Haystack vs Stack AI vs LangChain vs OpenAI Agents SDK

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
Haystack
vs
Competitor 1
Stack AI
Competitor 2
LangChain
Competitor 3
OAOpenAI Agents SDK
Compare
4 tools · best value per row highlighted
Your tool Haystack
haystack.deepset.ai
Haystack is an open-source AI orchestration framework from deepset for building production-grade LLM applications and agents.
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Competitor Stack AI
stack-ai.com
Connect AI models visually
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Competitor LangChain
langchain.com
Framework for building with large language models
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Competitor OAOpenAI Agents SDK
openai.github.io
The OpenAI Agents SDK is a Python package for building agentic applications with very few abstractions.
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Traffic estimated monthly website traffic
Monthly visits
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6.3Kvisits/mo
3.4Mvisits/mo
—
MoM change
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▼ 57.9%
▲ 0.7%
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6-month growth
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-93.7%
+21.0%
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Global rank web
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#1,700,092
#13,384
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Avg. last 3 months
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13.9K
3.3M
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Bounce rate lower is better
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39%
42%
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Pages / visit
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1.8
6.2
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Visit duration
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14s
5m 29s
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Traffic sources
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● Direct 73% · ● Referral 24%
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HaystackStack AILangChainOpenAI Agents SDK
0850.7K1.7M2.6M3.4MStack AI · 143.4KStack AI · 153.7KStack AI · 167.9KStack AI · 160KStack AI · 99.4KStack AI · 35.9KStack AI · 17.4KStack AI · 20.6KStack AI · 14.9KStack AI · 6.3KLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4M1K10K100K1M10MStack AI · 143.4KStack AI · 153.7KStack AI · 167.9KStack AI · 160KStack AI · 99.4KStack AI · 35.9KStack AI · 17.4KStack AI · 20.6KStack AI · 14.9KStack AI · 6.3KLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
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Freemium
Freemium
Free
Starting price
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Free tier
$39per month · free tier available
Free
Free tier
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Free trial
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API access
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Plans
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Developer FreePlus $39/moEnterprise Custom/mo
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Capabilities input → output
Input
CodeDocuments
DataDocumentsText
CodeText
AudioCodeText
Output
Apps
Apps
Apps
AppsAudio
Skill level
Advanced
Intermediate
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Tasks what each tool can do · 2 shared · core   partial
Tasks covered
5
5
6
5
Agents
Agent creation
Developer tools
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LLM development
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No-code
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Workflows
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Development
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Agent collaboration
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Agent memory
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Agent testing
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Finance workflow automation
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Voice agents
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 1
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
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Verified listing
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.