What are the key differences between MERN, MEVN, and PERN stacks—and under what conditions is MERN the best fit?

Explains how React, Vue, and relational vs NoSQL choices influence stack selection and use cases.

• MERN uses React, MEVN uses Vue, and PERN replaces MongoDB with PostgreSQL. • MERN is ideal when you need a robust React ecosystem, React Native compatibility, and broad developer availability. • MEVN fits lightweight, rapid prototyping; PERN suits apps that require relational consistency and structured schemas. Tags: mern-stack, mevn-stack, pern-stack, javascript, react, vue, full-stack