Vapi vs Haystack vs Hal vs PolyAI

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

Your tool
Vapi
vs
Competitor 1
Haystack
Competitor 2
Hal
Competitor 3
PolyAI
Compare
4 tools · best value per row highlighted
Your tool Vapi
vapi.ai
Vapi is a developer platform for building, testing and deploying voice AI agents that talk to customers on the phone.
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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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Competitor Hal
hal9.com
Hal9 is a powerful platform for quickly building and deploying fully customizable AI chatbots, powered by your data with complete privacy. In just under 5 minutes, you can create a tailored chatbot t
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Competitor PolyAI
poly.ai
PolyAI is an enterprise voice AI company whose Agentic Dialog Platform builds, runs and refines dialog agents for customer conversations.
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Traffic estimated monthly website traffic
Monthly visits
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3.4Kvisits/mo
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MoM change
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▼ 10.9%
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6-month growth
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+60.6%
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Global rank web
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#6,156,551
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Avg. last 3 months
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3.9K
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Bounce rate lower is better
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39%
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Pages / visit
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1.1
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Visit duration
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Traffic sources
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VapiHaystackHalPolyAI
01.7K3.5K5.2K6.9KHal · 934Hal · 2.1KHal · 1.3KHal · 2.1KHal · 6.4KHal · 6.9KHal · 4.5KHal · 3.8KHal · 3.4K1001K10KHal · 934Hal · 2.1KHal · 1.3KHal · 2.1KHal · 6.4KHal · 6.9KHal · 4.5KHal · 3.8KHal · 3.4KNov '25DecJan '26FebMarAprMayJunJul
Pricing
Model
Freemium
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Freemium
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Starting price
$29per month
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$2,000per month
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Free tier
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Free trial
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API access
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Plans
No Success Package FreeCore $29/moPro $999/moPremier Custom
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Startups $2,000/mo
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Capabilities input → output
Input
AudioText
CodeDocuments
CodeText
AudioText
Output
AppsAudio
Apps
Apps
AppsAudio
Skill level
Advanced
Advanced
Intermediate
Advanced
Categories
Business & MarketingVoice & SpeechAI Call CenterAI Customer Service+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeAI Developer Tools
Business & MarketingAI Call CenterAI Customer Service
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
11
7
4
9
Agent creation
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Voice agents
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Call agents
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Call center automation
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Customer support
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APIs
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Call answering
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Chatbots
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Developer tools
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Calls
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Agents
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Chatbot building
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LLM development
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RAG
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Customer calls
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Customer support automation
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Document chat
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Agent memory
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Agent testing
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Self hosted
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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
0
Reviews
0
0
0
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.