Agent Framework

AutoGen vs Haystack: Which is Better in 2026?

Choosing between AutoGen and Haystack? 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 AutoGen and Haystack are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences. In our catalog, AutoGen rates slightly higher (4.4 vs 4.2 out of 5).

AutoGen vs Haystack — Side by Side

AutoGenHaystack
CategoryAgent FrameworkAgent Framework
PricingFreeFree
Starting priceFree tier availableFree tier available
Free tier
Rating4.44.2
Best forAgent Framework — ai, llmAgent Framework — rag, retrieval

Pros & Cons

AutoGen
AutoGen
  • Backed by Microsoft Research
  • Strong multi-agent conversation model
  • Completely free
  • Active development
  • APIs have shifted between versions
  • Python-centric
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

Key Features Compared

AutoGen

  • Free open-source (Microsoft)
  • Multi-agent conversations
  • Tool use & code execution
  • Human-in-the-loop

Haystack

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

Choose AutoGen if…

  • You want a free tier to validate before paying.
  • Backed by Microsoft Research
  • Strong multi-agent conversation model
  • Completely free
AutoGen review & pricing

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

Frequently Asked Questions

Is AutoGen better than Haystack?⌄

Both AutoGen and Haystack are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences. In our catalog, AutoGen rates slightly higher (4.4 vs 4.2 out of 5).

What is the difference between AutoGen and Haystack?⌄

AutoGen — Microsoft's open-source framework for multi-agent conversations and orchestration. Free to use. Haystack — deepset's pipeline framework for RAG and agents, strongest on retrieval. Both are agent framework tools; the comparison table above breaks down pricing, free tiers, and what each is best for.

AutoGen vs Haystack: which is cheaper?⌄

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

Which is rated higher, AutoGen or Haystack?⌄

In our catalog, AutoGen rates 4.4 out of 5 and Haystack rates 4.2 out of 5, so AutoGen has a slight edge on reviews.

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

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