We’ve researched and ranked the best United States HTML5 mobile app development agencies that build sophisticated and high-quality apps that help brands drive more loyal customers and sales. Compare listings by past work, reviews, cost and size to pick the best fit for you.

Best US HTML5 App Development Agencies

2 Companies-Rankings updated: September 03, 2026

All agencies on DesignRush undergo evaluation based on professional expertise and verified client reviews. Please note that certain placements are paid partnerships.

HTML5
Public Administration
$10,000 - $25,000
Sort by: Sponsored
United States × HTML5 Mobile App Development × Public Administration × $10,000 - $25,000 ×Clear Filters

  • ThirdEye Data

    Transforming Enterprises with AI Applications

    ThirdEye Data Transforms Enterprises with Data & AI Solutions & Services. ThirdEye Data leverages Artificial Intelligence & Data technologies to build AI applications for enterprises worldwide...

    Top Services:

    • AI Development
    • Big Data Analytics
    • Software Development
    • IT Services
    • Staff Augmentation
    • Show more
    Location
    San Jose, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $55/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    23 Projects Listed

    ThirdEye Data Services

    • AI Development
    • Big Data Analytics
    • Software Development
    • IT Services
    • Staff Augmentation
    • DevOps Consulting
    • Cloud Consulting
    • Mobile App Development
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Microsoft Corp
    • Walmart
    • AWS
    • SCE
    • XPERI
    • Texisle
    • Glastrosch
    • British Petroleum
    • CRC
    • Google
    Data sourced from the agency's DesignRush profile

    ThirdEye Data Reviews & Testimonials

    • Matt Singer
      Matt Singer CEO at Ecotrak
      5.0★

      Big Data Analytics Review from Matt Singer

      ThirdEye helped analyzing data and recommending architecture for enhanced analytics. They understood our business needs really well and went above and beyond to deliver what we were looking for.

    • Kumar Mankala
      Kumar Mankala Former Advisor of the AI/ML Program and Products at SCE
      5.0★

      Software Development Review from Kumar Mankala

      ThirdEye developed CV ML models to automate image quality assessment for Field Asset Inspection (part of Wildfire Mitigation Program). The team delivered the models in time, was able to adapt to changing requirements.

    • Erhan Erdem
      Erhan Erdem Review from Google
      1.0★

      Erhan Erdem's Review Sourced from Google

      I did a voice study for them almost two months ago, still waiting for my payment. I contacted them multiple times and they don't even respond. What a joke.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit WebsiteView Profile
    4.5 4.5 (2)
    3.0 3.0 (2)

  • Fynydd LLC

    We are a software design & development company.

    We solve problems through purpose-built apps, websites, and platforms. We're experienced in UI/UX design, website development, desktop and mobile app development, APIs, generative AI solutions, and cloud services. Our UI design and software development experts work with your team to achieve your business...

    Top Services:

    • AI Development
    • Mobile App Development
    • Software Development
    • Web Design
    • UI/UX Design
    • Show more
    Location
    King of Prussia, Pennsylvania
    Number of Employees
    Under 49
    Average Hourly Rate
    $135/hr
    Minimal Budget
    $10,000 - $25,000

    Fynydd LLC Services

    • AI Development
    • Mobile App Development
    • Software Development
    • Web Design
    • UI/UX Design
    • Web Development
    • eCommerce Development
    • Cloud Consulting
    • IT Services
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • U.S. Bancorp
    • Red Hat Software
    • Pfizer
    • Saint-Gobain
    • U.S. Dept. of Justice
    • Heinz
    • The Vanguard Group
    • New Relic
    • Merck Sharp & Dohme
    • Philadelphia Scientific LLC
    Data sourced from the agency's DesignRush profile

    Fynydd LLC Reviews & Testimonials

    • David Sonn
      David Sonn Review from Google
      5.0★

      David Sonn's Review Sourced from Google

      Fynydd is a team of very talented problem solvers, keenly skilled in delivering technology solutions. We flat out trust them. The applications, websites, and software they build are rock solid. And, they stand behind their work. In a world where the codebase could be faulty and you wouldn't even know it until it's far too late, Fynydd is the choice that brings peace of mind. #BeyondJustCoders

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit WebsiteView Profile
    5.0 5.0 (1)

Related Mobile App Development Specializations in the US

Popular Services

Latest Trends Related to HTML5 Mobile App Development

iPhone vs Android Statistics
App Development

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

20,352
Mobile App Development AI Tools
App Development

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

38,794
No-Code App Builders
App Development

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

26,961

ReceiveFreeProposals

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