All stacks

Knowledge Base Stack

Production-ready document Q&A system. Upload documents, ask questions, get cited answers.

$0-50/month6 layers

Best For

Internal wikis, legal document analysis, customer support, research assistants, exam prep

Stack Components

1
Framework

LlamaIndex

Purpose-built for RAG, handles ingestion to query end-to-end

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2
Vector DB

ChromaDB

Simple, fast, integrates seamlessly with LlamaIndex

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3
Embeddings

BGE-Large

Best open-source embeddings for retrieval accuracy

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4
LLM

Claude 3.5 Sonnet

Excellent at following instructions and citing sources

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5
UI

Open WebUI

Chat interface with document upload, RAG-ready out of the box

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6
Fallback

Ollama

Local LLM option for sensitive documents

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Tools in this Stack

Claude Code

Anthropic's official CLI for Claude

Free tierAPIPopular
No credit card required
Limited free usage
API3 models
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Ollama

Run frontier models locally

Open sourceLocalPopular
No credit card required
100% free, unlimited local usage
Local6 models
View Ollama details

LlamaIndex

Production RAG framework

Open sourcePopular
No credit card required
100% open source
Hybrid
View LlamaIndex details

ChromaDB

Simple Python-native vector DB

Open sourcePopular
No credit card required
Free, unlimited local
Hybrid
View ChromaDB details

BGE Embeddings

Best accuracy, self-hostable

Open sourcePopular
No credit card required
Free, self-host or HF
Hybrid
View BGE Embeddings details