What Is RAD Studio and What Can You Build With It?

RAD Studio is Embarcadero's integrated development environment (IDE) for rapidly building high-performance, platform-native applications for Windows, Linux, iOS, macOS, and Android from a single codebase. It suits teams that want one toolchain covering desktop, mobile, and server work, and it bundles Delphi, C++Builder, InterBase, RAD Server, and Python integration libraries. If you only write in one language or target one platform, buying a single product such as Delphi or C++Builder may be enough; choose RAD Studio when you need the combined toolset.

What RAD Studio includes

RAD Studio is a suite, not a single compiler. The page lists these components:

The current release named on the site is RAD Studio 13.2 Florence.

What you can build

Because the suite targets Windows, Linux, iOS, macOS, and Android from one codebase, the same project structure can serve:

• Desktop applications — native Windows and macOS apps built with visual designers.
• Mobile apps — iOS and Android deployments from the same source.
• Linux applications — native Linux targets are listed among supported platforms.
• Database-backed apps — InterBase can be embedded directly in mobile and desktop applications, so the app ships with its own database rather than requiring a separate server.
• API and backend services — RAD Server generates database APIs in Delphi and C++Builder and can run on-premise or in the cloud.
• Web front ends — WebStencils lets you build web UIs from standard HTML files and merge them with server-side business logic, without committing to a JavaScript framework.

How the rapid development workflow works

RAD Studio's model is visual and compiled: you lay out forms and controls in a designer, attach code to them, and compile to native binaries for each target platform. The "single codebase" claim means platform-specific builds come from shared source rather than separate projects per platform. For example, a team building an inventory app could design one set of screens, compile a Windows desktop build for warehouse staff and an Android build for handheld scanners, and connect both to an InterBase database embedded in the app or exposed through a RAD Server API.

The Kai AI add-on

Kai is a premium add-on for RAD Studio, Delphi, and C++Builder — it is not part of the base suite. Embarcadero describes it as an agentic AI platform that generates code and UIs, compiles projects, resolves errors, and executes tasks through MCP-powered workflows. It uses a bring-your-own-key (BYOK) model supporting major LLMs, so you control performance, cost, and data privacy through your own provider account. Budget for it separately if you want AI assistance in the IDE.

RAD Studio vs. Delphi or C++Builder alone

The distinction is scope, not capability:

• Delphi alone gives you the Delphi language and its visual tools across the same five platforms. Choose it if your team works in Delphi/Object Pascal.
• C++Builder alone is positioned for high-performance Windows applications in modern C++. Choose it if your codebase is C++ and Windows is the priority.
• RAD Studio combines both languages plus InterBase, RAD Server, and Python integration in one purchase. Choose it when a team mixes Delphi and C++, needs the bundled database and API server, or wants room to move between languages without buying separate products.

Deciding whether to try it

The site offers "Try Now" links for RAD Studio and for each individual product, so you can evaluate the suite or a single tool before committing. Pricing is not stated on the page — "buy now" and "upgrade" options exist, but you need to check the store for current editions and costs rather than assuming any tier is free. A practical path: start a trial, build one small app that targets two platforms you actually need (for example Windows and Android), and confirm the visual designer, compiler, and any database or API components fit your workflow before choosing between the suite and a single product.