Haystack vs CometAPI vs Langflow 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
CometAPI
Competitor 2
Langflow
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 CometAPI
cometapi.com
CometAPI functions as an aggregation layer that sits between your application and hundreds of AI model providers
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Competitor Langflow
langflow.org
Drag and drop AI
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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
—
302.3Kvisits/mo
215.3Kvisits/mo
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MoM change
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▲ 9.9%
▼ 0.7%
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6-month growth
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-16.5%
-4.9%
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Global rank web
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#157,147
#217,191
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Avg. last 3 months
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295.7K
225.2K
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Bounce rate lower is better
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46%
44%
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Pages / visit
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2.9
2.2
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Visit duration
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38s
1m 04s
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Traffic sources
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● Direct 69% · ● Referral 30%
● Direct 76% · ● Referral 24%
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HaystackCometAPILangflowSemantic Kernel
0208.6K417.2K625.8K834.4KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3K100K1MCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
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Freemium
Free
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Starting price
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$4per month · free tier available
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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Free Trial FreePay-as-you-go Custom/usage-basedEnterprise Custom/mo
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Capabilities input → output
Input
CodeDocuments
ImagesText
Text
CodeText
Output
Apps
ImagesTextVideo
Apps
Apps
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeAI API
Chatbots & CompanionsDevelopment & CodeProductivity & OfficeAI Agent+3 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
7
6
9
5
Developer tools
Agents
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Agent creation
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LLM development
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APIs
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API integrations
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LLM gateway
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No-code
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RAG
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–
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Chatbots
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Development
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Workflows
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Agent memory
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–
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Image generation
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Self hosted
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Video generation
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
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Saves
0
0
0
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Reviews
0
0
0
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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.