Top Mobile App Development Companies in Greenwich, Connecticut

RNO1

Verified

RNO1 is a Global Branding, UX & Digital Growth Partner. Creating Radical Digital Experiences™.

5.0(5)

5.0

5 reviews

RNO1 is a Global Branding, UX & Digital Growth Partner. We build Radical Digital Experiences™ for VC-backed startups, public companies, and Fortune 500s across every medium — making your brand presence compound revenue instead of leaking it. Operating as a continuous, embedded digital partner—deploying senior, cross-functional teams to architect market dominance for Founders, C-Suite, and Product teams. Every medium your market interacts with — your website, product, digital campaigns, and sales assets — is an immediate and ruthless signal of your market value. When elite design and messaging are calibrated to your audience and unified by a cohesive brand strategy, credibility scales and revenue compounds. When execution misses the mark or the brand is fragmented, every interaction contradicts the last — and revenue leaks at every stage. We reverse-engineer your goals, deeply understand your audience, and embed as a true partner to produce tangible results — typically starting with brand strategy and then subsequently aligning website(s), product(s), content, and marketing channels to drive market growth. Let's Create Radical Digital Experiences™

Crush and Lovely

Crush & Lovely is a digital product development agency specializing in mobile and web applications for health, media,...

4.7(1)

4.7

1 review

Crush & Lovely is a digital product development agency specializing in mobile and web applications for health, media, and social impact organizations. They develop photo-heavy apps like National Geographic's mobile magazine experience, create digital tools such as Rooms To Go's sofa configurator, and build platforms for clients including the American Heart Association, Doctors Without Borders, and Triller's music video app.

OSMOS

Verified

Turning Startups into Buisnesses, and Buisnesses into Disruptors

5.0(10)

5.0

10 reviews

At OSMOS, we’re your partners in building scalable products and standout brands. Based in New York City, we specialize in custom app development, brand strategy, and growth marketing, helping startups and enterprises create products that not only work but also thrive. Our Distinctly Human approach ensures every app is user-centric and deeply aligned with a compelling brand identity. From defining your brand to launching growth-driven apps, we build with the future in mind, positioning you to scale and succeed in competitive markets. We help startups at every stage with: Strategic Branding That Resonates Go-to-Market & Growth Strategies Experiential Web Design UI/UX Ai Implementation Partner with OSMOS to bring your vision to life and establish a brand and product that genuinely connect with users. Let’s build something remarkable.

Automatic Technology Solutions is a results-driven IT and marketing company helping businesses grow through intelligent digital transformation. We specialize in combining advanced technologies with strategic marketing to deliver measurable business outcomes. Our services include custom software development, AI-powered solutions, performance marketing, SEO optimization, and scalable e-commerce systems. What sets us apart is our ability to bridge the gap between technology and growth. We don’t just build solutions — we create systems that attract customers, increase conversions, and drive long-term revenue. With experience working across international markets including the US, Dubai, and Africa, we bring a global perspective to every project while adapting strategies to local business needs. Our approach is simple: data first, execution fast, results measurable. Whether you're a startup looking to launch or an established company aiming to scale, we provide the tools, strategy, and execution to move your business forward.

Zfort Group

Zfort Group is a versatile IT services provider specializing in custom software development, AI solutions, and web ap...

4.7(1)

4.7

1 review

Zfort Group is a versatile IT services provider specializing in custom software development, AI solutions, and web applications. With a focus on innovation and quality, the company is dedicated to helping businesses enhance their operations and drive growth through advanced technology.

Vention

Engineering peace of mind

As a software development company with 20+ years in the field, Vention provides innovative services to startups and large enterprises. The company tackle projects of any complexity and size, delivering outstanding solutions that help clients focus on business expansion and new opportunities. With 3K+ dedicated developers globally, Vention match clients with top engineering talent in time zones that align seamlessly with their unique needs. The company’s impressive track record: • Over 500 industry-leading clients, including PayPal, IBM, Mount Sinai, PwC, and Postman. • Contributions to client acquisitions exceeding $15B. • Clients typically save up to $600K annually. • An average client relationship of more than 36 months, demonstrating consistently high client satisfaction. • The longest client engagement has lasted 16 years. Vention provides end-to-end software development expertise, covering the full engineering spectrum—from initial concept creation to final delivery and optimization: - Custom software development - AI software development - Web and mobile development - QA and testing - Cloud & DevOps - Blockchain - AR/VR

BlueLabel

Blue Label is an award-winning, remote-first team of 100+ strategists, designers, and developers.

4.7(1)

4.7

1 review

Blue Label is an award-winning, remote-first team of 100+ strategists, designers, and developers. We’re based all over the world, with offices in New York City, Seattle, and San Francisco.

Top Notch Dezigns

Verified

Top Notch Dezigns is a custom web design and digital marketing agency and its main focus is to boost brands online.

Top Notch Dezigns is a custom web design and digital marketing agency and its main focus is to boost brands online. We design and create custom websites and digital strategies to boost brand awareness and increase leads or sales.

Utility is a New York-based digital products agency specializing in custom mobile app development, digital transformation, and AI solutions. They craft award-winning applications and platforms for enterprises like Airbnb, Forbes, and Samsung, combining strategic design with scalable technology to create innovative user experiences across mobile, web, and emerging technologies.

Rapptr Labs is a digital product development agency specializing in building and scaling mobile apps, web applications, and AI-powered digital experiences. They focus on turning ideas into launch-ready MVPs with interdisciplinary teams covering strategy, design, and engineering, having built over 50 products with a 95% rate of accurate estimates.

Work & Co

Work & Co is a digital product agency that designs and develops flagship digital products for the world's leading bra...

Work & Co is a digital product agency that designs and develops flagship digital products for the world's leading brands. Known for a product-driven approach, the agency has created digital experiences for companies like Apple, IKEA, Marriott, and Gatorade.

noformat

noformat is a strategic creative agency based in NYC that creates digital strategies and experiences for brands and.

noformat is a strategic creative agency based in NYC that creates digital strategies and experiences for brands and startups by combining beautiful design with cutting-edge technology. They specialize in developing mobile apps, website design and development, brand identity systems, and digital product experiences, with notable work including fitness tracking apps, banking website redesigns, and social media platforms.

Simpalm

Award Winning Mobile, App & Web Design Company

5.0(22)

5.0

22 reviews

Simpalm is a leading digital product development company in the USA, specializing in UI/UX design, mobile app development, web development, AI solutions, and SaaS platforms. With offices in Maryland, Chicago and New York, we’ve been building transformative digital solutions for startups, established companies, and nonprofits. Our digital solutions have solved challenges for healthcare, financial services, construction, education, IoT, charities, associations and SaaS industry. Our team of experienced project managers, designers, developers, and testers combines creativity with cutting-edge technology to turn ideas into high-performing apps, websites, and AI-driven systems. We focus on delivering products that enhance efficiency, scalability, and user experience — helping organizations grow faster in today’s digital-first world. With over 400+ successful deployments, Simpalm has become a trusted partner for businesses looking to design, develop, and scale their digital products. Beyond development, we offer continuous support and maintenance to ensure your solution remains secure and future-ready. Our Main Services: Discovery and Design: Define requirements, create wireframes, and design visually engaging UI/UX for your app or website. Custom App Development: Build AI-powered mobile apps using React Native, Swift, Kotlin, and Flutter. Website Design and Development: Craft CMS-based websites in WordPress, Drupal, or Hubspot CMS to represent your brand or organization effectively. Web and SaaS Applications: Develop scalable SaaS or web portals using React, Node.js, .NET, and Python. AI Strategy and Development: Create tailored AI strategies, chatbots, and automation workflows that empower your business. Support and Maintenance: End-to-end technical support to keep your products performing seamlessly. Some of our customers include, Bamboo, WindowNations, Pepsi, AudiobooksNow.

Lickability

Lickability is a mobile app design and development agency that creates iOS, Android, and cross-platform applications.

Lickability is a mobile app design and development agency that creates iOS, Android, and cross-platform applications for startups and Fortune 500 companies. They provide end-to-end services including strategy, user research, UI/UX design, native development, and product management, with notable clients like The Atlantic, Mastodon, and RevenueCat.

Brights

Bright people building bright software

5.0(5)

5.0

5 reviews

Founded in 2011, Brights is a custom software development company headquartered in Warsaw. We build scalable digital products for startups, SMBs, and enterprises, combining strong engineering depth with a genuine partnership mindset. Over 15 years, we've grown into a team of 120+ specialists and delivered 300+ projects for clients in 30+ countries. We hold ISO/IEC 27001 certification, have earned 24 industry awards and recognitions, and maintain a 4.9/5 rating on Clutch — but what we're most proud of is simpler: 70–80% of our clients stay with us well beyond the initial engagement. What We Do: We provide end-to-end software development services across the full product lifecycle: from early-stage idea validation and MVP development to scaling complex enterprise platforms. Our core services include: - Custom web and mobile app development - UI/UX design and product design - AI/ML integration and custom AI development - Cloud engineering and DevOps - SaaS development and consulting - Dedicated development teams and staff augmentation - UX audit and product modernization We work across industries including fintech, insurtech, logistics, edtech, e-commerce, healthcare, real estate, and travel & hospitality. How We Work: At Brights, we act as co-creators — not just executors. Our specialists bring ideas, initiative, and ownership to every engagement. We focus on understanding the business goals behind every project, not just the technical requirements. That means our teams actively contribute to product decisions, suggest improvements, and help clients think strategically about their technology. We offer flexible engagement models to fit different project stages and business needs: Time & Materials, Dedicated Team, Fixed Cost, and milestone-based billing. Our Tech Stack: We work with modern, proven technologies across the full stack: Frontend: React, Vue.js, Angular, Next.js, Nuxt.js Backend: Node.js, NestJS, .NET, PHP, Laravel, GraphQL Mobile: React Native, Swift, Kotlin Cloud & DevOps: AWS, Azure, GCP, Kubernetes AI/ML: Python-based frameworks, custom model integration CMS: Storyblok, Prismic, Strapi What Makes Us Different: Three things define how Brights operates: 1. People first. We hire for depth — our engineers understand systems at a foundational level and can solve hard problems, not just complete tasks. And internally, we invest in each other just as much as we invest in client projects. Strong teams build strong products. 2. High standards, always. We are selective in hiring and demanding in delivery. Our specialists are celebrated for going beyond — because we genuinely believe that transcending limits is what separates good software from great software. 3. Co-creators, not doers. Our average client relationship lasts over three years. That's not an accident — it's the result of treating every engagement as a long-term partnership, not a transaction. Trusted by Leading Brands: We've collaborated with globally recognized organizations including Mastercard, Microsoft, Pepsi, and Danone, as well as Fortune 500 companies such as Coca-Cola, McDonald's, and Kimberly-Clark. We are also proud to be a tech partner of the Serhiy Prytula Charity Foundation, supporting Ukraine's defense and civilian relief efforts. Awards & Recognitions: - Clutch Top 1000 Global Companies 2025 - Top AI Strategy Company 2024 - ISO/IEC 27001:2022 Certified - Storyblok, Hygraph, and Strapi Certified Partner - Top Software Development Company — GoodFirms & The Manifest

Fueled is a digital agency delivering strategic web development, mobile apps, and AI solutions. They specialize in enterprise WordPress development as the top WP VIP partner, award-winning iOS app development, and cutting-edge AI applications including workflow automation and rapid prototyping for clients like Google, New York Times, and Mayo Clinic.

Rexsoft

RexSoft is an international custom software development company with 12+ years of experience specializing in web and.

RexSoft is an international custom software development company with 12+ years of experience specializing in web and mobile app development, IT consulting, and outsourced IT services. They offer ready-made solutions for electric scooter/bike rental businesses and provide bespoke software development across logistics, scooter sharing, and moving industries.

SEM Nexus

SEM Nexus is a mobile app development and marketing agency that builds and markets high-performance mobile applications.

SEM Nexus is a mobile app development and marketing agency that builds and markets high-performance mobile applications using agile development processes. They specialize in App Store Optimization (ASO), data-driven user acquisition, and leverage AI to create mobile experiences that deliver measurable business results for startups and established companies.