Stack AI vs LangChain vs Langflow vs LlamaIndex

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

Your tool
Stack AI
vs
Competitor 1
LangChain
Competitor 2
Langflow
Competitor 3
LlamaIndex
Compare
4 tools · best value per row highlighted
Your tool Stack AI
stack-ai.com
Connect AI models visually
Remove
Competitor LangChain
langchain.com
Framework for building with large language models
Make main Remove
Competitor Langflow
langflow.org
Drag and drop AI
Make main Remove
Competitor LlamaIndex
llamaindex.ai
Connect AI to your data
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
6.3Kvisits/mo
3.4Mvisits/mo
215.3Kvisits/mo
324Kvisits/mo
MoM change
▼ 57.9%
▲ 0.7%
▼ 0.7%
▼ 21.0%
6-month growth
-93.7%
+21.0%
-4.9%
-29.5%
Global rank web
#1,700,092
#13,384
#217,191
#118,014
Avg. last 3 months
13.9K
3.3M
225.2K
398.3K
Bounce rate lower is better
39%
42%
44%
46%
Pages / visit
1.8
6.2
2.2
2.8
Visit duration
14s
5m 29s
1m 04s
1m 57s
Traffic sources
—
● Direct 73% · ● Referral 24%
● Direct 76% · ● Referral 24%
● Direct 74% · ● Referral 20%
Stack AILangChainLangflowLlamaIndex
0850.7K1.7M2.6M3.4MStack 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 · 6.3KLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3KLlamaIndex · 438.2KLlamaIndex · 470.7KLlamaIndex · 444KLlamaIndex · 423.8KLlamaIndex · 459.5KLlamaIndex · 421.3KLlamaIndex · 455KLlamaIndex · 461KLlamaIndex · 410KLlamaIndex · 324K1K10K100K1M10MStack 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 · 6.3KLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3KLlamaIndex · 438.2KLlamaIndex · 470.7KLlamaIndex · 444KLlamaIndex · 423.8KLlamaIndex · 459.5KLlamaIndex · 421.3KLlamaIndex · 455KLlamaIndex · 461KLlamaIndex · 410KLlamaIndex · 324KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Free
Freemium
Starting price
Free tier
$39per month · free tier available
Free
Free tier
Free tier
Free trial
–
–
–
API access
–
Plans
—
Developer FreePlus $39/moEnterprise Custom/mo
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Free FreeStarter Custom/moPro Custom/moEnterprise Custom/mo
Capabilities input → output
Input
DataDocumentsText
CodeText
Text
DocumentsImages
Output
Apps
Apps
Apps
DataText
Skill level
Intermediate
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Chatbots & CompanionsDevelopment & CodeProductivity & OfficeAI Agent+3 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools+1 more
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
5
6
9
12
Agents
Agent creation
–
LLM development
–
Developer tools
–
Workflows
–
Development
–
No-code
–
–
Data extraction
–
–
–
Document data extraction
–
–
–
Document processing
–
–
–
Chatbots
–
–
–
OCR
–
–
–
Text extraction
–
–
–
APIs
–
–
–
Agent testing
–
–
–
Finance workflow automation
–
–
–
Information retrieval
–
–
–
Medical data extraction
–
–
–
Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 1
▲ 0
▲ 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.