How much does MERN real-time app development cost?

A focused MERN real-time feature added to an existing MERN app costs $8,000 to $20,000. A complete real-time MERN web app built from scratch runs $25,000 to $70,000 depending on complexity, concurrent user targets, and persistence requirements. Our MERN developers start at $22/hr. See our full MERN development cost breakdown.