Stack AI vs ChatNode vs pgvector vs CrewAI

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

Your tool
Stack AI
vs
Competitor 1
ChatNode
Competitor 2
pgvector
Competitor 3
CrewAI
Compare
4 tools · best value per row highlighted
Your tool Stack AI
stack-ai.com
Connect AI models visually
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Competitor ChatNode
chatnode.ai
ChatNode builds AI customer service agents that handle support queries and execute actions through API calls
Make main Remove
Competitor pgvector
github.com
pgvector is an open-source extension that adds vector similarity search to Postgres.
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Competitor CrewAI
crewai.com
CrewAI is a multi-agent platform that covers the full agent lifecycle for businesses: discover what to automate, build agents, govern them in production and optimize them over time.
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Traffic estimated monthly website traffic
Monthly visits
6.3Kvisits/mo
7.9Kvisits/mo
—
476.6Kvisits/mo
MoM change
▼ 57.9%
▼ 56.0%
—
▼ 10.3%
6-month growth
-93.7%
-13.9%
—
-5.3%
Global rank web
#1,700,092
#1,061,283
—
#107,487
Avg. last 3 months
13.9K
12.2K
—
564.3K
Bounce rate lower is better
39%
39%
—
46%
Pages / visit
1.8
4.9
—
2.6
Visit duration
14s
2m 20s
—
1m 32s
Traffic sources
—
● Direct 97% · ● Mail 3%
—
● Direct 75% · ● Referral 23%
Stack AIChatNodepgvectorCrewAI
0171.3K342.6K513.9K685.2KStack 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 · 6.3KChatNode · 11.7KChatNode · 6.7KChatNode · 10KChatNode · 9.2KChatNode · 4.6KChatNode · 10.4KChatNode · 10.6KChatNode · 18KChatNode · 7.9KCrewAI · 408.9KCrewAI · 417.1KCrewAI · 521.4KCrewAI · 503.5KCrewAI · 610.1KCrewAI · 646.1KCrewAI · 685.2KCrewAI · 531.1KCrewAI · 476.6K1K10K100K1MStack 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 · 6.3KChatNode · 11.7KChatNode · 6.7KChatNode · 10KChatNode · 9.2KChatNode · 4.6KChatNode · 10.4KChatNode · 10.6KChatNode · 18KChatNode · 7.9KCrewAI · 408.9KCrewAI · 417.1KCrewAI · 521.4KCrewAI · 503.5KCrewAI · 610.1KCrewAI · 646.1KCrewAI · 685.2KCrewAI · 531.1KCrewAI · 476.6KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Free Trial
Free
Free
Starting price
Free tier
$35per month
Free
Free
Free tier
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Free trial
–
–
API access
–
Plans
—
Lite $35/moStandard $89/moScale $377/moEnterprise Custom
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Basic FreeEnterprise $0
Capabilities input → output
Input
DataDocumentsText
DocumentsTextWeb pages
Data
Text
Output
Apps
Apps
Data
AppsCode
Skill level
Intermediate
Intermediate
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Business & MarketingChatbots & CompanionsProductivity & OfficeAI Agent+2 more
Development & CodeAI Developer Tools
Development & CodeProductivity & OfficeAI AgentAI Developer Tools+2 more
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
7
9
7
9
Agents
–
Agent creation
–
–
No-code
–
–
Workflows
–
–
Developer tools
–
–
Agent collaboration
–
–
–
Customer support
–
–
–
Customer support chatbot
–
–
–
Vector databases
–
–
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Vector indexes
–
–
–
Agent management
–
–
–
Business automation
–
–
–
Chatbots
–
–
–
Customer support automation
–
–
–
Knowledge bases
–
–
–
PostgreSQL assistance
–
–
–
Process automation
–
–
–
Website to chatbot
–
–
–
Agent testing
–
–
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Chatbot building
–
–
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Chatbot integration
–
–
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Development
–
–
–
Finance workflow automation
–
–
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RAG
–
–
–
SQL
–
–
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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
▲ 0
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
0
Verified listing
–
–
–
–

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.