Stack AI vs LangChain vs Haystack vs Langflow

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

Your tool
Stack AI
vs
Competitor 1
LangChain
Competitor 2
Haystack
Competitor 3
Langflow
Compare
4 tools · best value per row highlighted
Your tool Stack AI
stack-ai.com
Connect AI models visually
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Competitor LangChain
langchain.com
Framework for building with large language models
Make main Remove
Competitor Haystack
haystack.deepset.ai
Haystack is an open-source AI orchestration framework from deepset for building production-grade LLM applications and agents.
Make main Remove
Competitor Langflow
langflow.org
Drag and drop AI
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Traffic estimated monthly website traffic
Monthly visits
6.3Kvisits/mo
3.4Mvisits/mo
—
215.3Kvisits/mo
MoM change
▼ 57.9%
▲ 0.7%
—
▼ 0.7%
6-month growth
-93.7%
+21.0%
—
-4.9%
Global rank web
#1,700,092
#13,384
—
#217,191
Avg. last 3 months
13.9K
3.3M
—
225.2K
Bounce rate lower is better
39%
42%
—
44%
Pages / visit
1.8
6.2
—
2.2
Visit duration
14s
5m 29s
—
1m 04s
Traffic sources
—
● Direct 73% · ● Referral 24%
—
● Direct 76% · ● Referral 24%
Stack AILangChainHaystackLangflow
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 · 3.4MLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3K1K10K100K1M10MStack 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 · 3.4MLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
—
Free
Starting price
Free tier
$39per month · free tier available
—
Free
Free tier
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Free trial
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–
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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
DataDocumentsText
CodeText
CodeDocuments
Text
Output
Apps
Apps
Apps
Apps
Skill level
Intermediate
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Chatbots & CompanionsDevelopment & CodeProductivity & OfficeAI Agent+3 more
Tasks what each tool can do · 2 shared · core   partial
Tasks covered
5
6
5
9
Agents
Agent creation
LLM development
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Developer tools
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No-code
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Workflows
–
–
Development
–
–
Chatbots
–
–
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APIs
–
–
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Agent memory
–
–
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Agent testing
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–
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Finance workflow automation
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–
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 1
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
0
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.