Best Custom Software Development Companies in the USA

At LenGreo, we focus on delivering custom software and web development solutions tailored to each client’s specific goals. While our offices are based in Amsterdam and Kharkiv, a significant part of our work is dedicated to supporting businesses in the USA. We collaborate closely with American startups, mid-sized companies, and growth-stage enterprises, helping them build digital products that are functional, scalable, and aligned with their market needs.

Our development process is structured around understanding the unique challenges of each project. We begin with a discovery phase to define clear objectives, then move into UX/UI design, prototyping, and development. By using technologies like JavaScript and WordPress, we create flexible solutions that can be easily adapted to the evolving needs of U.S.-based businesses. We also offer ongoing post-launch support to ensure everything continues to run smoothly.

In addition to development, we provide lead generation and digital marketing services tailored to the American market. From refining Ideal Customer Profiles to launching SEO and paid campaigns, we help our U.S. clients stand out in competitive landscapes. Our integrated approach ensures that what we build is not only technically sound but also positioned for real-world results.

Hoofdzaken:

• We serve clients across the U.S. with a remote-first, globally connected team
• Our workflow includes discovery, prototyping, development, QA, and ongoing support
• We use modern technologies like JavaScript and WordPress for versatile builds
• We offer full post-launch support, including migrations and fine-tuning
• We combine web development with strategic marketing for performance-focused results

Services:

• Ontwikkeling van aangepaste websites
• UX/UI-ontwerp
• WordPress-ontwikkeling
• Webflow-ontwikkeling
• Shopify-ontwikkeling
• Kwaliteitsverzekering
• Post-Launch Maintenance & Support
• Leadgeneratie
• Digitale marketing
• SEO-diensten
• Contentmarketing
• Betalen per klik (PPC)

Contacts:

• Website: Lengreo
• E-mail: hallo@lengreo.com
• Telefoonnummer: +31 686 147 566
• LinkedIn: Lengreo
• Instagram: @lengreo
• Twitter: @Lengreo

Our cases

SEO for BIM & VDC Services Provider

PPC For Adult Content Platform

Biological Age Blood Testing Kit

ELEKS is a software engineering and consultancy company that supports businesses across various industries with product design, development, and delivery. Founded in 1991, the company offers expertise in areas such as data science, cybersecurity, and agile transformation, helping organizations innovate and improve operational efficiency. ELEKS operates globally, including an office presence in the United States, providing technology solutions tailored to evolving business needs.

The company works with advanced technologies like artificial intelligence, machine learning, blockchain, and the Internet of Things. Its services cover a broad range of software development stages, from proof of concept to cloud migration and enterprise application integration. ELEKS also provides advisory consulting on sustainability, technical feasibility, and digital transformation to help businesses adapt to changing market demands.

Hoofdzaken:

• Expertise in software engineering and consultancy for diverse industries
• Focus on emerging technologies like AI, ML, and IoT
• Global presence including an office in the USA
• Services span from product design to enterprise digital transformation
• Experience in both advisory and engineering services

Services:

• Product design and strategic consulting
• Data science and data strategy consulting
• Cybersecurity solutions
• Agile transformation consulting
• Proof of Concept (PoC) development
• Custom application development and re-engineering
• Cloud migration and enterprise applications
• Software audit, quality assurance, and support
• AI development including generative AI, machine learning, and conversational AI
• Intelligent automation and intelligent document processing
• Business intelligence and data platforms
• DevOps, VR/MR/AR, and Internet of Things integration
• Market research and customer experience consulting

Contacts:

• Website: eleks.com
• Facebook: www.facebook.com/ELEKS.Software
• Twitter: x.com/ELEKSSoftware
• LinkedIn: www.linkedin.com/company/eleks
• Address: 625 W.Adams St., Chicago, IL 60661
• Phone: +1-708-967-4803

Kanda Software is a technology company that specializes in custom software development, cloud engineering, quality assurance, and DevOps services. It focuses on delivering software solutions that support complex and time-sensitive projects, particularly for clients in healthcare, life sciences, fintech, and other industries. Kanda’s approach integrates domain expertise with agile development methods, emphasizing secure and scalable software architectures while maintaining client intellectual property protection.

The company provides a broad range of technical skills and adapts to project needs by offering flexible resource scaling and specialized expertise, including AI, machine learning, and DevOps. Kanda collaborates closely with clients, especially in digital transformation efforts, helping to modernize legacy systems, accelerate cloud adoption, and enhance operational efficiency through data-driven strategies.

Hoofdzaken:

• Close collaboration between delivery managers and client product owners to ensure project alignment
• Flexible scaling of teams and technical resources according to project demands
• Focus on integrating AI, machine learning, and DevOps expertise when required
• Experience in digital transformation and cloud modernization
• Commitment to secure handling of client intellectual property
• Proven track record with clients in healthcare and life sciences sectors

Services:

• Maatwerk softwareontwikkeling
• Ontwikkeling van mobiele applicaties
• UX/UI-ontwerp
• Digitale Transformatie
• Cloud Engineering
• DevOps-diensten
• Kwaliteitsborging en testen
• Gegevensanalyse
• AI and Machine Learning
• Onderhoud en ondersteuning

Contacts:

• Website: www.kandasoft.com
• E-mail: contact@kandasoft.com
• Twitter: x.com/kandasoftware
• LinkedIn: www.linkedin.com/company/kanda-software
• Address: 115 W 18th St., 2nd Floor New York, NY 10011
• Phone: 617-340-3850

10Pearls is a global digital development company focused on product design, software development, and technology acceleration. The company supports businesses in navigating complex digital projects through a combination of strategy, agile delivery, and technical expertise. Their teams work across multiple continents, offering services that span from initial concept validation to full product launch and ongoing support.

The company integrates AI and machine learning into various industry solutions, including healthcare, fintech, and energy, to enhance business processes and customer experiences. With a broad geographical presence, they maintain a diverse workforce and emphasize security, compliance, and scalable solutions tailored to industry needs.

Hoofdzaken:

• Expertise in artificial intelligence, machine learning, and data-driven solutions
• Focus on agile delivery and product development aligned with business goals
• Global team distributed across North America, South America, Europe, and Asia
• Strong emphasis on security and compliance in regulated industries
• Experience across multiple sectors including healthcare, fintech, energy, and telecom
• Provides case studies showing practical applications like automated telehealth deployments and AI-powered facial recognition

Services:

• Product development and innovation
• Digital transformation consulting
• Agile team management and delivery
• Software development and quality assurance
• Enterprise platform implementation
• Cloud migration and infrastructure services
• AI and machine learning integration
• DevOps and security operations
• Salesforce and data platform integration

Contacts:

• Website: 10pearls.com
• E-mail: info@10pearls.com
• Facebook: www.facebook.com/10Pearls
• Twitter: x.com/TenPearls
• LinkedIn: www.linkedin.com/company/10pearls
• Address: 8614 Westwood Center Dr, Ste 540 Vienna, VA 22182
• Phone: (703) 935-1919

BairesDev is a technology services company specializing in software development with a focus on nearshore talent. The company connects clients to a large pool of software engineers skilled in various programming languages and frameworks. Its approach emphasizes collaboration, flexibility, and aligning with client time zones to facilitate smooth communication and project execution. BairesDev works with a diverse range of industries, supporting projects from startups to established corporations.

The company offers a comprehensive range of technology services including custom software development, quality assurance, and AI and data science solutions. Their teams work on both front-end and back-end systems, mobile applications, UX/UI design, and infrastructure management. BairesDev’s development process includes discovery calls to understand client needs, quick team onboarding, and ongoing progress tracking to adapt to changing requirements.

Hoofdzaken:

• Access to a broad network of nearshore software engineers across many technology stacks
• Experience supporting clients in diverse industries and company sizes
• Emphasis on timezone alignment for effective collaboration
• Strong focus on quality assurance and reliable delivery
• Engagement models ranging from individual engineers to multi-team projects
• Recognition in industry awards and rankings

Services:

• Custom Software Development (front-end and back-end)
• QA and Testing (manual and automated)
• Artificial Intelligence and Data Science solutions
• Mobile Application Development for iOS and Android
• UX/UI-ontwerp
• Platform, Infrastructure, DevOps, and Security engineering

Contacts:

• Website: www.bairesdev.com
• Facebook: www.facebook.com/bairesdev
• Twitter: x.com/bairesdev
• LinkedIn: www.linkedin.com/company/bairesdev
• Instagram: www.instagram.com/bairesdev
• Address: 1401 Chain Bridge Road McLean, VA USA
• Phone: +1 (408) 478-2739

Brocoders is a software development company that supports SaaS products and midsize businesses with a wide range of technical services. With a focus on long-term partnerships, they work with clients from early MVP stages through to full product development, providing support at various stages of a product’s lifecycle. Their team collaborates closely with clients to align technical solutions with specific business goals, often tailoring their approach to meet the unique challenges of each industry they serve.

The company has experience across sectors including agritech, fintech, ride-sharing, foodtech, and events management. Their work often centers around custom development projects, where they build scalable solutions and optimize workflows for better efficiency. By integrating modern tools and frameworks like React, Node.js, and Amazon Web Services, Brocoders delivers products that are designed to fit the operational needs of their clients.

Hoofdzaken:

• Offers end-to-end support from ideation to full product delivery
• Experience working with startups and established midsize businesses
• Builds solutions for a variety of industries including fintech and agritech
• Uses modern development frameworks and cloud technologies
• Emphasizes close collaboration and ongoing communication with clients

Services:

• MVP development
• Product development and re-engineering
• Dedicated development teams
• Digital transformation and workflow optimization
• DevOps and software testing
• Team augmentation for ongoing projects

Contacts:

• Website: brocoders.com
• E-mail: talk@brocoders.team
• Facebook: www.facebook.com/brocoders
• Twitter: x.com/brocoders_com
• LinkedIn: www.linkedin.com/company/brocoders
• Instagram: www.instagram.com/brocoders__com
• Address: Sakala tn 10, Kesklinna linnaosa, Harju maakond 10116 Tallinn, Estonia
• Phone: +3 726 028 547

ScienceSoft is a software consulting and development company with decades of experience supporting businesses in building digital solutions across multiple platforms. Founded in 1989, the company brings together technical expertise and industry insight to deliver tailored software products and services. ScienceSoft operates globally and works with clients from a wide range of sectors, including healthcare, banking, manufacturing, retail, telecoms, logistics, and professional services.

Their approach to development emphasizes structured project planning, secure delivery, and adaptability to business needs. From building enterprise applications to modernizing legacy systems and implementing cloud solutions, ScienceSoft helps organizations address technical challenges and improve operational efficiency. The company also integrates emerging technologies such as AI, blockchain, IoT, and computer vision into their offerings to support innovation and long-term growth.

Hoofdzaken:

• Structured project management practices from scoping to reporting
• ISO 9001 and ISO 27001 certified for quality and security standards
• Portfolio includes development of high-scale applications such as Viber
• Focus on long-term client relationships through transparent collaboration

Services:

• Maatwerk softwareontwikkeling
• Software Consulting
• IT Outsourcing
• Application Services
• Testing and QA
• Data Analytics and Big Data
• Infrastructure and Cloud Services
• Cyberbeveiliging
• AI and Machine Learning
• Blockchain-oplossingen
• IoT Integration
• Computer Vision and Mixed Reality Solutions

Contacts:

• Website: www.scnsoft.com
• E-mail: contact@scnsoft.com
• Facebook: www.facebook.com/sciencesoft.solutions
• Twitter: x.com/ScienceSoft
• LinkedIn: www.linkedin.com/company/sciencesoft
• Address: 5900 S. Lake Forest Drive, Suite 300 McKinney, Dallas area, TX-75070
• Phone: +1 214 306 68 37

The Software House is a Poland-based software development company that works with CTOs and product teams to accelerate digital product delivery. The company focuses on helping organizations improve the speed and quality of their software development through team augmentation, modernization efforts, and AI adoption. Their approach is rooted in collaboration, with an emphasis on integrating seamlessly with clients’ in-house teams to support ongoing product evolution.

With experience in both established systems and emerging technologies, The Software House supports clients in building and refining digital products. They offer technical consulting, product design, and engineering services that span web and mobile platforms. The company is also engaged in re-architecting legacy systems, optimizing cloud infrastructure, and guiding clients through AI-related development efforts.

Hoofdzaken:

• Works closely with CTOs, product teams, and technical leaders
• Provides both team augmentation and full product team setups
• Supports long-term collaboration through integrated project delivery
• Offers expertise in both modern frontend and backend technologies
• Collaborates with clients from diverse industries across Europe and beyond

Services:

• Team Augmentation
• Dedicated Product Teams
• Web- en mobiele ontwikkeling
• Productontwerp
• AI and Generative AI Development
• Data-engineering
• App Modernization
• Cloud Strategy and Migration
• AWS Consultancy
• Performance and Observability Optimization
• Accessibility Reviews
• Rapid Prototyping and Acceleration Sprints

Contacts:

• Website: tsh.io
• E-mail: hello@tsh.io
• Facebook: www.facebook.com/TheSoftwareHousePL
• Twitter: x.com/RealTSH
• LinkedIn: www.linkedin.com/company/the-software-house
• Address: ul. Dolnych Wałów 8
 Gliwice, Poland

Vention is a software development company with a focus on long-term partnerships across a wide range of industries. Based in New York and operating globally, Vention supports early-stage startups, established enterprises, and companies integrating artificial intelligence. The company takes a structured approach to development, starting with discovery and team assembly, followed by a rapid kickoff process and flexible scaling options. This enables clients to maintain momentum while accessing specialized technical skills.

The company works with businesses across multiple sectors including fintech, healthtech, and ecommerce. Their engineering teams have contributed to projects that include user interface design, backend development, mobile applications, and system integrations. With a remote-first model and a focus on integrating with internal teams, Vention is known for maintaining long-term collaborations and adapting to the evolving needs of its clients.

Hoofdzaken:

• Offers software development services for startups and enterprises
• Provides flexible staffing and delivery models
• Experience in over 30 industries and 25+ technology stacks
• Long-term relationships with clients across diverse sectors
• Emphasis on integration with internal client teams

Services:

• webontwikkeling
• Mobile development
• AI and big data solutions
• Cloud services and infrastructure
• Blockchain and AR/VR technologies
• Dedicated development teams
• Project-based delivery
• Salesforce services
• Product strategy and discovery for startups

Contacts:

• Website: ventionteams.com
• E-mail: hello@ventionteams.com
• Twitter: x.com/ventionteams
• LinkedIn: www.linkedin.com/company/ventionteams
• Instagram: www.instagram.com/ventionteams
• Address: 575 Lexington Avenue, 14th Floor
NY 10022, Phone: 718 374 5043
• Phone: +1 (718) 374-5043

Azumo is a software development company established in 2016, with headquarters in San Francisco. The company specializes in nearshore software development, focusing on building intelligent applications across various platforms. Azumo’s team operates remotely, primarily from Latin America, allowing for collaboration within similar time zones.

The company offers services in artificial intelligence, data engineering, mobile and web development, and cloud solutions. Azumo’s approach includes staff augmentation, dedicated development teams, and project delivery management, catering to the specific needs of its clients.

Hoofdzaken:

• Founded in 2016, headquartered in San Francisco.
• Remote-first company with developers primarily in Latin America.
• Specializes in nearshore software development.
• Offers services in AI, data engineering, mobile and web development, and cloud solutions.
• Provides staff augmentation, dedicated teams, and project management services.

Services:

• Artificial Intelligence and Machine Learning Development
• Maatwerk softwareontwikkeling
• Mobile App Development for iOS and Android
• Data Engineering and Pipeline Construction
• Game Development using Unity or Unreal
• Chatbot-ontwikkeling
• DevOps and Cloud Services for AWS, Azure, and GCP

Contacts:

• Website: azumo.com
• Facebook: www.facebook.com/azumohq
• Twitter: x.com/azumohq
• LinkedIn: www.linkedin.com/company/azumo-llc

Closeloop Technologies is a software development and technology consulting firm that provides end-to-end digital solutions to businesses across a range of industries. With a focus on custom software and product engineering, the company supports clients through every stage of their digital transformation journey. The team combines technical expertise with a consultative approach, helping businesses address complex challenges through tailored technology strategies.

The company offers services that span software engineering, cloud and data solutions, and enterprise system integration. It also provides virtual CTO support and combines onshore and offshore delivery models to meet diverse operational needs. Closeloop Technologies works with organizations of various sizes, contributing to the development of digital products and business applications designed for scalability and efficiency.

Hoofdzaken:

• Offers technology solutions for startups, SMBs, and enterprises
• Provides both on-premise and remote technical expertise
• Emphasizes collaborative partnerships with clients
• Operates globally with multiple office locations
• Focuses on combining strategy, engineering, and implementation

Services:

• Maatwerk softwareontwikkeling
• Cloud Engineering
• Data-engineering
• Native App Development
• Salesforce Implementation
• NetSuite Implementation
• Digital Commerce Solutions
• Generative AI
• System Integration
• Product Strategy and Consulting

Contacts:

• Website: closeloop.com
• E-mail: sales@closeloop.com
• Facebook: www.facebook.com/closelooptechnologies
• Twitter: x.com/closeloop_tech
• LinkedIn: www.linkedin.com/company/closeloop-inc-
• Instagram: www.instagram.com/closeloop_tech
• Address: 2672 Bayshore Parkway #532 Mountain View, CA 94043
• Phone: (+1) 650-266-7175

Brainhub is a software engineering agency that collaborates with tech-driven companies to develop and modernize digital products. Established in 2015, the company focuses on delivering tailored software solutions by embedding its engineers directly into client teams. Brainhub emphasizes quick onboarding, collaborative development, and creating long-term value through code quality and architectural foresight.

With experience across a range of industries, Brainhub has supported both startups and established organizations in building web, mobile, and desktop applications. The agency is particularly known for its expertise in modern technologies such as React, Node.js, .NET, and AWS. Its approach includes agile delivery models and flexible team scaling, allowing clients to adapt development capacity as needed.

Hoofdzaken:

• Offers team augmentation with vetted software engineers
• Collaborates closely with clients for seamless integration
• Emphasizes maintainability, performance, and scalability
• Experience working with legacy systems and modern tech stacks
• Supports fast project kickoff with structured onboarding

Services:

• Webontwikkeling
• Ontwikkeling van mobiele apps
• Ontwikkeling van desktop-apps
• Cloudtechniek en DevOps
• Modernisering van verouderde apps
• Generatieve AI-ontwikkeling
• Software Architecture
• Kwaliteitsverzekering
• Personeelsuitbreiding
• UX/UI-ontwerp
• Discovery Workshops

Contacts:

• Website: brainhub.eu
• E-mail: sales@brainhub.eu
• Facebook: www.facebook.com/brainhubapps
• Twitter: x.com/Brainhubeu
• LinkedIn: www.linkedin.com/company/brainhub-pl
• Address: 25 SE 2nd Ave Ste 550 PMB 1203 Miami, FL 33131 United States
• Phone: +48 733 707 758

Itransition is a global software engineering company that has been delivering digital solutions for over two decades. The company supports businesses across a variety of industries by developing and integrating technology designed to meet specific operational needs. Its expertise spans both enterprise and consumer applications, with a focus on creating systems that help organizations streamline processes, manage data effectively, and improve decision-making.

The company works with clients across the globe, offering a wide range of software services backed by ongoing collaboration and long-term partnerships. From modernizing IT infrastructures to implementing intelligent automation, Itransition helps businesses adapt to technological changes while maintaining operational stability. Its approach includes not just software development but also advisory services and comprehensive support through every phase of the project lifecycle.

Hoofdzaken:

• Operates globally with a distributed team of engineers
• Works with clients in multiple industries, including retail, healthcare, and finance
• Emphasizes long-term partnerships and continuous development
• Provides support for cloud environments, application security, and software integration
• Runs dedicated R&D labs focused on innovation and technology advancement

Services:

• Application development and integration
• Software product engineering
• Application security and QA testing
• Data-analyse en business intelligence
• Intelligent automation solutions
• IT infrastructure management and DevOps
• Technology advisory and digital transformation support

Contacts:

• Website: www.itransition.com
• E-mail: info@itransition.com
• Facebook: www.facebook.com/Itransition
• Twitter: x.com/itransition
• LinkedIn: www.linkedin.com/company/itransition
• Address: 160 Clairemont Ave, Suite 200, GA 30030
• Phone: +1 720 207 2820

MojoTech is a software development company that focuses on building custom digital products through a combination of strategy, engineering, and design. With an emphasis on driving innovation and measurable results, the company works with clients across various industries to create solutions that help them adapt to evolving market demands. MojoTech’s approach is centered on collaboration and understanding client needs, ensuring that each project supports long-term goals and user satisfaction.

The company operates across several U.S. cities, offering services to both established enterprises and newer ventures. Its work spans from helping businesses modernize existing systems to building entirely new digital experiences. By integrating strategy and technology, MojoTech aims to support organizations through every phase of product development – from early-stage planning to implementation and refinement.

Hoofdzaken:

• Focuses on integrating strategy, design, and engineering in product development
• Offers solutions across finance, healthcare, retail, and energy sectors
• Emphasizes long-term collaboration and client team enablement
• Develops both customer-facing platforms and internal business tools
• Partners with companies to support digital transformation initiatives

Services:

• Software-engineering
• UI/UX and CX Design
• AI and Machine Learning Consulting
• Gegevens en analyses
• Ontwikkeling van mobiele applicaties
• Cloud and Application Modernization
• Product and Strategy Acceleration

Contacts:

• Website: www.mojotech.com
• Twitter: x.com/mojotech
• LinkedIn: www.linkedin.com/company/mojotech
• Address: 79 Madison Ave. 8th Floor New York, NY 10016

Pell Software is a U.S.-based custom software development company that specializes in building tailored digital solutions for businesses across a wide range of industries. The company focuses on creating software that integrates seamlessly into a business’s operations, emphasizing transparency, collaboration, and long-term partnerships. Their team works directly with clients to develop custom tools that address unique operational needs, without relying on off-the-shelf products.

Operating entirely within the United States, Pell Software offers services geared toward businesses looking to modernize their processes, enhance connectivity between systems, or develop new digital products. Their work includes both standalone software and integration with existing platforms and tools. Pell Software also emphasizes flexibility in their development process, offering modular approaches to help companies launch projects more efficiently.

Hoofdzaken:

• U.S.-based team focused on transparency and direct collaboration
• Tailored software solutions designed to align with specific business goals
• Long-term partnership approach with ongoing support and maintenance
• Experience with modernizing legacy systems and automating business processes
• Custom integrations with both commercial and proprietary platforms

Services:

• API and system integrations
• Web portals and dashboards
• SaaS integrations
• Business process automation
• App modernization
• Consulting, discovery, and strategy
• eCommerce platform development
• Ongoing software maintenance and support

Contacts:

• Website: www.pellsoftware.com
• E-mail: contact@pellsoftware.com
• Facebook: www.facebook.com/pellsoftware
• Twitter: x.com/PellSoftware
• LinkedIn: www.linkedin.com/company/pell-software
• Address: Pell Software, LLC 1312 17th Street Suite 585 Denver, CO 80202
• Phone: (720) 504-1112