Some businesses will benefit from a mobile app to customize the customer journey and experience. That said, many businesses invest in hiring a web developer or partnering with an agency to create their custom apps. However, don’t partner with any agency because some agencies might only specialize in creating apps for one operating system. That said, you need to find a reliable cross platform app development agency to partner with. But before we list the best agencies to work with, let me give you a quick overview of cross platform app development.
What is Cross Platform App Development?
Cross platform app development refers to the development of applications that are accessible on various platforms like iOS and Android. Web developers use a single code base to ensure that the apps work on multiple platforms without issues. They also use frameworks and tools to ensure that your app is compatible with multiple operating systems.
What Are The Frameworks for Cross Platform App Development?
JavaScript is the common programming language used to code for cross platform apps. However, which frameworks are used by expert web developers?
- Flutter
- React Native
- Ionic
- Sencha
- Kotlin (this is not a framework, but a programming language)
Best Cross Platform App Development Agencies in 2025
1. Zazz
Work with one of the best mobile app agencies for your custom mobile app. Zazz has deployed over 397 apps and delivered over 500+ projects to various clients globally. The agency works with global brands and organizations like BASF and the Golden State Warriors. Here are the web development services that the agency offers:
- iOS and Android app development
- React Native and Flutter development
- Custom software development
- UI/UX development
- Web development
In addition to these, the agency specializes in blockchain, cloud computing, VR/AR, IoT app development, and front-end development.
2. Appmakers LA
Here’s another trusted cross platform app development agency to work with. App Makers LA has an expert team of 30 developers working to produce the best apps for its clients. The developers observe the best coding practices, ensure security practices, and provide support and maintenance after deployment. The agency specializes in the following:
- Custom software development
- Mobile app development
- Web development
- AI
- Low-code/no-code solutions
- iOS and Android development
- Staff augmentation
The agency follows a two-phase development process, ensuring that your specifications are followed and your app is deployed on time! Additionally, the agency uses apps like Figma and Airtable to create apps. Eksperience, Blip, and Bookclub are some of its developed apps.
3. Designli
Designli is another reliable mobile app development agency to get the best apps from. In addition to cross platform development, they also specialize in UX/UI design, web apps, and custom software. This agency helps startups, enterprises, and SMBs. Many companies like partnering with this agency because they make app development easier. Aside from the agency’s dependable nature, expect them to be communicative, respectful, proactive, and inquisitive. Michelin, Rotary, and Goodwill were some of its partner brands.
4. TechAhead
Check out another agency focusing on mobile app development. TechAhead uses AI to build its apps. Aside from app building, the agency also builds and offers AI and ML apps, cloud and DevSecOps, IoT and custom software apps, web and backend, design and consulting, and enterprise solutions. Here are the industries that TechAhead specializes in:
- Healthcare
- Fintech
- eCommerce
- Fitness
- Insurtech
- Education
- Travel
- Construction
- Social media
- Sports
- Real estate
- Restaurant
Additionally, you can hire developers to make your team more productive! Some of its clients include AXA, ESPN, and Audi.
5. Somnio Software
Somnio Software is a Flutter expert, making it a cross platform development agency. Aside from developing your app, you can come to them for product discovery to help you understand how the agency will make your app. Finally, the agency can also help you augment your staff! You can work with the agency if your industry is:
- Fintech
- Healthcare
- Education
- Fashion
- Media & entertainment
- Retail & eCommerce
You can trust them for web development work since they have created 100 applications in Flutter and have 100+ professionals on the team. Its clients include ProWallet, Jaac, and Aqilis.
6. Quytech
Here’s another agency using an AI-first approach to build its apps. Quytech uses various systems and technologies to build apps for startups, entrepreneurs, and small businesses. However, they have also helped around 150 Fortune 500+ companies and developed apps for businesses around the globe. Brands like Honda, HP, and IBM trust the agency. Its mobile app development services are:
- Android and iOS app development
- React Native app development
- Swift app development
- Flutter app development
- Enterprise app development
- IoT development
7. SEM Nexus
Do you want to work with an all-around app development and marketing agency? SEM Nexus should be your partner agency. The agency has a four-step process when building and promoting an app. It starts with discovery, about learning more about your business and the purpose of creating an app. Then, its UI/UX designers create wireframes and develop prototypes. After that, its developers build the app using the frameworks mentioned above. Finally, they promote the app on respective app stores and other marketing strategies like social media and email.
Some of its apps are Call My Listing, Cheers Mate!, and Lew.
8. Brainhub
Our final pick for the best cross platform app development agency is Brainhub. Since 2015, the agency has built apps for the biggest brands and organizations, like Credit Suisse, National Geographic, and PWC. Here’s an overview of what the agency offers:
- Web development
- Mobile and desktop app development
- Cloud engineering and DevOps
- Digital product development
- UX/UI design
- Generative AI development
- Legacy app modernization
- Discovery workshop
They use these technologies to develop an app for clients:
- Typescript
- .NET
- Node.js
- React
- React Native
- Electron
- AWS
Final Thoughts
A cross platform app isn’t possible to make by yourself if you don’t have any web development agencies. This complex project requires the technical expertise of skilled web developers using a mix of programming languages and frameworks. Agencies are the best companies to connect with from discovery to deployment. Plus, some agencies can also promote your app to ensure that your end users will download and use your app.
