Vapi vs LangChain vs Semantic Kernel

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

Your tool
Vapi
vs
Competitor 1
LangChain
Competitor 2
Semantic Kernel
Competitor 3
Suggested competitors for Vapi: Retell AI97% Synthflow93% ElevenLabs Conversational AI93% VVoicePod92% CloudTalk | AI Voice Agents90% Goodcall88% BlandAI88% PolyAI87%
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3 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 LangChain
langchain.com
Framework for building with large language models
Make main Remove
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.
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
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3.4Mvisits/mo
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MoM change
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▲ 0.7%
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6-month growth
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+21.0%
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Global rank web
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#13,384
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Avg. last 3 months
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3.3M
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Bounce rate lower is better
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42%
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Pages / visit
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6.2
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Visit duration
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5m 29s
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Traffic sources
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● Direct 73% · ● Referral 24%
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VapiLangChainSemantic Kernel
0850.7K1.7M2.6M3.4MLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4M1M10MLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MNov '25DecJan '26FebMarAprMayJunJul
Pricing
Model
Freemium
Freemium
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Starting price
$29per month
$39per 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
No Success Package FreeCore $29/moPro $999/moPremier Custom
Developer FreePlus $39/moEnterprise Custom/mo
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Capabilities input → output
Input
AudioText
CodeText
CodeText
Output
AppsAudio
Apps
Apps
Skill level
Advanced
Advanced
Advanced
Categories
Business & MarketingVoice & SpeechAI Call CenterAI Customer Service+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
7
6
4
Agent creation
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Agents
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LLM development
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Developer tools
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Voice agents
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Call agents
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Call center automation
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Customer calls
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Customer support
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Development
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Agent testing
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Call answering
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Calls
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 1
▲ 0
Saves
0
0
0
Reviews
0
0
0
Prompts
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.