Comparison guide
Langchain vs Llamaindex
Side-by-side NPM package comparison

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llamaindex
<p align="center"> <img height="100" width="100" alt="LlamaIndex logo" src="https://ts.llamaindex.ai/square.svg" /> </p> <h1 align="center">LlamaIndex.TS</h1> <h3 align="center"> Data framework for your LLM application. </h3>
Downloads unavailable · 2.6 MB gzip · Health 49/100
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Choosing between Langchain and Llamaindex? Here's a data-driven comparison based on real npm data — downloads, bundle size, health scores, and more — to help you decide which package fits your project best.
Downloads & Popularity
Weekly download data is unavailable for Langchain. Weekly download data is unavailable for Llamaindex. Missing data is not zero downloads. We cannot compare download activity until all counts are available.
Bundle Size
Langchain has the smallest gzipped bundle at 119.5 KB. Llamaindex comes in at 2.6 MB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Health Score Comparison
Langchain has an overall health score of 67/100 (good), with strong maintenance, security scores. Llamaindex has an overall health score of 49/100 (moderate), with strong security scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics. Download data is incomplete; these composite scores include a fallback popularity input and should not determine an overall winner.
When to Choose Each
Choose Langchain if you value actively maintained, strong security track record. Choose Llamaindex if you value strong security track record.
Our Verdict
Download data is incomplete for this comparison of Langchain and Llamaindex. We are not selecting an overall winner from incomplete metrics. Compare the available bundle, maintenance, and quality information against your project's requirements.
Frequently Asked Questions
- Is langchain better than llamaindex?
- It depends on your needs. Langchain has a health score of 67/100 while Llamaindex scores 49/100. Weekly download data is incomplete, so no popularity ranking is available. Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
- Which has a smaller bundle size, langchain or llamaindex?
- Langchain has the smaller gzipped bundle at 119.5 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use langchain vs llamaindex?
- Weekly download data is incomplete, so no popularity ranking is available. Download counts reflect package installations, not unique developers.
- Which is better maintained, langchain or llamaindex?
- Langchain has a maintenance score of 100/100. Langchain scores 100/100 and Llamaindex scores 40/100 on maintenance.
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