Langchain vs Mastra

Downloads & Popularity

Langchain leads with 1.8M weekly downloads — roughly 9.9x more. Mastra has 181.4K weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.

Bundle Size

Langchain has the smallest gzipped bundle at 2.9 KB. Mastra comes in at 5.2 MB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.

Health Score Comparison

Mastra has an overall health score of 88/100 (very good), with strong maintenance, quality, security, popularity scores. Langchain has an overall health score of 85/100 (very good), with strong maintenance, security, popularity scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.

When to Choose Each

Choose Langchain if you value large community support, minimal bundle footprint, actively maintained, strong security track record. Choose Mastra if you value actively maintained, strong security track record.

Frequently Asked Questions

Is langchain better than mastra?

It depends on your needs. Langchain has a health score of 85/100 while Mastra scores 88/100. Langchain has more weekly downloads (1.8M), suggesting broader adoption. 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 mastra?

Langchain has the smaller gzipped bundle at 2.9 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 mastra?

Based on npm download statistics, Langchain has approximately 1.8M weekly downloads and Mastra has approximately 181.4K weekly downloads. These numbers reflect package installations, not unique developers, but they indicate relative adoption levels.

Which is better maintained, langchain or mastra?

Mastra currently has the higher overall health score at 88/100. Langchain has a maintenance score of 100/100 and Mastra scores 100/100 on maintenance.