Access vetted Flutter development companies in the UK delivering cross-platform excellence. Expert teams, proven track record, faster app deployment

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The best Flutter Software Development Firms

Sigli logo

Sigli

Verified

Software development, Web development, Data Solutions, AI, ML.

Sigli is a forward-thinking software development company specializing in digital product development and digital transformation.

Our mission, ‘Data Science with Purpose, Innovation with Impact’, drives us to transform innovative ideas into practical solutions. Our services encompass the entire development lifecycle, from initial concept to implementation, ensuring every product we build is high-quality, scalable, and future-proof.

Sigli assists businesses in navigating the complexities of digital transformation, modernizing their operations, enhancing customer experiences, and maintaining a competitive edge in the ever-evolving digital landscape. Our team's deep expertise, combined with a commitment to leveraging the latest technologies and best practices, ensures we deliver impactful results for our clients.

Our dedication to excellence is further demonstrated by our ISO/IEC 27001 certification, the leading standard for Information Security Management Systems (ISMS). This certification underscores our commitment to maintaining the highest standards of information security, making us a trusted partner for businesses looking to thrive in the digital age.

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5.0 (10 review)
115 employees
Antwerp, Belgium
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TRIARE logo

TRIARE

Verified

TRIARE unlocks IT potential of YOUR business

TRIARE is a WEB and MOBILE software development company based in Europe. We are delighted to offer our services as your long-term partner, taking all technical matters off your shoulders and allowing you to focus on your business development.

YOU WILL GET:

In-house team. Work with a dedicated team that is 100% focused on your product and located in the same office.

Efficiency & transparency, as our process is based on Scrum methodology and managed by certified Scrum Masters.

Fast result. Working with us, you will get the first result in 1 week.

High quality, as TRIARE has well-established processes of software development and experienced specialists.

Full cycle development. Our company covers all stages of development, handling everything from Discovery and prototyping to Design, development, and maintenance.

IP rights. From the very beginning, you are the only owner of the intellectual property of your project materials: source code, design, documentation, etc.

Warranty period will be provided for your system for free.

ASPECTS OF OUR MINDSET:

- Focused on results. We are focused on the result of your business with an understanding of the real goals and KPIs that our team should achieve.

- Solution Provider. It means that we always come to you with solutions, not with questions. We take all technical aspects of the project off your shoulders, allowing you to focus on the marketing and business strategies.

- We go the extra mile. Being a proactive company, we always think and take a step ahead.

TECHNOLOGIES WE USE:

- Mobile app development: Kotlin, Java, Swift, Objective-C.

- Cross-platform development: Flutter, React Native.

- Web frameworks: Node.JS, React.JS, PHP, Ruby on Rails.

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5.0 (11 review)
50 employees
Cherkasy, Ukraine
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Instinctools logo

Instinctools

Verified

Your AI-powered Engineering Partner

Meet *instinctools - a global AI-powered software engineering company with over 25 years of experience.

We help both SMBs and Enterprises build robust, scalable software solutions that excel in functionality and design.

Our core services include:

  • Agentic AI enablement
  • Custom software development enhanced by deep AI expertise
  • Digital product engineering
  • Business process automation
  • Legacy system modernization
  • Advanced data analytics and visualization
  • Cloud infrastructure and DevSecOps

Headquartered in the USA (Maryland) and Europe (Germany), *instinctools offers convenient locations for meeting and collaborating directly with our clients.

We have development centers in Poland, LATAM, India, and Kazakhstan that combine global expertise with a strong price-quality balance to ensure exceptional results across time zones.

Our work is backed by ISO-certified quality standards, strategic partnerships with leading tech platform, and a long-standing commitment to engineering excellence. Instinctools holds a broad portfolio of regional and industry-specific certifications, including CIR, HIPAA, and other compliance frameworks required for regulated markets.

The 2025 Annual Customer Satisfaction Index is 9.1 out of 10.

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5.0 (10 review)
400 employees
Stuttgart, Germany
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Evangelist Apps logo

Evangelist Apps

Verified

Best Custom App Development Agency in the UK

At Evangelist Apps, we don’t just build apps, we craft intelligent mobile solutions tailored to business needs. With over two decades of experience, we guide our clients with best practices, smart architecture, and forward-thinking UX/UI.

Our team has delivered high-performance apps for some of the world’s most trusted brands including British Airways, BBC, UBS, KLM Airlines, Virgin Money, Channel 4, Hastens, and BMJ. From concept to launch, we deliver quality, agility, and cost-efficiency every time.

BTW, we are also an official Microsoft Cloud AI Partner!

Whether you’re a startup or an enterprise, we help bring your ideas to life with pixel-perfect design, robust engineering, and unmatched reliability.

Why Choose Us

• 23+ years of mobile expertise

• A seasoned, cross-functional app development team

• Agile delivery with regular builds and updates

• Cost-effective offshore development without quality compromise

• End-to-end ownership from discovery to deployment

Our Expertise

• Native iOS and Android apps

• Cross-platform apps using React Native & Flutter

• Clean, user-focused UX/UI design

• Scalable backend & API integrations

• Dedicated teams for QA, DevOps, and Project Management

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5.0 (3 review)
50 employees
Hampshire, United Kingdom
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Bullshark logo

Bullshark

Verified

360-degree solutions across strategy, technology, marketing and data.

We don’t just deliver digital—we build engines for growth.

Founded in 2020, Bullshark is a relentless force in strategy, tech, marketing, and data. We partner with ambitious organisations to drive revenue, scale operations, and unlock competitive edge.

WHAT WE DO

We operate across four core service lines. Each built to move the needle:

(1) Strategy

We cut through the noise. No fluffy decks. Just sharp insights and clear roadmaps that solve real business problems.

(2) Technology

From high-performing websites to full-scale enterprise platforms—if you can dream of it, we’ll deliver it. No limits. No confusion. Just powerful tech that delivers.

(3) Marketing

We handle the full marketing stack—from content to performance. Everything focused on one thing: growth. Think more leads, more conversions, more lifetime value.

(4) Data

We turn scattered data into structured intelligence. From data pipelines to dashboards, we build the foundations for clean, high-quality data that powers better decisions. Our data engineering services help clients boost accuracy, accessibility, and real-time value.

OUR AI EDGE

We don’t just talk about AI—we implement it where it matters.

Bullshark offers strategic and hands-on AI services that create real-world impact. From off-the-shelf tools to custom-built models, we help businesses unlock smarter operations, sharper insights, and new revenue streams.

What we offer:

AI strategy and roadmapping

Automation and productivity tools

Data-driven decision systems

AI-powered customer experiences

Custom model development and integration

+ More

We build, train, deploy, and scale AI solutions that fit your business—not the other way around.

WHO WE WORK WITH

We’ve earned the trust of 200+ brands across the globe—from Wolt and Pfizer to Hyatt and the Government of Malta.

WHERE WE OPERATE

Headquartered in Malta, growing fast in the UK, and delivering worldwide. We serve clients across Europe, Middle East, North America. Local firepower, global mindset.

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4.8 (14 review)
35 employees
Birkirkara, Malta
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Fulminous Software logo

Fulminous Software

Verified

WE LOVE TO BUILD ASK FOR IT AND HAVE IT

We are Fulminous Software, a skilled web and mobile app development company with a proven history of creating popular and profitable apps. We're known for our knack for enhancing existing apps and websites to make them even better, ensuring people keep downloading and enjoying them. Our dedicated team is here to turn your ideas into reality.

The company’s biggest strength is its team which I a mix of most ingenious and focused individuals who are adroit in whatever they do. They believe in delivering flawless and reliable solutions to clients that match business needs and drive business growth. We are looking for strategic partnerships from around the globe. If you are interested please contact us today.

Client's Feedback About US:

https://clutch.co/profile/fulminous-software-private#highlights

https://www.bark.com/en/in/company/fulminous-software-private-limited/9AKJO/

Our Key services:

* Custom Software development

* Mobile App Development (Android App, iPhone App, Cross-Platform App)

* Custom Game Development (AR, VR, iOS, Android, NFT, Metaverse, 2D, 3D)

* Salesforce Development (Lightning, Implementation, Consulting)

* Web Development

* Mobile Game Development

* Desktop Game Development

* Xamarin App Development

* Wearable Devices App Development

* Enterprise App Development

* CRM & ERP Development

* Digital Marketing

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5.0 (38 review)
124 employees
Clarendon County, United States
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U1CORE logo

U1CORE

Verified

U1CORE — B2B Full-Cycle Product Development Bureau for Innovative SaaS Brands

U1CORE specializes in exceptional design solutions for companies in B2B, AI, SaaS, Web3, and other industries. We use the latest technologies to create designs that look great and deliver real business results.

Our user-first approach and focus on emerging technologies allow us to create seamless, growth-driven designs that drive conversions and engagement, all while delivering fast, high-quality solutions.

We offer comprehensive design, developer, marketing, leadgeneration services, including Product Design, Web Design, UI/UX Design, 3D and other services tailored to meet the specific needs of industries like B2B, AI, SaaS, Web3 and other niches. We can either calculate the cost of your project and fix the price, or offer a subscription for ongoing needs.

Design Subscription

Our monthly subscription gives you unlimited design requests, fast 1-2 day turnaround, dedicated project management, and unlimited revisions. Pause or cancel anytime — no project-by-project hassle.

Services: Product, Web, UI/UX Design, marketing, leadgeneration, 3D.

Industries: AI, SaaS, Web3, B2B.

Pricing: Choose between a monthly retainer subscription for continuous design support or fixed pricing based on your project requirements.

Let’s collaborate and elevate your product!

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5.0 (3 review)
40 employees
London, United Kingdom
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Debut Infotech logo

Debut Infotech

Verified

Results, Not Promises

Debut Infotech is an AI-augmented blockchain and software development company helping organizations across financial services, healthcare, supply chain, and digital platforms build systems that perform reliably in complex, regulated environments. Founded in 2011 and blockchain-native since 2015, the company brings engineering discipline and technology depth to enterprises moving from fragmented pilots to production-grade systems.

With delivery centers across the USA, UK, Canada, and India, Debut Infotech combines regional market understanding with globally distributed engineering capability — enabling clients to move with speed, consistency, and governance.

Service areas:

  1. Artificial intelligence and generative AI — Enterprise LLM integration, AI agent development, retrieval-augmented generation (RAG) pipelines, predictive analytics, computer vision, and intelligent process automation embedded at the system architecture level.
  2. Blockchain and Web3 development — Smart contract engineering, DeFi protocol development, real world asset (RWA) tokenization, cryptocurrency exchange infrastructure, and enterprise blockchain on Hyperledger Fabric and Corda.
  3. Mobile application development — Native iOS, Android, and cross-platform applications (React Native, Flutter) architected for AI integration, enterprise-grade security, and sustained performance under production load.
  4. Web and software development — Full-stack web platforms, SaaS products, and enterprise software systems engineered API-first, designed for long-term maintainability and organizational scale

Proven Delivery:

  • $62M+ raised across client platforms including Ifinca, IntegraLedger, Everledger, and TĒM
  • 90% customer success score across enterprise engagements
  • 15 years of enterprise software delivery
  • Fortune 500 clients and high-growth startups across 25+ industry verticals
  • 50–249 engineers spanning AI, blockchain, and software disciplines

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5.0 (5 review)
150 employees
Chandigarh, India
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iDigitalize.net logo

iDigitalize.net

Verified

Top Digital Marketing Agency, Trusted Worldwide!

A full-service, performance-first agency with 15+ years of experience, 75+ full-time professionals, and 90% referral revenue from digital, creative, and technology services and solutions. As the best digital marketing company in India, we work around the globe, enabling us to stay at the top of our game worldwide.

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5.0 (7 review)
70 employees
Tirana, Albania
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KeyToTech logo

KeyToTech

Verified

We help startups and companies develop and launch agile software products

KeyToTech is a software development agency. We deliver AI, mobile, web, and backend services to companies worldwide.

(0 review)
28 employees
London, United Kingdom
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EchoGlobal logo

EchoGlobal

Verified

★ Hire Top Remote Software Developers

☂ ISO 27001 Certified Tech Talent Provider | ⚑ Eastern Europe & LATAM | ◉ Trusted by Fortune 500 Companies | ✔ 10+ Years of Experience | ✱ 1-Week Risk-Free Trial

5.0 (2 review)
20 employees
Greater London, United Kingdom
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Agile Cyber Solutions Limited logo

Agile Cyber Solutions Limited

Verified

Transforming Ideas into AI-Driven Web and Mobile Apps.

Founded in 2012, Agile Cyber Solutions has been helping startups and small and medium enterprises (SMEs) grow with reliable custom software solutions. We specialise in developing AI-integrated products and services that empower SMEs to deliver innovative, modern solutions to their customers. With expertise in both open-source AI models (for privacy-focused solutions) and commercial AI models (for cutting-edge capabilities), we tailor our approach to meet your unique needs. From automating workflows to improving customer experiences, our tools drive efficiency, reduce costs, and enhance the value of your products and services. Get in touch to explore how our AI-powered solutions can transform your business.

Our success is rooted in a clear and deliberate approach. We believe in collaboratively challenging solutions and technology choices to refine and align them perfectly. By deeply engaging with business use cases and implementation, we add value beyond coding, turning ideas into practical, impactful solutions. We pride ourselves on the honesty to say no to requests we cannot deliver. By staying super-focused on development and collaborating with experts for areas like UI/UX and SEO, we ensure that every aspect of your project receives the specialised attention it deserves.

With a development team in India and a customer-facing team in the UK, we offer the best of both worlds: strong technical expertise and local understanding. Over the years, we’ve successfully delivered more than 350 projects for SMEs across diverse industries, earning a reputation for reliability and innovation.

Still unsure? Work with us risk-free. We are so confident in the quality of our solutions that we offer a no-risk, money-back guarantee. If we don’t deliver as promised, we’ll refund your investment—no questions asked. Contact us today to learn more about our offerings and start your risk-free journey to discovering how we can help your business grow.

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5.0 (10 review)
70 employees
London, United Kingdom
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Poppins logo

Poppins

Verified

We are a house of strategy, creative, social and digital technology specialists.

We craft beautiful brand expressions, digital experiences and products. All underpinned by thoughtful strategy. We’re driven to help our clients be the best version of themselves through the power of brand and digital. Because we’re certain there is something uniquely special inside each and every business.

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5.0 (6 review)
60 employees
Greater London, United Kingdom
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SDLC Corp logo

SDLC Corp

Verified

Your Technology Partner

SDLC Corp stands as a global technology powerhouse with 400+ certified developers, engineers, architects, designers & product experts delivering high-impact digital solutions across industries. With 1600+ successful projects delivered, we transform ideas into scalable products using modern technologies AI/ML, Blockchain, Odoo ERP, Salesforce CRM, SaaS engineering, Web/Mobile development, Cloud Solutions, iGaming, Casino Gaming, and Enterprise Digital Transformation.

We operate across USA, UK, UAE, India, Australia & Canada, empowering startups, growing businesses, large enterprises with flexible development models including Dedicated Teams, Full-Cycle Product Development, IT Outsourcing & Long-Term Engineering Partnerships.

Why Businesses & Investors Choose SDLC Corp

  • 400+ highly skilled developers & delivery experts
  • 1600+ digital products shipped successfully
  • Global delivery with agile sprint execution
  • NDA, IP ownership & compliance-first development
  • Awarded by GoodFirms, DesignRush, TechBehemoths, SoftwareSuggest & Top B2B Listings
  • Rapid scaling ability for enterprise projects
  • 24/7 communication, transparent reporting & milestone-based delivery

Industries

FinTech | Gaming | Healthcare | Logistics | Retail | E-commerce | SaaS | Real Estate | Manufacturing

We focus on quality engineering, security, ROI-focused architecture & long-term digital scalability.

SDLC Corp doesn’t just build software we create digital assets that accelerate revenue, automate operations & strengthen competitive advantage.

A trusted partner for companies aiming to scale faster, innovate smarter & lead in the digital future.

📩 Start your next digital project with us.

Email: kishan@sdlccorp.com

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4.9 (49 review)
415 employees
San Francisco, United States
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Timspark logo

Timspark

Verified

Core Teams for complex builds—custom software, AI/ML, data, cloud, and DevOps.

Timspark is a custom software partner that goes beyond headcount. We curate pre-built Core Teams—architects, engineers, QA, and DevOps with clear ownership—to deliver measurable outcomes, not just CVs. Clients choose us to build modern web and mobile apps, move to cloud-native architectures, implement AI/ML and data platforms, and optimize CI/CD—plus Salesforce integrations and QA. Recent wins span microlearning platforms, cybersecurity scale-ups, IoT telemetry, BIM/point-cloud automation, and pharma analytics. Whether you need team augmentation or end-to-end delivery, we plug in quickly, de-risk execution, and help you scale with confidence.

Services: Custom Software • Team Augmentation • Dedicated/Core Teams • Mobile • Cloud & DevOps • AI/ML & Data • Salesforce • QA & Automation.

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5.0 (3 review)
50 employees
London, United Kingdom
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FuturByte logo

FuturByte

Verified

Anything is Possible!

FuturByte is a custom software and app development company that builds high-performance digital solutions. We develop apps, websites, and web apps designed to solve real business challenges. With a team of skilled developers and over ten years of experience, we specialize in iOS, Android, and cross-platform apps that are scalable, user-friendly, and built for growth.

We serve industries like real estate, healthcare, retail, fintech, education, logistics, transportation, hospitality, entertainment, media, and manufacturing, providing custom apps, websites, and digital solutions for businesses of all sizes.

With a skilled team and over a decade of experience, we specialize in iOS, Android, and cross-platform mobile app development. Our solutions are built for speed, security, and long-term scalability.

Our Expertise

✔️ Ideation & Product Design – From concept to reality.

✔️ Mobile App Development – iOS, Android, and cross-platform apps.

✔️ Software Development – Business solutions tailored to your needs.

✔️ Digital Transformation – Modernizing businesses with technology.

✔️ Data Science & Analytics – Data-driven decision-making.

✔️ Cloud & DevOps – Scalable infrastructure for efficiency.

✔️ Blockchain – Secure and advanced digital solutions.

We help businesses grow with the latest technologies while focusing on quality, efficiency, and long-term success. If you're looking for a reliable technology partner, FuturByte is ready to deliver.

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5.0 (15 review)
250 employees
Dubai, United Arab Emirates
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Infinity Technologies logo

Infinity Technologies

Verified

Ask us how to turn your R&D into ROI

Infinity Technologies, headquartered in London, specializes in creating global R&D hubs to help businesses achieve their goals. Promoting fully remote teams and a lean approach, we eliminate unnecessary office costs, sales, marketing expenses, and overheads for our customers. Our innovative fractal model ensures each R&D hub functions as a self-contained ecosystem tailored to the unique needs of each customer, acting as an extension of their team to develop products, maintain services, or execute strategic objectives.

We leverage over 20 trademarked frameworks for building teams, developing software products, and designing outsourcing strategies, focusing on startups and mid-sized customers. Our goal is to help them globalize their R&D efforts efficiently.

Infinity Technologies also maintains a library of reusable components, enabling rapid prototyping, idea validation, and faster time to market—all while reducing costs.

With our expertise in cost-effective practices, economies of scale, and lean methodologies, Infinity Technologies empowers businesses to innovate, grow, and succeed in a global marketplace.

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4.9 (2 review)
65 employees
Greater London, United Kingdom
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Athlon logo

Athlon

Verified

We build digital products that users love. The first time. The right way. Every time.

At Athlon, we specialize in transforming the digital landscape for businesses aiming to excel in a rapidly evolving market. We are a dynamic digital product design and development firm committed to crafting bespoke solutions that drive growth, enhance user engagement, and optimize operational efficiencies.

What We Solve: In a world where technology rapidly reshapes markets, many companies find themselves at a crossroads of needing to innovate while maintaining core business values. Athlon steps in as a strategic partner, helping businesses navigate this transformation. We address critical challenges such as:

  • Enhancing digital presence through cutting-edge web and mobile applications.
  • Streamlining business processes with tailor-made software solutions.
  • Overcoming scalability limits in project delivery with augmented team support.

Our Solutions: Our approach is comprehensive—beginning with a deep understanding of our clients’ industries, competitors, and unique challenges. We offer:

  • Digital Transformation Consulting: Guiding companies through digital transitions, ensuring they leverage technology to its fullest potential.
  • Product Design & Development: Creating aesthetically pleasing and functionally robust products that resonate with end-users.
  • Strategic Partnerships: Acting not just as a service provider, but as a partner who aligns with client goals for long-term success.

Strategic Approach: We view each project through a strategic lens, ensuring that every solution not only meets immediate needs but also positions our clients for future growth. Our methodology encompasses:

  • In-depth discovery phases to fully understand the unique challenges and opportunities within each industry.
  • Agile development practices tailored to each client’s timeline and budget.
  • Continuous support and iteration to keep our clients ahead in their markets.

Why Athlon? With Athlon, businesses gain more than just a service provider—they secure a partner who is deeply invested in their success. Our expertise spans across various sectors, enabling us to serve startups, scale-ups, and established enterprises alike. Whether it’s enhancing your digital footprint or revolutionizing your product offerings, Athlon is here to ensure your venture thrives in the digital era.

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5.0 (4 review)
65 employees
Greater London, United Kingdom
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epicX logo

epicX

Verified

Scale your Tech Teams with Pre-Vetted and Battle-Tested Talent and Avail Upto 65% Cost Savings

epicX is a leading provider of tech talent, staff augmentation, and offshore software development services, empowering startups to scale with speed, efficiency, and confidence. Founded in 2021, epicX was built by founders, for founders - with a mission to simplify the way early-stage and growth-stage companies access world-class engineering talent without the complexity of traditional hiring.

At epicX, we connect you with top 5% pre-vetted developers from Pakistan and South Africa, two emerging hubs of skilled, cost-effective tech talent. Our engineers are carefully handpicked for their technical excellence, startup experience, and ability to deliver results fast. Whether you need to hire one exceptional developer or assemble a fully dedicated remote team, epicX offers a flexible, scalable solution designed to integrate seamlessly into your workflow.

We specialize in staff augmentation and dedicated remote teams, working closely with non-technical founders, solo product owners, and lean startup teams to fill talent gaps, accelerate development, and reduce overhead costs. Our developers become true extensions of your team - not freelancers or vendors - but trusted partners who take ownership, communicate proactively, and align with your goals.

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5.0 (4 review)
200 employees
London, United Kingdom
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Magora logo

Magora

Verified

PRODUCT DEVELOPMENT TAILORED FOR YOUR BUSINESS

Magora is an AI, Web & Mobile product consultancy that offers digital services to businesses across a broad range of industries, including Healthcare, Education, Retail, eLearning and eCommerce. Whether a custom AI product, B2C or a B2B project, iOS or Android app, first of all, we take the time to understand your goals, your product and the end-user’s needs. Our software development cases are loved by users for their convenience and appreciated by customers for the real value they add to your business.

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5.0 (6 review)
49 employees
London, United Kingdom
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