Best US Cross-Platform App Development Companies

956 Companies - Rankings updated: September 04, 2026

Every agency on DesignRush meets evaluation criteria around expertise and client feedback to empower informed choices. Some listings include paid partnerships.

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United States × Cross-Platform Mobile App Development × Sort by: Avg Hourly Price: Low to High × Clear Filters

  • Black Airplane

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

    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
    View Profile
    4.9 4.9 (27)

  • LKICORP

    Precise Engineering. Here.

    Precise Engineering. Here.

    At LKICORP®, we provide expert engineering services to clients across a range of industries. Our team of skilled engineers has experience in mechanical, electrical, and environmental engineering, among others. We work closely with our clients to understand their unique needs and develop customized solutions...

    Top Services:

    • Mobile App Development
    • Software Testing
    • VR/AR
    • Blockchain
    • Software Development
    • Show more
    Location
    Pittsburgh, Pennsylvania
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $300/hr
    Minimal Budget
    $50,000 & Up
    View Profile

  • DECOSTA Global

    Achieving the Unachievable.

    Achieving the Unachievable.

    We create and manage the world's most iconic brands. Brand and product agency that delivers heroic work and legendary clients. DECOSTA has worked with clients in a wide range of industries including entertainment, consumer goods, technology, energy, finance, and more...

    Top Services:

    • Digital Services
    • Branding
    • Creative Services
    • Product Design
    • Digital Strategy
    • Show more
    Location
    Burbank, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $300/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    6 Projects Listed
    View Profile
    5.0 5.0 (1)

  • SGS Technologies

    Value. Innovation. Experience.

    Value. Innovation. Experience.

    We provide technology-driven software and application development solutions...

    Top Services:

    • Mobile App Development
    • Web Development
    • UI/UX Design
    • eCommerce Development
    • Software Development
    • Show more
    Location
    Jacksonville, Florida
    Number of Employees
    50 - 99
    Average Hourly Rate
    $1000/hr
    Minimal Budget
    $1,000 - $10,000
    View Profile

  • Veritis Group Inc

    Your Trusted Technology Partner

    Your Trusted Technology Partner

    Veritis Group Inc is a global IT consulting and services company delivering digital, cloud, and data driven solutions. With expertise in AIOps, MLOps, DevOps, cloud computing, data management, and managed IT services, Veritis helps organizations modernize and improve efficiency...

    Top Services:

    • Managed Services
    • Mobile App Development
    • UI/UX Design
    • Cloud Consulting
    • AI Development
    • Show more
    Location
    Irving, Texas
    Number of Employees
    100 - 249
    Average Hourly Rate
    $1000/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    1 Project Listed
    View Profile
    4.2 4.2 (31)

  • Tech Centera

    Automation That Thinks

    Automation That Thinks

    TechCentera is an AI automation and custom software engineering firm serving mid-market and enterprise operators in logistics, healthcare, and real estate across the US. We engineer custom ERPs, CRMs, AI receptionists, mobile and web applications, with full IP transfer, no per-seat pricing, and delivery...

    Top Services:

    • AI Development
    • Software Development
    • Mobile App Development
    • Web Development
    • CRM Consulting
    • Show more
    Location
    Wilmington, Delaware
    Number of Employees
    100 - 249
    Average Hourly Rate
    $5000/hr
    View Profile

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