What is AWS Amplify? A plain-English explainer

What Amplify actually gives you

Amplify has two halves that work together. The hosting half takes your frontend code (a React, Vue, Next.js or mobile app, among others) from a source repository, builds it and deploys it to a global content delivery network, with features like preview deployments for branches built in. The backend half offers ready-to-use building blocks — user sign-up and sign-in, a data API, file storage — that you add to a project through Amplify’s tooling rather than configuring the underlying services by hand.

The key thing to understand is that Amplify does not replace AWS’s core services; it orchestrates them. When you add authentication through Amplify, you are really provisioning Amazon Cognito underneath, configured for you. When you add an API or storage, Amplify is setting up the equivalent AWS services and giving you a simplified interface to work with them.

How it relates to the services beneath it

Amplify’s authentication feature is built on Amazon Cognito, which handles user sign-up, sign-in and access tokens — our what-is-amazon-cognito explainer covers what that service does on its own. Amplify’s data and API features build on managed AWS services to expose an API your frontend calls; our what-is-an-api explainer covers that general concept. Amplify’s value is not that it invents new backend capability — it is that it removes the manual configuration and wiring normally needed to combine these services into a working full-stack app.

This also means Amplify is not an all-or-nothing choice. A team can use Amplify for hosting and let it manage authentication, while still calling other AWS services directly for anything Amplify does not cover, because everything underneath remains standard AWS infrastructure.

Who Amplify is for

Amplify is aimed at developers who want a fast path to a working full-stack application on AWS without first becoming expert in every backend service involved. It suits teams building a new web or mobile app from scratch, where the priority is shipping features quickly, and where the bundled defaults for authentication, APIs and storage cover most of what the app needs.

It is less suited to teams with highly specific backend requirements that need direct, fine-grained control over the underlying services, or to existing systems that must integrate deeply with infrastructure Amplify was not designed to manage. In those cases, using the underlying AWS services directly — Cognito, an API layer, storage — offers more flexibility at the cost of more setup.

• Frontend hosting and deployment for web and mobile apps, including branch previews
• Authentication (built on Amazon Cognito)
• APIs and data access for the frontend to call
• File storage for user-uploaded content

How you pay for it, without the numbers

Amplify follows AWS’s usual consumption-based model: you pay for the hosting resources and build minutes you use, plus whatever the underlying services (Cognito, storage, and so on) charge for the capacity your app actually consumes. There is no separate flat fee for Amplify itself beyond that. Exact rates change over time, so this article deliberately does not list them — check AWS’s Amplify pricing page for current detail.

Where Amplify appears in certification study

Amplify is most relevant to AWS Certified Developer – Associate, which covers building and deploying applications on AWS and expects familiarity with services that speed up that process, including how Amplify relates to Cognito and other backend building blocks. AWS Certified Solutions Architect – Associate touches on it at a higher level, as one option among several for hosting and delivering an application.

This article covers what Amplify is and how it fits together — the deeper detail of its configuration and deployment model belongs in the syllabus itself. Our /revision study library breaks that down lesson by lesson for the certifications below.