Stack AI vs Dify vs Voiceflow vs Weaviate

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

Your tool
Stack AI
vs
Competitor 1
Dify
Competitor 2
Voiceflow
Competitor 3
Weaviate
Compare
4 tools · best value per row highlighted
Your tool Stack AI
stack-ai.com
Connect AI models visually
Remove
Competitor Dify
dify.ai
AI apps without code
Make main Remove
Competitor Voiceflow
voiceflow.com
Design conversations visually
Make main Remove
Competitor Weaviate
weaviate.io
Search that understands meaning
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
6.3Kvisits/mo
1Mvisits/mo
385Kvisits/mo
154.2Kvisits/mo
MoM change
▼ 57.9%
▼ 16.6%
▼ 5.8%
▼ 11.8%
6-month growth
-93.7%
-30.6%
-35.3%
-7.0%
Global rank web
#1,700,092
#39,510
#93,201
#293,589
Avg. last 3 months
13.9K
1.1M
407.5K
155.7K
Bounce rate lower is better
39%
41%
38%
41%
Pages / visit
1.8
4.4
5.2
1.9
Visit duration
14s
6m 40s
3m 07s
50s
Traffic sources
—
● Direct 84% · ● Referral 15%
● Direct 75% · ● Referral 24%
● Direct 82% · ● Referral 18%
Stack AIDifyVoiceflowWeaviate
0368.2K736.4K1.1M1.5MStack 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 · 6.3KDify · 1.1MDify · 1.2MDify · 1.3MDify · 1.1MDify · 1.5MDify · 1.2MDify · 1.1MDify · 1.2MDify · 1.2MDify · 1MVoiceflow · 600.1KVoiceflow · 574.1KVoiceflow · 561.6KVoiceflow · 513.7KVoiceflow · 594.8KVoiceflow · 462.6KVoiceflow · 454KVoiceflow · 429.1KVoiceflow · 408.5KVoiceflow · 385KWeaviate · 226KWeaviate · 193.3KWeaviate · 188.9KWeaviate · 165.9KWeaviate · 184.5KWeaviate · 169.2KWeaviate · 137.9KWeaviate · 174.8KWeaviate · 154.2K1K10K100K1M10MStack 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 · 6.3KDify · 1.1MDify · 1.2MDify · 1.3MDify · 1.1MDify · 1.5MDify · 1.2MDify · 1.1MDify · 1.2MDify · 1.2MDify · 1MVoiceflow · 600.1KVoiceflow · 574.1KVoiceflow · 561.6KVoiceflow · 513.7KVoiceflow · 594.8KVoiceflow · 462.6KVoiceflow · 454KVoiceflow · 429.1KVoiceflow · 408.5KVoiceflow · 385KWeaviate · 226KWeaviate · 193.3KWeaviate · 188.9KWeaviate · 165.9KWeaviate · 184.5KWeaviate · 169.2KWeaviate · 137.9KWeaviate · 174.8KWeaviate · 154.2KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
Freemium
Starting price
Free tier
$590per month · free tier available
Free tier
$45per month · free tier available
Free tier
Free trial
–
–
API access
Plans
—
Sandbox FreeProfessional $590/yrTeam $1,590/yrEnterprise Custom
—
Free FreeFlex $45/moPremium $0
Capabilities input → output
Input
DataDocumentsText
DocumentsText
DocumentsText
DataImagesText
Output
Apps
Apps
Apps
Data
Skill level
Intermediate
Intermediate
Intermediate
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Chatbots & CompanionsDevelopment & CodeProductivity & OfficeAI Agent+4 more
Business & MarketingChatbots & CompanionsProductivity & OfficeAI Agent+3 more
Development & CodeAI Developer Tools
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
5
9
13
6
Agents
–
Agent creation
–
No-code
–
Workflows
–
–
Chatbots
–
–
Developer tools
–
–
LLM development
–
–
Customer support
–
–
–
Customer support chatbot
–
–
–
Vector databases
–
–
–
Voice agents
–
–
–
Call agents
–
–
–
Call center automation
–
–
–
Calls
–
–
–
Chatbot building
–
–
–
Databases
–
–
–
APIs
–
–
–
Call answering
–
–
–
Development
–
–
–
Finance workflow automation
–
–
–
Information retrieval
–
–
–
Productivity
–
–
–
Website to chatbot
–
–
–
Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 1
▲ 1
▲ 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.