Langflow vs Stack AI vs LlamaIndex vs LangChain

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

Your tool
Langflow
vs
Competitor 1
Stack AI
Competitor 2
LlamaIndex
Competitor 3
LangChain
Compare
4 tools · best value per row highlighted
Your tool Langflow
langflow.org
Drag and drop AI
Remove
Competitor Stack AI
stack-ai.com
Connect AI models visually
Make main Remove
Competitor LlamaIndex
llamaindex.ai
Connect AI to your data
Make main Remove
Competitor LangChain
langchain.com
Framework for building with large language models
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
215.3Kvisits/mo
6.3Kvisits/mo
324Kvisits/mo
3.4Mvisits/mo
MoM change
▼ 0.7%
▼ 57.9%
▼ 21.0%
▲ 0.7%
6-month growth
-4.9%
-93.7%
-29.5%
+21.0%
Global rank web
#217,191
#1,700,092
#118,014
#13,384
Avg. last 3 months
225.2K
13.9K
398.3K
3.3M
Bounce rate lower is better
44%
39%
46%
42%
Pages / visit
2.2
1.8
2.8
6.2
Visit duration
1m 04s
14s
1m 57s
5m 29s
Traffic sources
● Direct 76% · ● Referral 24%
—
● Direct 74% · ● Referral 20%
● Direct 73% · ● Referral 24%
LangflowStack AILlamaIndexLangChain
0850.7K1.7M2.6M3.4MLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3KStack 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 · 6.3KLlamaIndex · 438.2KLlamaIndex · 470.7KLlamaIndex · 444KLlamaIndex · 423.8KLlamaIndex · 459.5KLlamaIndex · 421.3KLlamaIndex · 455KLlamaIndex · 461KLlamaIndex · 410KLlamaIndex · 324KLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4M1K10K100K1M10MLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3KStack 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 · 6.3KLlamaIndex · 438.2KLlamaIndex · 470.7KLlamaIndex · 444KLlamaIndex · 423.8KLlamaIndex · 459.5KLlamaIndex · 421.3KLlamaIndex · 455KLlamaIndex · 461KLlamaIndex · 410KLlamaIndex · 324KLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Free
Freemium
Freemium
Freemium
Starting price
Free
Free tier
Free tier
$39per month · free tier available
Free tier
Free trial
–
–
–
API access
–
Plans
—
—
Free FreeStarter Custom/moPro Custom/moEnterprise Custom/mo
Developer FreePlus $39/moEnterprise Custom/mo
Capabilities input → output
Input
Text
DataDocumentsText
DocumentsImages
CodeText
Output
Apps
Apps
DataText
Apps
Skill level
Advanced
Intermediate
Advanced
Advanced
Categories
Chatbots & CompanionsDevelopment & CodeProductivity & OfficeAI Agent+3 more
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
9
7
12
6
Agents
Agent creation
–
LLM development
–
Developer tools
–
Workflows
–
Development
–
No-code
–
–
Data extraction
–
–
–
Document data extraction
–
–
–
Document processing
–
–
–
Business automation
–
–
–
Chatbots
–
–
–
OCR
–
–
–
Process automation
–
–
–
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
▲ 0
▲ 0
▲ 1
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.