Dify vs Vapi vs Stack AI

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

Your tool
Dify
vs
Competitor 1
Vapi
Competitor 2
Stack AI
Competitor 3
Suggested competitors for Dify: Flowise88% Langflow86% FastGPT85% Voiceflow82% Botpress80% Rivet79% Chatbase78% Kuberns78%
Compare
3 tools · best value per row highlighted
Your tool Dify
dify.ai
AI apps without code
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Competitor 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 Stack AI
stack-ai.com
Connect AI models visually
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Traffic estimated monthly website traffic
Monthly visits
1Mvisits/mo
—
6.3Kvisits/mo
MoM change
▼ 16.6%
—
▼ 57.9%
6-month growth
-30.6%
—
-93.7%
Global rank web
#39,510
—
#1,700,092
Avg. last 3 months
1.1M
—
13.9K
Bounce rate lower is better
41%
—
39%
Pages / visit
4.4
—
1.8
Visit duration
6m 40s
—
14s
Traffic sources
● Direct 84% · ● Referral 15%
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—
DifyVapiStack AI
0368.2K736.4K1.1M1.5MDify · 1.1MDify · 1.2MDify · 1.3MDify · 1.1MDify · 1.5MDify · 1.2MDify · 1.1MDify · 1.2MDify · 1.2MDify · 1MStack 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 · 6.3K1K10K100K1M10MDify · 1.1MDify · 1.2MDify · 1.3MDify · 1.1MDify · 1.5MDify · 1.2MDify · 1.1MDify · 1.2MDify · 1.2MDify · 1MStack 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 · 6.3KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
Starting price
$590per month · free tier available
$29per month
Free tier
Free tier
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Free trial
–
API access
Plans
Sandbox FreeProfessional $590/yrTeam $1,590/yrEnterprise Custom
No Success Package FreeCore $29/moPro $999/moPremier Custom
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Capabilities input → output
Input
DocumentsText
AudioText
DataDocumentsText
Output
Apps
AppsAudio
Apps
Skill level
Intermediate
Advanced
Intermediate
Categories
Chatbots & CompanionsDevelopment & CodeProductivity & OfficeAI Agent+4 more
Business & MarketingVoice & SpeechAI Call CenterAI Customer Service+1 more
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
9
7
5
Agents
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No-code
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Workflows
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Agent creation
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Voice agents
–
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Call agents
–
–
Call center automation
–
–
Chatbots
–
–
Customer calls
–
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Customer support
–
–
Developer tools
–
–
LLM development
–
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Call answering
–
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Calls
–
–
Development
–
–
Finance workflow automation
–
–
Productivity
–
–
Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 0
▲ 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.