Haystack vs Stack AI vs CrewAI vs Semantic Kernel

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
CrewAI
Competitor 3
Semantic Kernel
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 CrewAI
crewai.com
CrewAI is a multi-agent platform that covers the full agent lifecycle for businesses: discover what to automate, build agents, govern them in production and optimize them over time.
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Competitor Semantic Kernel
learn.microsoft.com
Semantic Kernel is a lightweight, open-source development kit from Microsoft for building AI agents and adding AI models to existing C#, Python or Java codebases.
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Traffic estimated monthly website traffic
Monthly visits
—
6.3Kvisits/mo
476.6Kvisits/mo
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MoM change
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▼ 57.9%
▼ 10.3%
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6-month growth
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-93.7%
-5.3%
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Global rank web
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#1,700,092
#107,487
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Avg. last 3 months
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13.9K
564.3K
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Bounce rate lower is better
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39%
46%
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Pages / visit
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1.8
2.6
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Visit duration
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14s
1m 32s
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Traffic sources
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● Direct 75% · ● Referral 23%
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HaystackStack AICrewAISemantic Kernel
0171.3K342.6K513.9K685.2KStack 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 · 6.3KCrewAI · 408.9KCrewAI · 417.1KCrewAI · 521.4KCrewAI · 503.5KCrewAI · 610.1KCrewAI · 646.1KCrewAI · 685.2KCrewAI · 531.1KCrewAI · 476.6K1K10K100K1MStack 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 · 6.3KCrewAI · 408.9KCrewAI · 417.1KCrewAI · 521.4KCrewAI · 503.5KCrewAI · 610.1KCrewAI · 646.1KCrewAI · 685.2KCrewAI · 531.1KCrewAI · 476.6KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
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Freemium
Free
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Starting price
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Free tier
Free
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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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Basic FreeEnterprise $0
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Capabilities input → output
Input
CodeDocuments
DataDocumentsText
Text
CodeText
Output
Apps
Apps
AppsCode
Apps
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+2 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
2
3
9
2
Agents
Agent creation
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Workflows
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No-code
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Agent collaboration
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–
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Agent management
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–
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Developer tools
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Agent testing
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–
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Development
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 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.