Best US Cross-Platform App Development Companies

8 Companies - Rankings updated: September 06, 2026

DesignRush assesses agencies using expertise standards and verified client experiences to help you make better decisions. Certain agencies have paid placements.

Cross-Platform
Legal
$25,000 - $50,000
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United States × Cross-Platform Mobile App Development × Legal × $25,000 - $50,000 × Clear Filters

  • COAX Software

    Verified Verified by the DesignRush team for authenticity and credibility.

    Smart software solutions for travel, transport & logistics

    COAX Software delivers smart software solutions for travel, transport & logisticsconnecting strategy, delivery, and growth to ship reliable, scalable, ROI-positive software...

    Top Services:

    • Web Development
    • Web Design
    • Mobile App Development
    • eCommerce Development
    • UI/UX Design
    • Show more
    Location
    Chicago, Illinois
    Number of Employees
    100 - 249
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    13 Projects Listed

    COAX Software Services

    • Web Development
    • Web Design
    • Mobile App Development
    • eCommerce Development
    • UI/UX Design
    • AI Development
    • IoT
    • Software Development
    • DevOps Consulting
    • Big Data Analytics
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Alertpoint
    • Site Survey
    • SmartBat
    • Taxod
    • MICRM
    • Peercents
    • TRI Timesheets
    • CareZapp
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • Biz4 Group

    Top AI Development Company in USA

    Predominantly known for our AI Chatbots and AI Agents, AI Avatar, and other Enterprise AI solutions, we offer a wide array of AI services that range across the Web, Mobile, and Enterprise niches. Our expertise in data science and AI ranks us among the top AI consultants...

    Top Services:

    • AI Development
    • Software Development
    • Wearables
    • Web Development
    • Web Design
    • Show more
    Location
    Orlando, Florida
    Number of Employees
    250 - 499
    Average Hourly Rate
    $49/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    13 Projects Listed

    Biz4 Group Services

    • AI Development
    • Software Development
    • Wearables
    • Web Development
    • Web Design
    • Mobile App Development
    • UI/UX Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • KalixQC
    • Valinor
    • Facilitor
    • AI driven chatbot
    • Stackr
    • Powder Watts
    • NOV
    • AppWeigh
    • LUMINULTRA
    • HERD LOGIX
    Data sourced from the agency's DesignRush profile

    Biz4 Group Reviews & Testimonials

    • Elizabeth Kupferschmid
      Elizabeth Kupferschmid Independent Contractor at UNSHACKLED of Pacific Garden Mission
      5.0 ★

      Web Development Review from Elizabeth Kupferschmid

      We've had an outstanding experience working with Biz4Group a Top AI Development Company. Their expertise and innovation greatly enhanced our platforms functionality, and the design layout they created for us is both outstanding and elegant. Their team is professional, communicates clearly, and delivers on time. We highly recommend Biz4Group for any businesses looking for Web development along with AI Integration.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.3 4.3 (1)

  • Hivex

    Vetted Devs On-Demand. Scale Team Fast, Risk-Free.

    Hivex is an outstaffing company that offers a full software development lifecycle, from discovery to quality assurance. Our team of experts focuses on technology-intensive industries and stays up-to-date with the latest IT trends, providing the best solutions for companies worldwide...

    Top Services:

    • Software Development
    • Staff Augmentation
    • DevOps Consulting
    • AI Development
    • Blockchain
    • Show more
    Location
    Miami, Florida
    Number of Employees
    100 - 249
    Average Hourly Rate
    $49/hr
    Minimal Budget
    $25,000 - $50,000

    Hivex Services

    • Software Development
    • Staff Augmentation
    • DevOps Consulting
    • AI Development
    • Blockchain
    • Mobile App Development
    • VR/AR
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Legarithm
    • Equeum
    • Logicom
    Data sourced from the agency's DesignRush profile

    Hivex Reviews & Testimonials

    • Margaret N.
      Margaret N. Marketer at Elit-Web
      5.0 ★

      Software Development Review from Margaret N.

      It was a pleasure working with Hivex. They quickly grasped the scope of our project and provided highly skilled developers within days. These engineers were efficient and integrated smoothly into our team. They built a robust remote work system that significantly improved our team's collaboration and productivity. The whole process was smooth, and the results were exactly what we needed.

    • Olena Shabunina
      Olena Shabunina CEO at BrandVox
      5.0 ★

      Software Development Review from Olena Shabunina

      We needed to quickly expand our dev team to build out a new feature set, and Hivex helped us find and bring on skilled remote developers to make that happen. The devs hit every deadline we set, sometimes even early. If we needed changes or had questions, they were super responsive - usually got back to us within a couple hours.

    • Isammara Lourenço
      Isammara Lourenço HR Generalist at Snov.io
      5.0 ★

      Software Development Review from Isammara Lourenço

      We had a temporary gap in our technical team due to some transitions, and we needed to keep our development momentum going strong. Hivex provided us with skilled developers who seamlessly integrated into our team. They had the expertise we needed and filled the gap until we made permanent hires. Our collaboration with Hivex made sure our projects kept going without delay, we didn't lose our development momentum, and there wasn't any disruption. It was a huge help during a challenging time.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.6 4.6 (3)

  • PhoenixBizz

    Software & Mobile App Development Company in Phoenix, Arizona

    PhoenixBizz is a leading Software and Mobile App Development Company in Phoenix, AZ. We can help to build Custom Software for enterprise & startup businesses. PhoenixBizz is an expert in five keys areas of technology, including new Mobile Application Development, Seo Services, Web Design, Digital Marketing...

    Top Services:

    • Web Design
    • Web Development
    • eCommerce Development
    • Mobile App Development
    • Digital Marketing
    • Show more
    Location
    Peoria, Arizona
    Number of Employees
    Under 49
    Average Hourly Rate
    $125/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    10 Projects Listed

    PhoenixBizz Services

    • Web Design
    • Web Development
    • eCommerce Development
    • Mobile App Development
    • Digital Marketing
    • SEO
    • Software Development
    • IoT
    • AI Development
    • VR/AR
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • David K.G. Chan
    • Dana Poole
    • Larry Leal
    • Austin Gurule
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile
    5.0 5.0 (1)

  • Moravio

    We design & develop web and mobile applications. Specializing in outsourcing and AI integration

    We are ready to build your project in the digital world. We will help you through the development process from initial analysis to successful launch. We design, build and launch digital products on mobile, web, and connected platforms...

    Top Services:

    • Software Development
    • AI Development
    • Staff Augmentation
    • Mobile App Development
    • CRM Consulting
    • Show more
    Location
    New York City, New York
    Number of Employees
    50 - 99
    Average Hourly Rate
    $79/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    2 Projects Listed

    Moravio Services

    • Software Development
    • AI Development
    • Staff Augmentation
    • Mobile App Development
    • CRM Consulting
    • ERP Consulting
    • DevOps Consulting
    • Big Data Analytics
    • IT Services
    • Product Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • JLL
    • CENTRL
    • MALL
    • STARDIO
    • Delivery Hero
    • Notino
    • Wallmark
    • Hyundai Transys Czech
    • Czech Tourism
    • Economia
    Data sourced from the agency's DesignRush profile

    Moravio Reviews & Testimonials

    • James Leonard Ehrlich, DVM
      James Leonard Ehrlich, DVM CTO & CEO at VCPR.ORG
      4.8 ★

      Web Development Review from James Leonard Ehrlich, DVM

      I wanted to outsource front end development while maintaining back end services myself. They started with existing React SPAs, cleaned them up, found and removed bugs, improved user interaction, made clear requests for new endpoints which I implemented and they tested and used. The time difference between my office in eastern USA and theirs in Moravia worked well, as we could meet at their afternoon/my morning and I had the rest of the day to deal with back end or questions they might have. Their professionalism and competency were impressive. I will continue working with them, for years, I hope, in maintenance mode or when we need to expand features.

    • Michal Konopa
      Michal Konopa Head of IT at NonStop Consulting
      5.0 ★

      CRM Development Review from Michal Konopa

      New CRM system was successfully rolled out and data was migrated from our old system. Everything was delivered on time. Always willing to adapt to changing needs of the project.

    • Miroslav Cina
      Miroslav Cina Review from Google
      5.0 ★

      Miroslav Cina's Review Sourced from Google

      I had experience for few projects as QA manager and I need to say that Moravio is very progressive company in IT industry.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.4 4.4 (2)
    4.7 4.7 (30)

  • Black Airplane

    Atlanta custom software, AI, product design, web and mobile development - 100% USA-based.

    Black Airplane turns consequential business problems into polished custom software. Our 30+ full-time, 100% USA-based strategists, product designers, and engineers deliver AI solutions, web platforms, and mobile apps used by more than 50 million people each month...

    Top Services:

    • Software Development
    • AI Development
    • UI/UX Design
    • Web Development
    • Mobile App Development
    • Show more
    Location
    Woodstock, Georgia
    Number of Employees
    Under 49
    Average Hourly Rate
    $250/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    3 Projects Listed

    Black Airplane Services

    • Software Development
    • AI Development
    • UI/UX Design
    • Web Development
    • Mobile App Development
    • Product Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Coca-Cola
    • Chick-fil-A
    • The Home Depot
    • IHG
    • The Weather Channel
    • McDonald's
    • SeatGeek
    • Gas South
    • StoneLoads
    • reTHINK Group
    Data sourced from the agency's DesignRush profile

    Black Airplane Reviews & Testimonials

    • Shayne Forsyth
      Shayne Forsyth Review from Google
      5.0 ★

      Shayne Forsyth's Review Sourced from Google

      Black Airplane exceeded our expectations in delivering a top-tier website for TechnoMile. From the very beginning, their team demonstrated exceptional creativity and technical expertise. They approached the project with professionalism and clear communication, keeping us informed at every step. The end result is a visually stunning, high-performing site that reflects our identity and effectively supports our business goals. If you’re looking for a partner who can combine design excellence with virtually flawless execution, Black Airplane is the one to choose.

    • Ginger Jones
      Ginger Jones Review from Google
      5.0 ★

      Ginger Jones's Review Sourced from Google

      Black Airplane has been exceptional to work with! Their team delivered a seamless Stripe integration with impressive speed, ensuring we met our tight deadline. A special shoutout to April, whose responsiveness and dedication have been nothing short of outstanding. She’s truly amazing!

    • Richard Klosa
      Richard Klosa Review from Google
      5.0 ★

      Richard Klosa's Review Sourced from Google

      Top notch team working on a custom software development projects. I worked with Black Airplane (Brandon and David ) through an existing relationship they had with a company we purchased. Communication has been excellent. Both are very responsive and the resulting work has been excellent. Highly recommend.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.9 4.9 (27)

  • LookFar Labs

    We Bring Bold Ideas to Life.

    IT, Software, and Chatbot Solutions to upscale your business. We partner with entrepreneurs and business leaders to design and build transformative technology solutions. By putting business goals first and the technology second, we achieve more impactful outcomes...

    Top Services:

    • IT Services
    • Staff Augmentation
    • Mobile App Development
    • Software Development
    • Show more
    Location
    New Orleans, Louisiana
    Number of Employees
    Under 49
    Average Hourly Rate
    $135/hr
    Minimal Budget
    $25,000 - $50,000

    LookFar Labs Services

    • IT Services
    • Staff Augmentation
    • Mobile App Development
    • Software Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Camp Bow Wow
    • Feels
    • KTM Management
    • OnScene Services
    • MobileQubes
    • Louisiana Thoroughbred Breeders Association
    • MatchPoint
    Data sourced from the agency's DesignRush profile

    LookFar Labs Reviews & Testimonials

    • Shawn Litchfield
      Shawn Litchfield Review from Google
      5.0 ★

      Shawn Litchfield's Review Sourced from Google

      LookFar Labs has been incredible to work with. We have a very complex product/service that they were able to help us move from a tedious manual process to an incredibly user friendly web-based system. We would highly recommend their services to anyone thinking about working with this great company.

    • John Spivey
      John Spivey Review from Google
      5.0 ★

      John Spivey's Review Sourced from Google

      Lookfar has been a pleasure to work with. Smart, business savvy, and passionate about software development. Their approach was spot on and they were able to pivot with us as our goals changed. Truly a great partner and one I highly recommend.

    • Anthony Bodin
      Anthony Bodin Review from Google
      5.0 ★

      Anthony Bodin's Review Sourced from Google

      Truly amazing team! My product wouldn't exist without their dedication. If you're looking for a true partner in developing your software product, Lookfar is your team.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    5.0 5.0 (4)

  • Antino Labs

    Values by Convergence

    We are an AI Consulting and Digital Transformation company that follows a collaborative and data-driven approach to deliver high-quality technology solutions for global enterprises...

    Top Services:

    • Web Design
    • Mobile App Development
    • Software Development
    • Product Design
    • Graphic Design
    • Show more
    Location
    Lewes, Delaware
    Number of Employees
    500 - 999
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000

    Antino Labs Services

    • Web Design
    • Mobile App Development
    • Software Development
    • Product Design
    • Graphic Design
    • Digital Services
    • Logo Design
    • AI Development
    • Blockchain
    • Digital Strategy
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Ontic
    • Rapido
    • Hyderabad Metro Rail
    • Krishify
    • Hoppy
    Data sourced from the agency's DesignRush profile

    Antino Labs Reviews & Testimonials

    • sudeep kotari
      sudeep kotari Review from Google
      5.0 ★

      sudeep kotari's Review Sourced from Google

      Recently I cleared all the interview rounds in this company, unfortunately due to some personal reason didn't join. 2 technical round was very good, interviewers and HR Minnu was very friendly and nice. Definitely 5 star for treating employees and aspirants.

    • Jitendra Gupta
      Jitendra Gupta Review from Google
      5.0 ★

      Jitendra Gupta's Review Sourced from Google

      Antino labs's development is handled by experience developers. This gives best services to the client.This complets milestone before the time. I will say that it is satisfactory organization

    • Prakhar Pandey
      Prakhar Pandey Review from Google
      5.0 ★

      Prakhar Pandey's Review Sourced from Google

      I am working here as an android developer. In a small time I got a great exposure. For the freshesr who want to enhance our skills to next level then Antino Labs is a right organization.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.6 4.6 (68)

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