Top App Maintenance & Support Companies in New York, New York

RNO1

Verified

RNO1 is a Global Branding, UX and Digital Growth Agency for Modern Brands. Creating Radical Digital Experiences™.

RNO1 is a Global Branding, UX and Digital Growth Agency. We partner with the most Radical Brands and Leaders from within VC-backed Startups — to Fortune 500/100’s. Those who seek to reinvent industries, reimagine digital, and rapidly scale. Operating in a super intentional Flexible—Agency Model enabling Founders/C-Suite, Marketing, Product, and Leadership Teams to grow and scale their brands into the future. Our story began on the west coast in 2010. We’ve since grown to become a global agency team supercharged by strategists, designers, developers and marketers at the front-lines of creating Radical Digital Experiences™ that connect and captivate users and customers worldwide. We’re design-led and technology-driven to utilize the most modern approaches, while embracing AI (Artificial Intelligence) to deliver the best CX, and UX, creating impact across platforms and places. Let’s Create Radical, Together.

Entalogics

Verified

Top-tier AI-Augmented Software Development & Cybersecurity Company

Entalogics is an AI-augmented software development and cybersecurity solutions company with 600+ delivered projects for clients across North America, Europe, Middle East, and Asia-Pacific. We cover all major business timezones and work exclusively in English. We commit to fixed-price contracts. No open-ended retainers, no estimate creep. Before any build starts, we scope it precisely: delivery timeline, budget, and feature set are agreed and locked. This is our default engagement model, not a premium option. Every engineer is senior-level. This is a hiring policy, not a sales pitch. No juniors on client projects. The engineer in your scoping call is the engineer building your product. AI is our operating model, not an add-on. Every engineer works inside AI-augmented workflows across the full lifecycle. AI handles boilerplate, testing, and documentation. Engineers handle architecture, business logic, security, and code review. Production-grade output in weeks, not months. Security is built in, not bolted on. Every product we ship goes through threat modeling, secure code review, and pre-launch testing as standard — not as an upsell. We also offer standalone cybersecurity solutions: security audits, penetration testing, and hardening for products built elsewhere. What We Build: * Complex SaaS platforms * AI-powered products (LLM integration, agents, automation) * Custom Chromium browsers (fewer than 10 teams globally with this expertise) * Web apps (React, Next.js, Node, Django, Laravel) * Mobile apps (Flutter, React Native, native iOS/Android) * Desktop applications (Electron, Tauri) * Cybersecurity solutions (audits, penetration testing, secure architecture) * UI/UX design, cloud, and DevOps We rescue projects that have gone wrong. Products damaged by poor engineering and products built with no-code or vibe-coding tools that outgrew what those tools can support. We stabilize, refactor, secure, and bring them to production-grade under a fixed-price scope. Our team augmentation goes further than staffing. Every engineer we place works inside AI-augmented workflows by default. You are not getting extra hands. You are getting engineers who deliver 2-3x the output with documented, maintainable code. Recognized by Clutch, GoodFirms, Upwork and TopDevelopers globally with 5.0 ratings. The scope changes. The standard doesn't.

Sell My Code

Buy and sell source code, apps, SaaS solutions, scripts, and digital products online.

Sell My Code is a leading marketplace where developers, startups, agencies, and entrepreneurs can buy and sell source code, mobile apps, websites, SaaS products, scripts, themes, templates, plugins, and other digital assets. Whether you're a developer looking to earn from your existing projects or a business searching for ready-to-use software, Sell My Code offers a secure, reliable, and easy-to-use platform for seamless transactions. By connecting buyers with skilled creators from around the world, the platform helps businesses save development time, reduce costs, and launch products faster. From MVPs and custom applications to fully featured software solutions, Sell My Code makes it easy to discover, purchase, and sell high-quality digital products in one trusted marketplace.

EltexSoft

Verified

AI-first engineering studio. The seniors who scope your build are the ones who ship it.

EltexSoft is an AI-first software engineering studio. Since 2015 we've built and maintained web, mobile, and AI products for founders and established companies, and we run every engagement with senior engineers who stay on the account for years rather than rotating off after kickoff. We're 35 to 50 people across Los Angeles, New York, and Kyiv. The engineer who scopes your project is the one who ships it, so context compounds instead of resetting each quarter. That continuity is why our client relationships are measured in years. What we build: ✓ Full-stack web (Laravel, Python, React, Node) ✓ Native mobile (iOS and Android) ✓ AI and generative-AI features, in production ✓ QA, DevOps, and CI/CD ✓ Senior staff augmentation for teams that need capacity fast Where we work: real estate, healthcare, sports, food delivery, e-commerce, fintech, and education, from platforms under heavy production load to consumer apps with millions of installs. We've been AI-first since 2021, when we started with AI-assisted test coverage because quality is how we compete. Today AI runs through every workflow: research, architecture, code review, testing, and shipping. Rated 5.0 on Clutch. Expert-Vetted (top 1%) on Upwork. If you want a team that writes maintainable code, tells you the truth, and is still there long after launch, that's us.

Simpalm

Verified

Award Winning Mobile, App & Web Design Company

5.0(3)

5.0

3 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.