Knex.js is a popular query builder for Node.js that supports multiple SQL dialects, including PostgreSQL. It provides an intuitive interface for building database queries without requiring the use of classes or abstracting away the underlying SQL syntax. Knex works seamlessly with YugabyteDB, a distributed SQL database built on PostgreSQL, making it an ideal choice for developers looking to scale their data layer. The library offers numerous benefits, including improved developer productivity, reduced errors, and enhanced application performance. Its simplicity and flexibility make it a great alternative to Object-Relational Mappers (ORMs) like Sequelize, TypeORM, and Prisma.