Stack AI vs Langflow vs CometAPI vs Haystack

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

Your tool
Stack AI
vs
Competitor 1
Langflow
Competitor 2
CometAPI
Competitor 3
Haystack
Compare
4 tools · best value per row highlighted
Your tool Stack AI
stack-ai.com
Connect AI models visually
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Competitor Langflow
langflow.org
Drag and drop AI
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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 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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Traffic estimated monthly website traffic
Monthly visits
6.3Kvisits/mo
215.3Kvisits/mo
302.3Kvisits/mo
—
MoM change
▼ 57.9%
▼ 0.7%
▲ 9.9%
—
6-month growth
-93.7%
-4.9%
-16.5%
—
Global rank web
#1,700,092
#217,191
#157,147
—
Avg. last 3 months
13.9K
225.2K
295.7K
—
Bounce rate lower is better
39%
44%
46%
—
Pages / visit
1.8
2.2
2.9
—
Visit duration
14s
1m 04s
38s
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Traffic sources
—
● Direct 76% · ● Referral 24%
● Direct 69% · ● Referral 30%
—
Stack AILangflowCometAPIHaystack
0208.6K417.2K625.8K834.4KStack 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 · 6.3KLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3K1K10K100K1MStack 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 · 6.3KLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Free
Freemium
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Starting price
Free tier
Free
$4per month · free tier available
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Free tier
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Free trial
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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
DataDocumentsText
Text
ImagesText
CodeDocuments
Output
Apps
Apps
ImagesTextVideo
Apps
Skill level
Intermediate
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Chatbots & CompanionsDevelopment & CodeProductivity & OfficeAI Agent+3 more
Development & CodeAI API
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
7
9
6
7
Agents
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Agent creation
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Developer tools
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No-code
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LLM development
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Workflows
–
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APIs
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LLM gateway
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–
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RAG
–
–
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API integrations
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–
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Business automation
–
–
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Chatbots
–
–
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Development
–
–
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Process automation
–
–
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Agent memory
–
–
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Finance workflow automation
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–
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Image generation
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–
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Self hosted
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–
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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
▲ 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.