What Are the Advantages of Swift Over Other Programming Languages?

In this post, we will compare Swift with some other popular programming lan­guages. This will give you a better idea of where the language fits in the ecosystem as well as its advantages and disadvantages for your use case.

This will also be useful for those who are trying to build a learning path of multiple languages, in which Swift is merely one of the target languages.

The language comparisons ahead are targeted to readers with programming back­grounds in other languages. If you are new to programming and don’t understand some of the terms, don’t be disheartened. It is definitely not a prerequisite to know all of these concepts and understand the terminology in advance. Quite the contrary: You are here to learn!

Python

Python is a high-level, interpreted, cross-platform language known for its simplicity. It was created by Guido van Rossum in 1991 and is accepted as one of the most beginner-friendly languages. It is a dynamically typed language supporting multiple program­ming paradigms, like object-oriented, functional, and procedural programming. Some use cases for Python include web development, data science, machine learning, script­ing, and fintech. It has a huge community and rich set of libraries ready to tackle most high-level tasks.

Swift is a statically typed language, meaning that you have to determine the type of each variable in advance most of the time. Python instead is a dynamically typed language; that is, the types of variables are determined during runtime based on the values assigned to them. Although type hints are available, they don’t enforce type checking during runtime.

Whether dynamic typing is a strength or weakness depends on the use case. It allows more flexibility and rapid development, but if you aren’t careful, you’ll get errors during runtime instead of compile time, which is bad for your production system. Using type check libraries or unit tests is essential to guard against that risk.

On the other hand, the static typing of Swift makes it easier to catch some simple (but fatal) errors during compilation. That helps with building more robust applications—but at the cost of slower development and reduced flexibility.

Performance is another significant difference. As a compiled language, Swift code is expected to run much faster than interpreted Python code. But don’t let that statement fool you: You’ll need to have CPU-heavy computations to feel the difference. In a sim­ple, everyday application, Python may not feel slow at all: quite the contrary! Comput­ers tend to be very fast nowadays, and even unoptimized systems seem to perform well—assuming you aren’t pushing their limits.

Besides, although the interpreted nature of Python comes with a performance penalty, it pays off in some other ways:

• The source code of each application is open and transparent; there are no hidden sur­prises.
• Code on the production system can be debugged directly.
• In emergencies, quick fixes can be applied by simply changing the code on the pro­duction system.
• Interactive execution enables you to use tools like Jupyter Notebook, in which code can be executed line by line.

Both Swift and Python are easy to learn languages with a simple and readable syntax for any English speaker. However, dynamic typing, a reduced number of syntax arti­facts, and its lack of compilation make Python code a little more approachable for com­plete beginners.

A big advantage of Python over Swift is its cross-platform nature. If you aren’t relying on external compiled libraries and have followed best practices, then a pure Python project can simply be copied and pasted to any OS (with Python installed) and executed directly.

Java

Java is a high-level, object-oriented, and cross-platform language developed by Sun Microsystems in 1995. Java follows the “write once, run anywhere” philosophy, mean­ing that Java code can run on any platform with a Java Virtual Machine (JVM). Some use cases include enterprise applications, backend development, web development, and financial and banking applications.

The most significant difference between these languages is the way they compile. On an Apple device, Swift code is compiled directly to native machine code, which trans­lates into a very fast application. In a Java environment, however, code is compiled to bytecode, which runs on the intermediary JVM platform preinstalled on the target machine. That may require more preparation and possible license considerations on the target platform.

The native nature of its compiled code leads to a performance advantage for Swift in some cases—but Java applications are not slow by any means. The difference may be tangible for heavy calculations, though.

In terms of syntax, Swift is a clean and brief language in which syntax clutter is mostly avoided. In Java, a higher degree of clutter is arguably present.

Like Python, Java has the undisputed advantage of being a cross-platform language. A pure Java application is compiled once and can be executed on any OS with Java sup­port. However, JVM version differences can be a source of headaches. Managing multi­ple JVM versions and handling corresponding environment variables for different Java apps may not be your favorite part of the Java deployment process.

C#

C# arguably started as Microsoft’s take on Java, but it has improved over time. It was published in 2000 as part of the .NET framework. Some typical use cases include desk­top applications, web backends, and game development targeting the Unity engine.

The comparison between Swift and C# is very similar to the comparison between Swift and Java as C# is largely inspired by Java in the first place. Overlooking their syntax dif­ferences, C# is a similar technology that runs on the .NET runtime instead of JVM. Due to this similarity, we won’t duplicate the Java comparison information here.

JavaScript

JavaScript—not to be confused with Java—is a high-level, interpreted programming language that is arguably the backbone of web development. It was created by Brendan Eich in 1995 and is the standard language for use with web browsers, enabling interac­tive and dynamic websites. That being said, it outgrew that initial purpose over the years, broadening its usage to areas like backend servers and cross-platform mobile and desktop apps.

Like Python, JavaScript is a dynamically typed language—and this feature offers the same advantages and disadvantages to the language. In terms of execution, JavaScript is similar to Python once again; it is an interpreted language, which offers some advan­tages at the cost of performance.

One of the key differences between Swift and JavaScript is in their reusability. As a devel­oper, it is natural to target the highest return on your time investment while learning a new technology. The scope of Swift is more or less defined within the Apple ecosystem, whereas JavaScript has a much broader scope—for example:

• Frontend development using vanilla JavaScript or certain frameworks
• Backend development using frameworks like Node.js
• Cross-platform desktop development using frameworks like Electron
• Cross-platform mobile development using frameworks like React Native

This doesn’t mean that JavaScript is the best choice for any given development task; like any other choice, picking JavaScript for a certain task will surely have advantages and disadvantages. However, the wide horizon of its applicability makes it an attractive choice for developers considering shipping a cross-platform application with a single code base.

Dart

Dart is a modern, object-oriented language released by Google in 2011. It is best known for powering Flutter, which is Google’s cross-platform framework for mobile, web, and desktop applications.

Swift and Dart offer similar features and a modern syntax. Swift is invented and sup­ported by Apple, and its main purpose is app development for Apple devices, whereas Dart is invented and supported by Google. Its main purpose is to power Flutter, which is a cross-platform UI framework for building natively compiled applications for vari­ous targets, like iOS, Android, web, Windows, macOS, and Linux.

In that regard, Dart in combination with Flutter offers an alternative for cross-platform development similar to JavaScript in combination with React Native. You get to have a single codebase that can be published in distinct apps for each target platform.

Kotlin

Kotlin is a modern, statically typed programming language developed by JetBrains in 2011, arguably as an effort to improve some shortcomings of Java for Android develop­ment. It is fully interoperable with Java and designed to be concise and expressive, reducing boilerplate code and enhancing productivity. Today, it is fully supported by Google for Android development.

First and foremost, Swift and Kotlin were born with similar stories but targeted differ­ent purposes. Swift was born as a modernized replacement of Objective-C for Apple platforms, whereas Kotlin was born as a modernized replacement of Java for Android platforms.

This similarity and contrast between Swift and Kotlin is reflected in their features as well. For instance, Swift can interoperate with legacy Objective-C code, while Kotlin can interoperate with legacy Java code.

With the rise of Kotlin Native, though, Kotlin became a player in the cross-platform development game too. Beyond those core differences, both are modern languages with expressive syntax.

C++

C++ is a high-performance, object-oriented programming language developed by BjarneStroustrup in 1985 as an extension of C. It enables programmers to work close to the hardware via low-level memory control. It is widely used for system programming, game development, and high-performance computing.

First and foremost, Swift provides a high level of abstraction. It acts like an intermediary layer between the hardware and the programmer, enabling the programmer to focus on their algorithms instead of orchestration of the underlying hardware elements. C++, meanwhile, is a lower-level language, which enables a higher degree of hardware manipulation.

This makes C++ an attractive choice for low-level frameworks in which performance is the top priority, such as game engines, system programming, operating systems, and such.

However, such power comes at the cost of safety risks. The requirement of manual memory management in C++ has been the source of countless application crashes and security risks in the history of computing—simply because programmers are human and make mistakes.

Another significant difference is the syntax. Swift is a young language built from the ground up for the modern programmer of our age, which translates into a clean and approachable syntax. C++, on the other hand, is an old language that has evolved over the years, adding new elements as the need emerged. Its syntax is very complex and probably scary for many beginners.

Rust

Rust is a high-performance, system-level programming language developed by Mozilla and initially released in 2010. It was arguably invented to overcome some shortcomings of C/C++, providing an alternative with similar performance plus increased safety and readability.

Memory safety is one of the main reasons that Rust emerged: to solve the issues of C++ highlighted earlier. Rust uses a system of ownership and borrowing and life­times to ensure memory safety without a garbage collector, whereas Swift uses a sys­tem called Automatic Reference Counting (ARC) to manage memory automatically—meaning that developers don’t need to manage object lifetimes manually.

Swift and Rust were born with different purposes in mind. The main focus of Swift is application development on consumer devices (with an imprint of a certain fruit). Rust, meanwhile, is a system-level language like C/C++, providing a closer relationship with the hardware. Even WebAssembly development is possible with Rust.

The raw power of Rust comes at the cost of a steeper learning curve. The syntax of the language is certainly much more approachable than C++, but still, programmers need to understand many low-level concepts before developing competent, robust applica­tions. Swift instead offers a lower entry barrier and an easier jump start.

Picking the Ideal Language

If you are trying to decide between Swift and another language for your software proj­ect, there are naturally many factors to consider. This post offers some thoughts to point you in the right direction.

If you are targeting Apple devices, Swift is the natural choice for native development. It ensures the best performance and reliability in most cases, and you get access to the full power of the device plus the earliest access to new features. In addition, the footprint of your app will be minimal.

If you are targeting multiple platforms, there are two typical approaches.

Native

With the native approach, you can use a native language for each platform. For instance, you can use Swift for Apple development and Kotlin for Android develop­ment. That brings the advantages of native development to the table, but your devel­opment time and maintenance costs will probably increase because you’ll have to build and manage different codebases for different target platforms.

Cross-Platform

With the cross-platform approach, you can use an OS-independent platform to build your app—like React Native, Electron, Tauri, or Flutter. In that case, you most likely won’t need to handwrite much Swift code; most of the development will be in a mid­dle ground language like JavaScript. That brings the advantage of reduced develop­ment costs and complexity, but you’ll have to endure performance overhead, a larger app size, limited access to native features, and an unavoidable vendor lock-in. It is also not uncommon to find yourself in a desperate situation if the app on the device spits out an error rooted in the cross-platform framework; those errors may be hard to solve without vendor support and can cause delays.

For projects without an Apple focus, Swift won’t be the first choice of the typical pro­grammer. If you are stepping outside of Apple’s ecosystem, you’ll probably find lan­guages with more mature and vibrant communities, resources, and readily available libraries targeting your task at hand.

For the lowest level of development, such as embedded or kernel programming, the lowest-level programming languages would be preferred over others anyway—such as C, C++, Rust, or even Assembly.

There may be some other, more powerful factors affecting your language choice; for example, the experience of the development team at hand or the availability of ready-to-use libraries on a certain platform might be leading factors of your decision. For instance, Python is one of the exclusive choices for machine learning due to the high availability of libraries and resources on that topic.

Tip: Avoid Tech Fanaticism

We recommend being careful to avoid fanaticism. Some communities can be very vocal about their technological choices, creating an impression of universal superiority.

However, forks, spoons, and knives were invented for different purposes, and they reside peacefully on the same table. The same applies to development technologies such as programming languages. There are good and not-so-good use cases for each language; no programming language can do everything equally well.

A healthy approach is to understand the strengths and weakness of each option and to pick the best tool accordingly. It doesn’t make sense to use a fork to eat soup, right?

Conclusion

Swift is the clear choice for native Apple development, but as these comparisons show, every language earns its place by solving different problems. Python dominates data science, JavaScript rules the web, Kotlin mirrors Swift's role on Android, and C++ and Rust handle performance-critical low-level work. Rather than searching for a universally superior language, weigh your target platform, your team's experience, and the available libraries, then pick the right tool for the job.

Editor’s note: This post has been adapted from a section of the book Swift: The Practical Guide by Kerem Koseoglu. Dr. Koseoglu is a seasoned software engineer, author, and educator with extensive experience in global software development projects. In addition to his expertise in ABAP, he is also proficient in database-driven development using Python and Swift. He is the author of Design Patterns in ABAP Objects (SAP PRESS), as well as several best-selling technical books in Turkey. He has a Ph.D. in organizational behavior.

This post was originally published 7/2026.