.NET MAUI vs. Kotlin MTP for App Development: Which Cross-Platform Framework is Right for Your Business?

McKinsey’s 2025 analysis of CIO budgets in the AI era shows that companies generating the highest returns from technology spending are those that make deliberate decisions about which platforms and applications to keep, scale, modernize, or retire. Choosing a framework for cross-platform app development is exactly this kind of strategic decision.

When a team commits to .NET MAUI or Kotlin Multiplatform, it also commits to a specific vendor ecosystem, programming language, and long-term maintenance model. The longer the framework remains in use, the more expensive and complex it becomes to change direction and migrate your code base.

This choice has become even more important in 2026 than it was just a few years ago. Microsoft ended Xamarin support in May 2024, pushing legacy Xamarin teams to select a modern alternative. For many businesses, the choice stands with .NET MAUI, the direct successor of Xamarin. At the same time, JetBrains moved Kotlin Multiplatform to Stable in November 2023 and addressed one of the main concerns CTOs previously had about its maturity.

Today, both .NET MAUI and Kotlin Multiplatform are production-ready frameworks that allow teams to build applications for iOS, Android, and other platforms from a shared codebase.

In this article, we define both technologies and compare them across ten key parameters that influence real business decisions.

NET MAUI, short for Multi-platform App UI, is Microsoft’s open-source framework for building native applications for iOS, Android, macOS, and Windows using a single C# and XAML codebase. Released in 2022 as the successor to Xamarin.Forms, it is now Microsoft’s primary framework for cross-platform mobile and desktop app development.

.NET MAUI allows teams to share both business logic and user interface code across platforms. Developers define the interface once using XAML, and the framework renders it as native controls on each operating system. When an application requires platform-specific functionality, teams can still access native APIs directly.

For companies already invested in the .NET ecosystem, .NET MAUI can also be combined with Blazor to extend the same development approach across mobile, desktop, and web applications.

Although the framework faced reliability concerns after its initial release in 2022, many of these issues have been addressed in later versions. .NET MAUI became more stable with .NET 8 and .NET 9, while .NET 10, released in 2025, introduced additional performance and tooling improvements for cross-platform app development.

Adoption is also growing. According to Microsoft, the number of cross-platform apps built with .NET MAUI on the Google Play Store has more than doubled over the past year. The Stack Overflow Developer Survey 2024 also shows .NET MAUI at 3.1% developer usage, with 53.1% wanting to use it in the upcoming year. This is more than double that of Xamarin, which is still planned to be used by 20,1% of developers. The numbers suggest that migration from Xamarin to .NET MAUI is already well underway.

Kotlin Multiplatform, or KMP, is JetBrains’ open-source technology for sharing Kotlin code across iOS, Android, web, desktop, and server applications. Unlike .NET MAUI, KMP focuses mainly on sharing business logic and underlying libraries while allowing each platform to keep its native UI layer. This means that iOS applications can use SwiftUI or UIKit, Android applications can use Jetpack Compose, and the shared business logic is written once in Kotlin.

This architectural difference is important for companies choosing a cross-platform framework. Kotlin Multiplatform is a strong fit when users expect a fully native look and feel, and when the business cannot afford an additional UI translation layer between the codebase and the platform’s native controls.

For teams that also want to share UI code, JetBrains offers Compose Multiplatform as an optional layer on top of KMP. Since September 2025, Compose Multiplatform has been considered stable for both Android and iOS, making it a strong choice for building mobile UIs in KMP projects where a native look and feel is not a top priority.

Kotlin Multiplatform also extends beyond mobile development. Teams can use the same Kotlin codebase to target a JVM back end, web applications through Kotlin/JS or Kotlin/Wasm, and native desktop applications. This makes KMP especially relevant for companies that already use Kotlin or JVM technologies on the back end and want to avoid duplicating domain logic across server and client applications.

In 2026, Kotlin Multiplatform is production-ready. Its Stable release introduced a stabilized API, simpler project configuration, improved Swift and Objective-C interoperability, and faster build times. These improvements narrowed the gap between what early adopters had already been using in production and what JetBrains officially supported.

For a Kotlin Multiplatform example at production scale, JetBrains maintains a case studies page covering deployments at Netflix, McDonald’s, Forbes, Philips, Cash App, and others. These examples show that the shared-logic and native-UI model has already been used in large customer-facing applications for years.

Both .NET MAUI and Kotlin Multiplatform are capable of shipping a working cross-platform application. The harder question is which one fits your team, product roadmap, and existing technology investments. The comparison below covers ten parameters that influence real business decisions, and each one ends with a short bottom line that summarizes the practical implications.

.NET MAUI is part of the broader .NET ecosystem, which Microsoft maintains through a published long-term support cadence. LTS versions, including .NET 8 and .NET 10, receive three years of free support, and .NET MAUI follows this release cycle.

Xamarin’s retirement is the closest example of how Microsoft handles cross-platform development technologies. Instead of leaving the category, Microsoft consolidated Xamarin into .NET MAUI. This suggests a degree of platform continuity, even when product names and implementation details change.

Kotlin Multiplatform is commercially backed by JetBrains, whose paid IDE business, including IntelliJ IDEA and the IntelliJ Platform behind Android Studio, is closely tied to Kotlin’s success. KMP has a shorter Stable track record than .NET MAUI, but Kotlin itself has been under development by JetBrains since 2011 and has been officially supported by Google for Android development since 2017. This combination of backing from JetBrains and Google significantly reduces the risk of platform discontinuation.

Bottom line: Both frameworks carry an acceptable level of vendor-discontinuation risk for most businesses today. .NET MAUI offers a longer Stable track record, while Kotlin Multiplatform benefits from broader language-level backing.

The .NET MAUI development model is a single project that compiles to native binaries per target platform. C# is a mature, strongly-typed language with broad use across web, desktop, mobile, and server engineering, which means a single .NET developer can move across most layers of an application and its back end without a language switch.

Kotlin Multiplatform uses a different model. The codebase is split into a shared Kotlin module that holds business logic and per-platform application modules that consume it. Each platform team keeps its existing IDE and toolchain; the shared module is the only new artifact added to either side. Kotlin itself is a modern language with built-in null safety, coroutines, and Java interoperability.

Bottom line: .NET MAUI reduces cognitive load for teams already working in C#. Kotlin Multiplatform is better suited to teams that want iOS developers to stay in their Swift and Xcode workflow while still eliminating duplicated business logic.

.NET MAUI relies on a shared XAML-based UI layer. Thanks to this approach, design and interface changes can be implemented once and shipped across platforms. The trade-off appears when an app needs to match platform-specific behavior more precisely. If a screen feels slightly different from native iOS or Android expectations, teams may need to implement platform-specific adjustments. This case can reduce the benefits of a single shared codebase.

Kotlin Multiplatform takes the opposite approach by default. Business logic is shared, but the UI is built separately for each platform, typically using SwiftUI or UIKit for iOS and Jetpack Compose for Android. Because of this logic, user-facing screens often need to be developed twice, and visual consistency depends on strong design discipline rather than shared UI code.

The payoff is a more native user experience. Since each platform uses its own UI framework, iOS and Android apps can behave exactly as users expect, without a translation layer between shared code and native controls. Compose Multiplatform can reduce this trade-off by adding a shared UI layer on top of Kotlin Multiplatform. However, for applications that extend beyond mobile and place a strong emphasis on platform-specific conventions, native UIs remain the stronger option.

Bottom line: Choose .NET MAUI when a shared UI and faster cross-platform delivery are the main priorities. Choose Kotlin Multiplatform when an uncompromised native UI on each platform is essential.

The two frameworks cover overlapping but not identical territory. .NET MAUI ships to iOS, Android, macOS, and Windows from one codebase. When combined with Blazor Hybrid, it can also extend the same development investment to web applications. For Microsoft-stack teams, this means a single .NET project can reach every major desktop and mobile platform a typical business product targets.

Kotlin Multiplatform reaches farther on the server and web side, with less first-party support on desktop. The same Kotlin codebase can target iOS, Android, JVM server applications, web targets through Kotlin/JS or Kotlin/Wasm, and native desktop binaries. However, desktop support is not as mature or tightly integrated as .NET MAUI’s first-party support for Windows and macOS, which may require additional engineering effort.

Bottom line: .NET MAUI offers broader choices for teams that need native desktop support alongside mobile. Kotlin Multiplatform is, in turn, a better option for teams that want to extend the same codebase into the back end and the web alongside mobile.

.NET MAUI compiles applications into platform-native binaries and benefits from ongoing performance improvements in the broader .NET ecosystem. Thanks to the support for technologies such as .NET’s Native AOT and JIT pipelines introduced in each .NET release, MAUI can efficiently handle demanding applications and data-intensive workloads. For high-load applications and data-heavy workloads, .NET MAUI benefits from the same underlying runtime that powers .NET on the server.

Kotlin Multiplatform takes a different approach. On Android, shared Kotlin code executes on the same runtime that powers native Android apps. On iOS, shared code is compiled into native binaries through Kotlin/Native and the LLVM toolchain. Since user interfaces are typically built with each platform’s native UI framework, Kotlin Multiplatform introduces virtually no additional rendering layer between the application and the operating system.

Bottom line: In practice, both frameworks are capable of delivering responsive, high-performance applications. As a result, performance is rarely the deciding factor when choosing between the two frameworks. The differences are more apparent in architecture and development approach than in end-user performance.

That said, however, .NET MAUI may be a stronger fit for organizations building high-load enterprise applications within the .NET ecosystem, while Kotlin Multiplatform offers a more predictable path for teams that prioritize platform-native behavior and performance characteristics.

.NET MAUI’s single-project architecture helps streamline development by allowing teams to manage shared UI and business logic from one codebase. Combined with features such as .NET Hot Reload, developers can quickly test changes and see results across iOS, Android, and desktop platforms without maintaining separate development workflows. For new projects starting from scratch, this single-project model usually translates to a faster MVP timeline.

Kotlin Multiplatform takes a different approach. iOS and Android developers continue working within their native toolchains, such as Xcode and Android Studio, while sharing business logic through a common Kotlin module. This allows platform specialists to remain productive in familiar environments, but it also introduces additional coordination compared to a fully shared project. The shared logic does save real time on every feature that touches both platforms, but the UI on each side is still implemented and tested separately.

Bottom line: .NET MAUI generally offers a faster route to market, particularly for shipping new projects and teams using .NET. Kotlin Multiplatform can deliver greater efficiency over the long term, as the benefits of shared business logic accumulate throughout the product’s lifecycle.

The C# talent pool is larger than the Kotlin pool by close to a 3:1 margin. The Stack Overflow Developer Survey 2024 puts C# at 28.8% among professional developers, compared with Kotlin at 9.9%. .NET developers have been a steady backbone of enterprise software hiring for two decades, so for a team that needs to hire .NET MAUI developers, the supply pool is deep. Many of those developers can also move across web, desktop, mobile, and back-end .NET work without switching languages.

Kotlin’s talent market is healthy on the Android side and growing on the multiplatform side. Android engineers have been writing Kotlin as their primary language since 2017, so finding Kotlin developers for Android work is straightforward. In fact, Kotlin is already used by over 60% of professional Android developers, and 95% of the top 1,000 Android apps contain Kotlin code.The KMP-specific specialist pool is newer and smaller than the broader Kotlin pool, but JetBrains and Google’s continued investment, alongside the growing list of production deployments, are widening it steadily.

Bottom line: Hiring is easier on the .NET MAUI side today, especially at scale. Kotlin Multiplatform is the hardest hire for a pure-KMP specialist, but easier if you find a reliable cross-platform development company.

Recent studies show that cross-platform development can lower project costs by approximately 30% compared with maintaining separate native iOS and Android codebases.

Beyond that baseline, .NET MAUI can lower ongoing cost for teams already using Microsoft stack thanks to using Visual Studio licenses, .NET engineering skills, and Azure infrastructure. All of these carry forward into a MAUI project without requiring further spending.

Kotlin Multiplatform can offer additional savings for organizations that already use Kotlin or JVM technologies on the back end. By sharing domain models, business rules, validation logic, and serialization code across server and mobile applications, teams can eliminate a significant amount of duplicated development effort. The trade-off shows up on the UI side, since developers need to maintain SwiftUI and Jetpack Compose as two separate codebases. That cost is most visible on applications with frequent visual changes.

Bottom line: .NET MAUI is a more affordable choice for Microsoft-stack teams. Kotlin Multiplatform is a more reasonable choice when the back end and the mobile clients can share substantial domain code.

.NET MAUI’s ecosystem benefits from the broader .NET community. There are more than 3,550 .NET MAUI NuGet packages alone, sitting on top of more than 387,000 total .NET packages that can be reused inside a MAUI project. Syncfusion contributes more than 65% of community contributions to MAUI, which gives the framework a well-supported library ecosystem.

Kotlin Multiplatform’s ecosystem is newer and more specialized than .NET MAUI’s. Its core libraries, including Ktor for networking, kotlinx.serialization for data processing, and kotlinx.coroutines for asynchronous programming, provide the essential building blocks most shared modules need. In addition, many Android libraries can be used within KMP projects when they support multiplatform development, and a growing number of popular Kotlin libraries now offer multiplatform compatibility out of the box.

Bottom line: .NET MAUI has the larger and more mature library ecosystem today. Kotlin Multiplatform’s ecosystem is smaller but growing fast, and it is well-targeted at the kinds of code teams typically want to share.

.NET MAUI integrates most naturally with the Microsoft cloud and back-end stack. ASP.NET Core, Azure, Microsoft Entra ID, and Blazor are all first-party citizens in a MAUI project. One of the most compelling advantages here is the ability to reuse Blazor components within .NET MAUI (a so-called hybrid Blazor approach), which, based on our experience, allows up to 90% code reuse and a consistent web and mobile experience. Teams running on AWS or GCP can still ship MAUI apps that talk to those back ends through standard HTTP and SDK calls, but the friction is highest where the rest of the stack is purely Java or purely Node.

Kotlin Multiplatform fits naturally inside a Kotlin or JVM tech stack. Spring Boot, Ktor, kotlinx libraries, and Jetpack Compose on Android line up with KMP cleanly. The JVM back end is well represented in the same Stack Overflow Developer survey, with Spring Boot used by 14.2% of professional developers and the Spring Framework by 12.9%. Teams running a .NET back end can still adopt KMP for mobile, but the shared-back-end-with-mobile benefit shrinks because the server is no longer written in Kotlin.

Bottom line: .NET MAUI wins when the rest of your stack is Microsoft-aligned. Kotlin Multiplatform wins when the rest of your stack is JVM-aligned.

.NET MAUI is the right choice when your business already runs on the Microsoft stack, when your product needs to reach desktop as well as mobile, or when you are modernizing an existing Xamarin or WPF application. The scenarios below translate these parameters into decision points.

If your engineers already build in C# and your back end already runs on ASP.NET Core and Azure, .NET MAUI extends that investment to mobile without adding a new language or toolchain. The same developers can own the web, desktop, mobile, and back-end layers, which allows you to save costs on hiring and onboarding new team members.

.NET MAUI ships to Windows and macOS from the same codebase that targets iOS and Android. For business tools that need a desktop client alongside the mobile app, such as field service, logistics, or internal enterprise software, this removes the need for a separate desktop project. This is the use case where MAUI’s platform reach is hardest for Kotlin Multiplatform to match.

.NET MAUI is the direct successor to Xamarin, so teams modernizing a Xamarin.Forms app follows a supported migration path rather than a full rewrite. The same applies to businesses that need to extend an existing WPF desktop application to mobile, where much of the existing .NET code carries forward. Leobit’s software reengineering and modernization team regularly handles these transitions.

For data-heavy or computation-heavy applications, .NET MAUI inherits the performance characteristics of the .NET runtime. Leobit used .NET MAUI with Blazor to build a cross-platform concert ticketing platform that handles high-load ticketing workflows, and a proof of concept for a cinema media platform that we delivered in a short timeframe through heavy code reuse.

Long-running products usually outlive the engineers who start them. The larger .NET talent pool makes it easier to replace and grow the team over a multi-year lifecycle, which lowers the staffing risk that comes with any long-term project.

Kotlin Multiplatform can be the right choice when your product is already Android-first, or when a fully native UI on each platform is a hard requirement. Below, we list the cases where KMP has a clear advantage.

If you already have an Android app written in Kotlin, KMP lets your existing team move the business logic into a shared module and reuse it on iOS, instead of rewriting it in Swift or C#. The Android team you already have becomes the foundation for the iOS build, which shortens the path to a second platform.

When your users expect an interface that exactly matches their operating system, KMP can keep the native UI on each platform (i.e., SwiftUI or UIKit on iOS, and Jetpack Compose on Android). It has no shared-UI abstraction that could introduce visual or behavioral differences. This can be an advantage for apps that heavily rely on design.

If your server already runs on Spring Boot, Ktor, or another JVM stack, KMP lets you share domain models, validation, and serialization between the back end and the mobile clients. This removes a class of bugs that come from keeping the same business rules in sync across separately written codebases.

KMP can target Android, iOS, a JVM back end, web through Kotlin/JS or Kotlin/Wasm, and native desktop, all in Kotlin. For teams that have chosen Kotlin as their primary language, this keeps the whole product, from server to mobile client, in one language and one set of libraries.

KMP’s tooling and library ecosystem is younger than .NET’s. For teams that value uncompromised native UI and shared logic highly enough to invest in a growing ecosystem, that trade is worth making, and the production track record at companies running KMP at scale shows the trade pays off.

Selecting the right framework becomes much easier when you work with a team that has proven experience delivering cross-platform applications in production. As a Microsoft Solutions Partner with 78 Microsoft-certified engineers, Leobit has extensive expertise in the .NET ecosystem and a strong track record of delivering .NET MAUI projects.

Our expertise extends beyond the Microsoft stack. Leobit has successfully delivered more than 30 mobile-first projects and is recognized among the leading Android and iOS development companies. Because Kotlin Multiplatform builds on the same Kotlin language and native mobile technologies our teams work with every day, we are well equipped to help clients adopt and scale KMP-based solutions.

If you are still evaluating .NET MAUI and Kotlin Multiplatform, Leobit can help you make the decision. During the discovery phase, we assess your existing technology stack, team capabilities, target platforms, business requirements, and product roadmap. Based on these findings, we provide a framework recommendation along with an architecture and delivery plan tailored to your goals.

Our focus goes beyond launching the first version of your product. We help ensure that the technology choices you make today continue to support your product’s growth and maintainability in the future.

Both .NET MAUI and Kotlin Multiplatform are mature, production-ready frameworks in 2026, and either can serve as a strong foundation for a cross-platform application. There is no universally “best” framework for mobile app development — the right choice depends on your business goals, technical requirements, and existing technology stack.

.NET MAUI is often the better fit for organizations already invested in the Microsoft ecosystem, those that need desktop and mobile support from a single codebase, or teams modernizing existing Xamarin or WPF applications. Kotlin Multiplatform is typically a stronger choice for Android-first products, applications that require a fully native user experience on each platform, or organizations looking to share business logic between mobile apps and a Kotlin- or JVM-based back end.

However, selecting the right framework is only the first step. The long-term success of a project depends just as much on how effectively the technology is implemented and maintained. Working with an experienced development team can help you avoid common pitfalls and maximize the value of your technology investment.

Whether you choose .NET MAUI or Kotlin Multiplatform, Leobit can help you validate the decision, define the right architecture, and successfully deliver your product. Contact us to discuss your cross-platform development project and find the approach that best fits your business needs.