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Head-to-Head NPM Comparison

langchainvsllamaindex

Detailed package comparison for bundle size, weekly downloads, supply chain security, and license obligations.

Weekly Downloads Leader
langchain1.7M/wk
Security Grade Leader
Equal Rating100/100
TypeScript Ready
Both Native
Specification
langchainv1.5.19
llamaindexv0.12.1
Weekly Downloads1.7MWinner78.6K
Unpacked Size3.13 MB951.1 KB
Security Grade
A+(100/100)
A+(100/100)
Lifecycle Scripts Clean (No scripts) Clean (No scripts)
TypeScript Support Built-in Types (.d.ts) Built-in Types (.d.ts)
License TypeMITPERMISSIVEMITPERMISSIVE
Direct Dependencies48
Active Maintainers22
Last ReleaseOct 22, 2026Dec 2, 2025
Install Commandnpm i langchainnpm i llamaindex
Full Security ReportView langchain AuditView llamaindex Audit
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Frequently Asked Questions

Which package is more popular, langchain or llamaindex?
langchain is currently more popular with higher weekly downloads (1.7M/week) compared to llamaindex (78.6K/week).
Which has better supply chain security, langchain or llamaindex?
langchain has a security score of 100/100 (Grade A+), while llamaindex holds 100/100 (Grade A+). Both packages have equal security standings.
Do langchain and llamaindex provide TypeScript definitions?
langchain includes built-in TypeScript types, while llamaindex includes native TypeScript definitions.
What licenses do langchain and llamaindex use?
langchain is published under the MIT license (PERMISSIVE), and llamaindex is licensed under MIT (PERMISSIVE).