LangChain vs Medusa

LangChain

Medusa

LangChain · 18 features

• Agents — Tool-using agents with reasoning loops.
• Chains (LCEL) — LangChain Expression Language — pipe primitives into chains.
• Checkpointers (LangGraph) — Persist agent state to SQL, Mongo, Redis, Postgres.
• Document Loaders — 150+ loaders for PDF, HTML, Notion, Google Drive, S3, GitHub, etc.
• Human-in-the-loop — Pause agent for approval, then resume.
• LangGraph — Stateful graph-based agent runtime. Durable, replayable, human-in-the-loop.
• LangGraph Platform — Managed hosting for LangGraph agents with state persistence.
• LangGraph Studio — Desktop IDE for debugging agent graphs.
• LangServe — Deploy chains as FastAPI endpoints.
• Memory — Buffer, summary, entity, vector memory stores.
• Output Parsers — Structured JSON, Pydantic schemas, function calling.
• Prompt Templates — Templating + partial filling + output parsers.
• RAG (Retrieval-Augmented Generation) — Standard patterns + 50+ retrievers.
• Streaming — First-class streaming at every layer.
• Subgraphs — Compose agent graphs hierarchically.
• Text Splitters — Recursive, token, semantic splitters for chunking.
• Tools — 400+ pre-built tools (web search, code, databases, APIs).
• Vector Store Integrations — 60+ vector DBs (Pinecone, Chroma, Weaviate, PGVector, Qdrant, Milvus).

Medusa · 16 features

• Admin Dashboard — React-based admin UI.
• Auth — Customer + admin auth with JWT.
• Cart — Multi-region carts with tax/pricing logic.
• Checkout — Multi-step checkout flow.
• Customers + Groups — Customer records + B2B groups.
• Dynamic Pricing — Price lists, rules, customer-specific.
• Event Bus — Async events via Redis / RabbitMQ.
• File Service — Pluggable storage (S3, local).
• Gift Cards — Native gift-card support.
• Inventory + Multi-warehouse — Stock tracking across locations.
• Next.js Starter — Production-ready Next.js storefront.
• Orders + Fulfillment — Full order lifecycle (edits, returns, exchanges).
• Products + Variants — Products with options, variants, images.
• Promotions + Discounts — Rule-based promos, campaigns.
• Tax Providers — Pluggable tax calculation.
• Workflows Engine — Durable saga-style business logic.