Google App Engine vs MongoDB Stitch: What are the differences?

Developers describe Google App Engine as "Build web applications on the same scalable systems that power Google applications". Google has a reputation for highly reliable, high performance infrastructure. With App Engine you can take advantage of the 10 years of knowledge Google has in running massively scalable, performance driven systems. App Engine applications are easy to build, easy to maintain, and easy to scale as your traffic and data storage needs grow. On the other hand, MongoDB Stitch is detailed as "Backend as a Service for web and mobile applications". MongoDB Stitch lets developers focus on building applications rather than on managing data manipulation code, service integration, or backend infrastructure. Stitch lets you focus on building the app users want, not on writing boilerplate backend logic.

Google App Engine and MongoDB Stitch belong to "Platform as a Service" category of the tech stack.

Some of the features offered by Google App Engine are:

• Zero to sixty: Scale your app automatically without worrying about managing machines.
• Supercharged APIs: Supercharge your app with services such as Task Queue, XMPP, and Cloud SQL, all powered by the same infrastructure that powers the Google services you use every day.
• You're in control: Manage your application with a simple, web-based dashboard allowing you to customize your app's performance.

On the other hand, MongoDB Stitch provides the following key features:

• REST API to MongoDB Atlas
• Declarative data access controls
• Service integrations (AWS S3, Twilio...)