllamaRAGAS
See full comparison in Explore →