Best US Cross-Platform App Development Companies

9 Companies - Rankings updated: September 03, 2026

Each agency undergoes DesignRush evaluation for professional expertise and genuine client satisfaction to assist your search. Some featured placements are paid.

Cross-Platform
Public Safety
Budget
Sort by: Sponsored
United States × Cross-Platform Mobile App Development × Public Safety × Clear Filters

  • Edvantis

    Let's Create Digital Success Together!

    Edvantis is a data, AI & software engineering partner with over 400 talented professionals operating in Central & Eastern Europe and the USA...

    Top Services:

    • Software Development
    • AI Development
    • Big Data Analytics
    • Staff Augmentation
    • Mobile App Development
    • Show more
    Location
    New York City, New York
    Number of Employees
    250 - 499
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    12 Projects Listed

    Edvantis Services

    • Software Development
    • AI Development
    • Big Data Analytics
    • Staff Augmentation
    • Mobile App Development
    • IT Services
    • Cloud Consulting
    • Software Testing
    • Cybersecurity
    • eCommerce Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Indeed
    • Kardex Remstar
    • Freenet Group
    • DocCirrus
    • TrustRadius
    • Modulsystem Sweden
    • ATRON
    • COLLENDA
    • SEMDATEX
    • KPC Labs
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile
    4.2 4.2 (5)

  • Codebludev

    Mission-Critical Software Engineering & AI Development Firm

    Mission-critical software engineering firm in Cincinnati, OH. Founded by an active firefighter and paramedic from the NYC 911 system. We build custom software, mobile apps, and AI platforms for organizations where system failure is not an option...

    Top Services:

    • Software Development
    • Mobile App Development
    • Web Development
    • WordPress Website Design
    • eCommerce Development
    • Show more
    Location
    Cincinnati, Ohio
    Number of Employees
    Under 49
    Portfolios Count
    3 Projects Listed

    Codebludev Services

    • Software Development
    • Mobile App Development
    • Web Development
    • WordPress Website Design
    • eCommerce Development
    • Web Design
    • AI Development
    • CRM Consulting
    • Software Testing
    • Blockchain
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Mendel Rosenblum
    • FCNJ
    • Life Town
    • Beit Chabad South Beach
    • Biago Custom
    • Hamilton County Police Association Charitable Foun
    • Village Of Golf Manor
    Data sourced from the agency's DesignRush profile

    Codebludev Reviews & Testimonials

    • Andrew Rogerson
      Andrew Rogerson Architect at Garvin Design Group
      5.0 ★

      Software Development Review from Andrew Rogerson

      Codeblu Dev delivers high-quality work in a time-efficient manner. Not only does the team possess good communication skills, but they also exercise initiative when issues arise. They are a knowledgeable partner who is committed to building long-term working relationships.

    • Martin Macmillan
      Martin Macmillan CEO/Founder at Pollen VC
      5.0 ★

      Software Development Review from Martin Macmillan

      Codebludev was able to take our vision and help us deliver an app that empowers retail shareholders to make their voices heard. Theyve brought a depth and breadth of technical expertise and user experience design to challenge us on our assumptions on how people would want to interact with the app. From a mobile development perspective, we wanted to go to market with both an Android and an iPhone simultaneously.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.5 4.5 (2)

  • Novacomp

    Specialized in Methodologies, Products & Services

    Novacomp is a leading regional IT services company with over 25 years of experience assisting businesses in their digital transformation through solutions such as IT outsourcing, dedicated teams, IT consulting, staff augmentation, QA and software testing, app development, cloud services and more...

    Top Services:

    • Software Development
    • Mobile App Development
    • Software Testing
    • IT Services
    • Staff Augmentation
    • Show more
    Location
    Miami, Florida
    Number of Employees
    500 - 999
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    5 Projects Listed

    Novacomp Services

    • Software Development
    • Mobile App Development
    • Software Testing
    • IT Services
    • Staff Augmentation
    • Cybersecurity
    • UI/UX Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Banistmo
    • Grupo ICE
    • Banco Popular
    • Seguro Social de Costa Rica
    • Scotiabank
    • Banco Lafise
    • Davivienda
    • Instituto Costarricense de Electricidad
    • Bomberos de Costa Rica
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • 3 Sided Cube

    We build mobile apps, web platforms & AI workflows for organisations doing good in the world.

    3 Sided Cube is a global mobile app and digital development company with a passion for Tech For Good, championing the genius over the generic to build life-saving, life-changing digital solutions...

    Top Services:

    • Mobile App Development
    • Software Development
    • Web Development
    • AI Development
    • Digital Services
    • Show more
    Location
    St. Petersburg, Florida
    Number of Employees
    50 - 99
    Average Hourly Rate
    $150/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    5 Projects Listed

    3 Sided Cube Services

    • Mobile App Development
    • Software Development
    • Web Development
    • AI Development
    • Digital Services
    • UI/UX Design
    • Digital Strategy
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • American Red Cross
    • Surfers Against Sewage
    • Omaze
    • Vodafone | Glastonbury Festival
    • LUSH
    • Global Forest Watch
    • The World Resources Institute
    • University Of Bristol
    • GDPC
    • Wonderbly
    Data sourced from the agency's DesignRush profile

    3 Sided Cube Reviews & Testimonials

    • Si Muddell
      Si Muddell Review from Google
      4.0 ★

      Si Muddell's Review Sourced from Google

      Fantastically positive and driven team who on every interaction you just know care deeply about a) what they do b) what they deliver and c) ultimately the experience the end user will have. Hugely impressed with their personal, creative and energy driven approach at the pitch stage, I commissioned 3SC to help us better scope an app. Their task was to take an in-house developed app prototype, and turn it into a fully fledged technical specification with user stories, MoSCoW prioritisation, costs, and an updated look and feel; all done with audience need at the heart. Myself and the wider team have nothing but very good things to say about 3SC. When reflecting on an agency to work with, loads say they can do it, some can actually do what they say they can do, even less do it in the spirit of real partnership and mutually respect/drive. 3SC do all of these excellently. I highly recommend them.

    • Oliver Morrison
      Oliver Morrison Review from Google
      5.0 ★

      Oliver Morrison's Review Sourced from Google

      A passionate team of insanely talented experts, producing industry leading technology for good causes. Highly recommend.

    • Kev Borrill
      Kev Borrill Review from Google
      5.0 ★

      Kev Borrill's Review Sourced from Google

      Great Digital agency with a passion for making great mobile apps in the Tech for good industry

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.5 4.5 (12)

  • ATS Media Group

    Leading Internet Web Agency Based In New York.

    ATSMG serves as your exclusive provider for tailor-made designs, hosting, SaaS solutions, branding services, and a comprehensive array of offerings. Additionally, ATSMG offers a self-service platform for businesses and e-commerce ventures, empowering you to take charge of your digital needs...

    Top Services:

    • Digital Services
    • Graphic Design
    • Branding
    • Creative Services
    • Logo Design
    • Show more
    Location
    New York City, New York
    Number of Employees
    Under 49
    Average Hourly Rate
    $120/hr
    Minimal Budget
    Under $1,000
    Portfolios Count
    1 Project Listed

    ATS Media Group Services

    • Digital Services
    • Graphic Design
    • Branding
    • Creative Services
    • Logo Design
    • Web Design
    • UI/UX Design
    • eCommerce Development
    • WordPress Website Design
    • Web Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Law Offices Of Frances Nicotra, Esq
    • XSBUILDER
    • Travel Ads Pro
    • VecTech Solutions, LLC.
    • SecuredStore
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • Forge Studio

    Senior Product Designers Embedded in Your Team — Design Systems, Staff Augmentation, and Zero-to-One

    Forge Studio places senior product designers (L4-L6 caliber) from Coinbase, Roblox, and Instacart directly into your team. Embedded design teams, enterprise design systems, and zero-to-one product design. $9.5M+ in engagements since 2017...

    Top Services:

    • UI/UX Design
    • Web Design
    • Product Design
    • Digital Strategy
    • AI Development
    • Show more
    Location
    San Francisco, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $200/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    2 Projects Listed

    Forge Studio Services

    • UI/UX Design
    • Web Design
    • Product Design
    • Digital Strategy
    • AI Development
    • Software Development
    • Mobile App Development
    • Web Development
    • Branding
    • Logo Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Instacart
    • Coinbase
    • Roblox
    • DoorDash
    • Affirm
    • Robinhood
    • Cruise
    • Airtable
    • Guideline
    • Grammarly
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • ALFATEK

    High-Level Technology for Small and Large Business.

    ALFTEK offers full-service network infrastructure, system administration, network security, software development and other managed IT services. What's more, the company also integrates robust software solutions with cloud-based SaaS, PaaS and IaaS platforms for website and social & blog design...

    Top Services:

    • Software Development
    • Cybersecurity
    • IT Services
    • Managed Services
    • Web Design
    • Show more
    Location
    Concord, California
    Number of Employees
    Under 49
    Portfolios Count
    4 Projects Listed

    ALFATEK Services

    • Software Development
    • Cybersecurity
    • IT Services
    • Managed Services
    • Web Design
    • IoT
    • Mobile App Development
    • Big Data Analytics
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Consultary
    • iBookingVIP
    • MONXPERT
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • 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
    Visit Website View Profile
    5.0 5.0 (4)

  • Devout Tech Consultants

    Best Top-Rated Website & Mobile App Development Company.

    We are an innovative, top-rated Website, Mobile &software development company specialising in the creation and design of web-based applications, websites, and mobile solutions (iOS, Android, React Native, and hybrid). Our primary expertise lies in collaborating closely with clients to transform their ideas...

    Top Services:

    • Web Design
    • Web Development
    • Mobile App Development
    • Digital Marketing
    • Social Media Marketing
    • Show more
    Location
    Waterloo, Iowa
    Number of Employees
    50 - 99
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000

    Devout Tech Consultants Services

    • Web Design
    • Web Development
    • Mobile App Development
    • Digital Marketing
    • Social Media Marketing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Paysley
    • Clarksin
    • USEO
    • STI
    • CMES Robotics
    • Beckett Corp
    • Filmhimmelen
    • Lexion
    • Puma
    • Virtual Community Risk Reduction
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

Related Mobile App Development Specializations in the US

Popular Services

Latest Trends Related to Cross-Platform Mobile App Development

iPhone vs Android Statistics
App Development

iPhone vs. Android: 60+ Key Market Statistics Every Business Should Know

20,355
Mobile App Development AI Tools
App Development

I Tested the Top 5 Mobile App Development AI Tools: Here’s What Stood Out

38,795
No-Code App Builders
App Development

Top 5 No-Code App Builders Reviewed — Which One Came Out on Top?

26,962

Receive Free Proposals

For your project

1

Specify your budget, timeline and project requirements

2

Our experts curate a list of up to 5 most qualified candidate agencies

3

We connect you with them so you can choose the most suitable partner

Specify your requirements