Haystack vs Stack AI vs CometAPI vs Pipecat

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
CometAPI
Competitor 3
Pipecat
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 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 Pipecat
pipecat.ai
Pipecat is an open-source Python framework for building voice and multimodal AI agents that talk in real time.
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Traffic estimated monthly website traffic
Monthly visits
—
6.3Kvisits/mo
302.3Kvisits/mo
—
MoM change
—
▼ 57.9%
▲ 9.9%
—
6-month growth
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-93.7%
-16.5%
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Global rank web
—
#1,700,092
#157,147
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Avg. last 3 months
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13.9K
295.7K
—
Bounce rate lower is better
—
39%
46%
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Pages / visit
—
1.8
2.9
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Visit duration
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14s
38s
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Traffic sources
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—
● Direct 69% · ● Referral 30%
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HaystackStack AICometAPIPipecat
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 · 6.3KCometAPI · 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 · 6.3KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
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Freemium
Freemium
Free
Starting price
—
Free tier
$4per 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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Free Trial FreePay-as-you-go Custom/usage-basedEnterprise Custom/mo
Open source Free
Capabilities input → output
Input
DocumentsCode
DataTextDocuments
TextImages
VideoTextAudio
Output
Apps
Apps
VideoTextImages
TextAudio
Skill level
Advanced
Intermediate
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeAI API
Development & CodeProductivity & OfficeVoice & SpeechAI Agent+2 more
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
7
7
6
10
Agents
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Agent creation
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Developer tools
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Self hosted
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APIs
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LLM development
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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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Voice agents
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Workflows
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–
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API integrations
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Business automation
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–
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Process automation
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–
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Voice
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Voice assistance
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Agent collaboration
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–
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Agent memory
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Agent testing
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Call agents
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Finance workflow automation
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Image generation
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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.