Top 7 Flutter Development Agencies in London for 2026: Build Scalable, High-Performance Apps

Flutter has become the framework of choice for businesses looking to build fast, scalable, and visually engaging apps across iOS, Android, web, and desktop, all from a single codebase. Its ability to deliver native-like performance while reducing development time makes it ideal for companies aiming to innovate quickly.

London, as one of Europe’s most vibrant technology hubs, provides a unique environment for digital innovation. From fintech startups to global enterprises and digital-first brands, businesses in the city face high competition and a demand for fast, reliable, and user-friendly applications. The local ecosystem encourages cross-platform adoption, rapid prototyping, and scalable solutions, making Flutter a natural fit for London-based companies seeking to stay ahead.

This blog highlights the top Flutter development agencies in London for 2026, focusing on teams delivering production-ready applications rather than prototypes. It covers agencies’ expertise in architecture, performance optimization, UI/UX design, backend integration, and migration from legacy systems. Whether you are launching a new MVP, scaling a consumer-facing app, or modernizing an enterprise mobile platform, this guide showcases agencies that combine local market understanding with global Flutter expertise to help your business achieve long-term success.

Top-Rated 7 Flutter Development Agencies in London for 2026

1. Weframe Tech

Best Overall Flutter Development Agency in London

Core Services

• Flutter app development (iOS, Android, Web)

• MVP and startup app development

• Enterprise Flutter applications

• Migration from native iOS/Android & React Native

• API, backend, and third-party integrations

• UI/UX implementation & animations

• Ongoing maintenance and scaling

Experience

Weframe Tech has extensive experience building Flutter applications in London startups, funded scale-ups, and enterprise clients. Their portfolio includes consumer-facing apps, fintech platforms, internal enterprise tools, SaaS products, and high-traffic applications, all built with a strong focus on performance and long-term maintainability. They specialise in helping London-based companies reduce development costs and accelerate delivery by consolidating multiple native apps into a single Flutter codebase, without sacrificing native performance or UX quality.

Strengths

• 100% Job Success Rate on Upwork

• Deep Flutter architecture and state management expertise

• Proven experience with complex, scalable applications

• Strong UI/UX and animation capabilities

• Fast MVP delivery (6–10 weeks)

• Cost-effective delivery compared to UK-only teams

Summary

Weframe Tech is the best Flutter development agency in London on Upwork in 2026, delivering high-performance, scalable mobile and web applications at competitive rates for million-dollar companies such as Certify ($50M funded), Catalyser, and others. With deep Flutter expertise and a strong track record across industries, Weframe Tech is the leading choice for London businesses seeking modern, cross-platform, performance-driven mobile solutions.

2. Empat

Empat is a digital product studio working with startups and businesses to deliver mobile and web applications, including Flutter-based solutions.

Core Services

• Flutter app development

• Mobile and web product development

• UX/UI design

• Backend and API integration

Strengths

• Product-focused delivery approach

• Experience with early-stage and growth-stage companies

• Emphasis on design quality and usability

3. GeekyAnts

GeekyAnts works across mobile and web platforms and has delivered Flutter applications as part of broader cross-platform development initiatives.

Core Services

• Flutter application development

• Design systems and component libraries

• Backend integrations

• Ongoing maintenance

Strengths

• Large engineering team

• Experience across multiple frontend frameworks

• Suitable for companies needing long-term development support

4. Very Good Ventures (VGV)

Very Good Ventures is known globally for its deep involvement in the Flutter ecosystem and for delivering Flutter-based products and tooling.

Core Services

• Flutter application development

• Flutter consulting and architecture

• Design systems and reusable components

• Long-term product support

Strengths

• Deep Flutter framework expertise

• Strong engineering standards

• Suitable for teams making long-term investments in Flutter

5. Webskitters

Webskitters provides mobile and web development services and has delivered Flutter applications for businesses across industries.

Core Services

• Flutter mobile app development

• Custom software solutions

• Backend and API integrations

• Maintenance and support

Strengths

• Flexible engagement models

• Broad development experience

• Suitable for SMEs and mid-market businesses

6. Intelivita

Intelivita is a UK‑based app and software development agency with strong expertise in building cross‑platform solutions, including Flutter applications, for businesses and enterprises.

Core Services

• Flutter application development and consulting

• Cross‑platform mobile app development

• UI/UX design and product planning

• Backend and API integration

Strengths

• Proven track record delivering high‑quality Flutter and cross‑platform apps

• Flexible engagement models

• Deep technical foundation across mobile, web, and custom software solutions.
  
  

7. Chilliapple

Chilliapple is a London‑based app and web development agency that offers end‑to‑end Flutter application services tailored to UK businesses of all sizes.

Core Services

• Bespoke Flutter app development

• Flutter consulting and strategy

• API development and backend integration
  
  

Strengths

• Focused on delivering secure, scalable, and high‑performance Flutter apps

• Offers expert guidance from concept through launch,

• Long‑term partner for maintenance, enhancements, and compatibility 

Conclusion

When it comes to building or scaling your mobile and web applications, having the right Flutter development partner can make a real difference for you. London’s tech ecosystem moves fast, and you need an agency that understands both the local business environment and global app standards. With the right partner, you can launch cross-platform apps that are high-performing, visually engaging, and easy to maintain, all without managing multiple codebases.

While many agencies offer Flutter services, Weframe Tech stands out as the trusted partner for businesses seeking scalable, flexible, and high-performance Flutter solutions in London. Whether you’re migrating a legacy app, creating a new MVP, or expanding an existing Flutter application, you’ll benefit from expert guidance on architecture, performance, integrations, and UI/UX design. The right team helps you save time, reduce costs, and deliver consistent experiences to your users across devices. With Weframe Tech, you can try this for yourself with 10 complimentary development hours, giving you a hands-on look at how your app can scale, perform, and succeed.

Book a consultation today and experience the difference of working with a London-based Flutter partner committed to your success.