Stack AI vs Pipecat vs Zapier 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
Pipecat
Competitor 2
Zapier
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 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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Competitor Zapier
zapier.com
Connect your apps without writing code
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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
—
5.3Mvisits/mo
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MoM change
▼ 57.9%
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▼ 5.9%
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6-month growth
-93.7%
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-26.7%
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Global rank web
#1,700,092
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#6,051
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Avg. last 3 months
13.9K
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5.5M
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Bounce rate lower is better
39%
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38%
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Pages / visit
1.8
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10.2
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Visit duration
14s
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6m 43s
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Traffic sources
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● Direct 81% · ● Referral 12%
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Stack AIPipecatZapierHaystack
01.8M3.6M5.5M7.3MStack 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 · 6.3KZapier · 6.3MZapier · 5.9MZapier · 6.8MZapier · 6.5MZapier · 7.3MZapier · 6.6MZapier · 6MZapier · 5.5MZapier · 5.7MZapier · 5.3M1K10K100K1M10MStack 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 · 6.3KZapier · 6.3MZapier · 5.9MZapier · 6.8MZapier · 6.5MZapier · 7.3MZapier · 6.6MZapier · 6MZapier · 5.5MZapier · 5.7MZapier · 5.3MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Free
Freemium
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Starting price
Free tier
Free
$19.99per 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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Open source Free
Free FreeProfessional $19.99/moTeam $69/moEnterprise Custom
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Capabilities input → output
Input
DataDocumentsText
AudioTextVideo
Text
CodeDocuments
Output
Apps
AudioText
Apps
Apps
Skill level
Intermediate
Advanced
Intermediate
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeProductivity & OfficeVoice & SpeechAI Agent+2 more
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
7
10
6
7
Agents
Agent creation
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No-code
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Workflows
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Developer tools
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Self hosted
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LLM development
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RAG
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Voice agents
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Business automation
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Process automation
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Voice
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Voice assistance
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Agent collaboration
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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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Lead generation
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Lead management
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Productivity
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 1
▲ 0
Saves
0
0
0
0
Reviews
0
0
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0
Prompts
0
0
0
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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.