Agent Framework

Haystack vs LangGraph: Which is Better in 2026?

Choosing between Haystack and LangGraph? Both are popular agent framework tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.

Quick verdict

Both Haystack and LangGraph are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences. In our catalog, LangGraph rates slightly higher (4.5 vs 4.2 out of 5).

Haystack vs LangGraph — Side by Side

HaystackLangGraph
CategoryAgent FrameworkAgent Framework
PricingFreeFree
Starting priceFree tier availableFree tier available
Free tier
Rating4.24.5
Best forAgent Framework — rag, retrievalAgent Framework — ai, llm

Pros & Cons

Haystack
Haystack
  • Best retrieval abstractions of the group
  • Pipelines are explicit and debuggable
  • Production-minded from the start
  • Smaller ecosystem than LangChain
  • Pipeline model takes a while to click
LangGraph
LangGraph
  • Fine-grained agent control
  • Great for complex multi-step flows
  • Open-source
  • Integrates with LangChain & LangSmith
  • Steeper learning curve
  • Newer than core LangChain

Key Features Compared

Haystack

  • Composable pipelines
  • Retrieval and RAG components
  • Agent and tool support
  • Evaluation tooling

LangGraph

  • Free open-source library
  • Stateful agent graphs
  • Human-in-the-loop
  • Durable execution

Choose Haystack if…

  • You want a free tier to validate before paying.
  • Best retrieval abstractions of the group
  • Pipelines are explicit and debuggable
  • Production-minded from the start
Haystack review & pricing

Choose LangGraph if…

  • You want a free tier to validate before paying.
  • Fine-grained agent control
  • Great for complex multi-step flows
  • Open-source
LangGraph review & pricing

Frequently Asked Questions

Is Haystack better than LangGraph?⌄

Both Haystack and LangGraph are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences. In our catalog, LangGraph rates slightly higher (4.5 vs 4.2 out of 5).

What is the difference between Haystack and LangGraph?⌄

Haystack — deepset's pipeline framework for RAG and agents, strongest on retrieval. LangGraph — Open-source library for building stateful, multi-step agent workflows as graphs — with a managed platform option. Both are agent framework tools; the comparison table above breaks down pricing, free tiers, and what each is best for.

Haystack vs LangGraph: which is cheaper?⌄

Haystack pricing: Free. LangGraph pricing: Free. Confirm current pricing on each tool's official site, as plans change.

Which is rated higher, Haystack or LangGraph?⌄

In our catalog, Haystack rates 4.2 out of 5 and LangGraph rates 4.5 out of 5, so LangGraph has a slight edge on reviews.

See more options in our guide to the best agent framework tools for startups.

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