We’ve researched and ranked the best California 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 HTML5 Mobile App Development Agencies in California

10 Companies - Rankings updated: September 05, 2026

Each agency listed on DesignRush is assessed for industry expertise and customer testimonials are evaluated in order to provide you with a vetted selection. Certain listings represent paid partnerships.

HTML5
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$10,000 - $25,000
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  • HDWEBSOFT

    Bring your vision to life

    HDWEBSOFT is a leading software outsourcing company in Vietnam, known for its high-quality services, affordable pricing, and reliable team. With over 250 experienced engineers and a decade of expertise, HDWEBSOFT has helped businesses of all sizes from around the world to develop and launch successful...

    Top Services:

    • Web Development
    • eCommerce Development
    • IoT
    • Mobile App Development
    • Software Development
    • Show more
    Location
    Pasadena, California
    Number of Employees
    250 - 499
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    12 Projects Listed

    HDWEBSOFT Services

    • Web Development
    • eCommerce Development
    • IoT
    • Mobile App Development
    • Software Development
    • Big Data Analytics
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • vTech
    • Toku
    • Logi
    • TripScout
    • PushPress
    • Trustify
    • SkyLab
    • Speek
    • Instantly
    • ANX
    Data sourced from the agency's DesignRush profile

    HDWEBSOFT Reviews & Testimonials

    • Jason Harvison
      Jason Harvison CEO at Elevate
      5.0 ★

      Web Development Review from Jason Harvison

      HDWEBSOFT did a fantastic work that aided the client in expanding their business, particularly in terms of growing website subscriptions. The project began on schedule and opened up a lot of opportunities for the business.

    • David Zalik
      David Zalik CEO at Greensky
      5.0 ★

      Web Development Review from David Zalik

      Using a smooth user interface, HDWEBSOFT effectively updated our landing page, enticing visitors to sign up for the product's waitlist. The staff provided a customized strategy and was incredibly responsive, driven, and enthusiastic. They also used ClickUp for project administration.

    • Max Levchin
      Max Levchin Co-Founder & CEO at Affirm
      5.0 ★

      Mobile App Development Review from Max Levchin

      We've partnered with HDWEBSOFT who have created our app using .NET. The feedback from our customers we've received has been overwhelmingly good. We had heard positive things about the idea even before we released the app, so it's encouraging to see those comments continue once it has been out. HDWEBSOFT was set up from the start. The design team was outstanding; they completed the job on schedule and within our allocated budget. They followed a well-defined procedure that was in place.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    5.0 5.0 (31)
    4.7 4.7 (36)

  • DreamzTech Solutions

    Hire World-Class Developers.

    Outsource Your Software Development Services to DreamzTech, the 10 Yrs.+ Exp. Award-Winning Software Design & Development Company based in USA, UK, India & South Africa. Hire World-Class Offshore Developers at $20/HR trusted by Startups, SMBs to Fortune 500 Brands. Get a 15 Days Free Trial!...

    Top Services:

    • Software Development
    • Web Development
    • Mobile App Development
    • Blockchain
    • AI Development
    • Show more
    Location
    San Francisco, California
    Number of Employees
    250 - 499
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    8 Projects Listed

    DreamzTech Solutions Services

    • Software Development
    • Web Development
    • Mobile App Development
    • Blockchain
    • AI Development
    • IoT
    • UI/UX Design
    • Big Data Analytics
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Nestle Purina
    • DHL
    • Close Brothers
    • FLSmidth
    • Byju's
    • First Tennessee
    • Reader's Digest
    • Deluxe
    • Liqui Moly
    • Stanford University
    Data sourced from the agency's DesignRush profile

    DreamzTech Solutions Reviews & Testimonials

    • K C Jones
      K C Jones Owner at Pro Fantasy Rodeo
      5.0 ★

      Web Development Review from K C Jones

      It’s been really amazing since the time we have been involved with DreamzTech. We have been doing a lot and would not have been able to make it without the support from DreamzTech. We have achieved our goals, accomplished a lot of things. I just want to put this note for this possible team partnership with this big US firm that has a long long way to go.

    • Peter Johnson
      Peter Johnson Director at 123Claim
      5.0 ★

      Software Development Review from Peter Johnson

      DreamzTech Solutions came highly recommended to us and now we know why. With a narrow timeframe, they delivered a website software solution that far exceeded our expectations and works exceptionally well for our company. We had previously worked with many other companies , but DreamzTech is different in true sense. They not only develop, they support as a real tech partner.

    • Corey Pierce
      Corey Pierce CEO at Owners Path
      5.0 ★

      Software Development Review from Corey Pierce

      We are working with DreamzTech for last 5 years. Their team leaders and developers are really talented and dedicated. We are working with the same team lead and development team since starting, This is rare! I give a 5-star rating to this long-term relationship where I can genuinely depend on them and get 100% quality delivery.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.8 4.8 (5)

  • UVIO

    Carefully devised digital products that strengthen your brand

    Full cycle UX/UI design and development studio that crafts comprehensive digital experiences for the real users...

    Top Services:

    • Web Design
    • eCommerce Development
    • Web Development
    • WordPress Website Design
    • Mobile App Development
    • Show more
    Location
    San Diego, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    1 Project Listed

    UVIO Services

    • Web Design
    • eCommerce Development
    • Web Development
    • WordPress Website Design
    • Mobile App Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • AirCanada
    • Uber
    • Forbes
    • Elevate
    • Evidencity
    • DFinity
    • MSRI
    Data sourced from the agency's DesignRush profile

    UVIO Reviews & Testimonials

    • George Vasyagin
      George Vasyagin CEO at That Company, LLC
      5.0 ★

      iPhone Review from George Vasyagin

      UVIO and the team did fantastic job on doing user-research, project planing and iOS app development. The communication was awesome and the work was planned well, completed on time and within the budget. Couldn't be more happy.

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

  • Grazitti Interactive

    Marketing For Digital Natives

    Grazitti Interactive, a global leader in digital innovation, offering AI-driven solutions to drive customer success. We specialize in Salesforce, marketing automation, analytics, and more, partnering with industry giants to deliver results-oriented solutions for clients...

    Top Services:

    • Graphic Design
    • Video Production
    • Web Design
    • Web Development
    • Digital Marketing
    • Show more
    Location
    Mountain View, California
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    11 Projects Listed

    Grazitti Interactive Services

    • Graphic Design
    • Video Production
    • Web Design
    • Web Development
    • Digital Marketing
    • SEO
    • Mobile App Development
    • eCommerce Development
    • eCommerce
    • Software Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Awid
    • Biogen MA, Inc
    • Bulamu Healthcare International
    • Calypso
    • CBR Systems Inc (AMAG Pharmaceuticals)
    • Connexity UK Limited
    • Convert Digital
    • Devex
    • Didax Inc,
    • Evoke Group LLC
    Data sourced from the agency's DesignRush profile

    Grazitti Interactive Reviews & Testimonials

    • Rida Khan
      Rida Khan Owner at Undisclosed
      5.0 ★

      Email Marketing Review from Rida Khan

      This is the second company I've worked with Grazitti at and both experiences have been positive. Their team is able to turn around our requests very quickly and has provided good best practices from their work with other clients. I'd recommend them for the Marketing services.

    • Patricia Lughezzani
      Patricia Lughezzani Group Vice President of Customer Support & Advocacy at Marketo
      5.0 ★

      Web Design Review from Patricia Lughezzani

      Grazitti and Marketo Support have successfully partnered to roll out rich functionality and support Portal. Beyond core development skills to implement business functionally in SFDC Service Cloud and Customer Community, the Grazitti team has been a valued contributor to recommend technology such as Solr text search, workflow optimizations, and web creative design.

    • David Skyberg
      David Skyberg Product Manager at Ping Identity
      5.0 ★

      Digital Marketing Review from David Skyberg

      Right from start the Grazitti team gave us the confidence that we do not need to have a plan B. Once things started rolling – they were able to accommodate a number of requirements that were made by the operating teams within the timeframe.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.8 4.8 (5)
    4.3 4.3 (387)

  • Developer Bazaar Technologies

    AI-Native Product Engineering Company

    Developer Bazaar Technologies is a Top AI Development company building custom Mobile App & Software Development and specializing in building AI Solutions delivering mesurable outcome...

    Top Services:

    • Mobile App Development
    • eCommerce Development
    • Software Development
    • IT Services
    • Staff Augmentation
    • Show more
    Location
    Fremont, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    6 Projects Listed

    Developer Bazaar Technologies Services

    • Mobile App Development
    • eCommerce Development
    • Software Development
    • IT Services
    • Staff Augmentation
    • AI Development
    • CRM Consulting
    • Software Testing
    • Wearables
    • ERP Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • upGrad
    • InfoBeans
    • Low's Pro Supply
    • GPT Group
    • 2030 Ventures
    • Kwiki Sweeps
    • Creative soul
    • Disruptors Capital
    • ASTE Motori
    Data sourced from the agency's DesignRush profile

    Developer Bazaar Technologies Reviews & Testimonials

    • Sakshi Jain
      Sakshi Jain Sales Manager at Heliverse Technologies
      5.0 ★

      Mobile App Development Review from Sakshi Jain

      We collaborated with Developer Bazaar Technology to build an on-demand service app and were impressed by their expertise, timely delivery, and seamless communication. Using Flutter, they developed a user-friendly, feature-rich app tailored to our needs, with excellent post-launch support ensuring smooth operations. The app has enhanced our efficiency and customer satisfaction, and we highly recommend them for quality app development.

    • SHIVMOHAN MISHRA
      SHIVMOHAN MISHRA Developer at Tarkik Tech
      5.0 ★

      Mobile App Development Review from SHIVMOHAN MISHRA

      The projects success was evident through several measurable outcomes. Post-launch, we observed a significant increase in user engagement and a growing number of service bookings through the app. User feedback was overwhelmingly positive, highlighting the apps ease of use and the convenience it provided

    • Ashish Sharma
      Ashish Sharma Business development Manager at Oaktree Software pvt ltd
      5.0 ★

      Mobile App Development Review from Ashish Sharma

      We hired Developer Bazaar Technologies to develop a user-friendly and efficient car rental app using Flutter to streamline our car rental operations and enhance customer experience. The scope of work included developing a cross-platform car rental app using Flutter, which involved creating user registration and login features, car listing and booking functionalities, payment gateway integration, real-time GPS tracking, and an admin panel for managing bookings and customer data. Key deliverables included the fully functional app, comprehensive testing, and post-launch support. The measurable outcomes included a significant increase in online bookings, positive user feedback on app usability, and a reduction in manual processing time for car rentals. The app achieved a 4.8-star rating on app stores within the first three months of launch. Their project management was excellent. They delivered all milestones on time and were very responsive to our needs, providing regular updates and promptly addressing any issues that arose during development.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.8 4.8 (7)
    4.8 4.8 (26)

  • The App Founders

    Software, Mobile App, Games Development Company.

    The App Founders is a recognized leader in the mobile app development industry that excels in building mobile apps to upscale your business and bolster your customer retention rate. Well transform your idea into a market-ready application on schedule and within budget...

    Top Services:

    • Mobile App Development
    • Software Development
    • eCommerce Development
    • Product Design
    • CRM Consulting
    • Show more
    Location
    Santa Clara, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $70/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    16 Projects Listed

    The App Founders Services

    • Mobile App Development
    • Software Development
    • eCommerce Development
    • Product Design
    • CRM Consulting
    • ERP Consulting
    • VR/AR
    • Blockchain
    • Cloud Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Airhme
    • Bally
    • Rideo
    • Your Wish On
    • Dragon Force Ninja
    • Tamkeen Care
    • Color Jumper
    • Stacker Cracker
    Data sourced from the agency's DesignRush profile

    The App Founders Reviews & Testimonials

    • Dustin Wheeler
      Dustin Wheeler Review from Google
      5.0 ★

      Dustin Wheeler's Review Sourced from Google

      it was such a pleasure working with App Founders and just how easy and professional they were. I quickly realized how the industry is full of thirsty, needy bots and scammers I’m trying to get your attention, but tons of unsolicited phone calls and texts. Dealing with these guys was a breath of fresh and definitely showed up in value above all the rest.

    • Munna Alam
      Munna Alam Review from Google
      5.0 ★

      Munna Alam's Review Sourced from Google

      Got to say, The App Founders really impressed me! They totally nailed the design for my mobile game. Can't wait to team up with them again to make and promote the game. Definitely recommending them to anyone looking for top-notch game development services!

    • berry paul
      berry paul Review from Google
      5.0 ★

      berry paul's Review Sourced from Google

      The App Founders is able to develop console games and deliver them on time. I have worked with them for a year now and they have never missed a deadline, which is important to me as a developer. The team is friendly, knowledgeable and always willing to help if you need anything.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.1 4.1 (9)

  • ClearSummit

    A senior product team, on subscription.

    Growing companies that need software built well, without hiring a product organization to do it. One subscription, priced by intensity: Automate for recurring manual work, Build for a priority backlog, Guided when there is no product-management layer. Mobile, IoT, cloud, AI...

    Top Services:

    • Mobile App Development
    • Cloud Consulting
    • UI/UX Design
    • Product Design
    • Digital Strategy
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    3 Projects Listed

    ClearSummit Services

    • Mobile App Development
    • Cloud Consulting
    • UI/UX Design
    • Product Design
    • Digital Strategy
    • IoT
    • Web Development
    • Software Development
    • Digital Services
    • Staff Augmentation
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Belkin
    • IPC Corp
    • TuneRegistry
    • Realkey
    • Mitsubishi
    • Sony
    • AvePoint
    Data sourced from the agency's DesignRush profile
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  • Beehive Software

    Reimagining Software Development

    Beehive is a new production model for software development (the world's first we should add) that fuses AI precision with human ingenuity. A model of collective intelligence that breaks projects into microtasks, routing them to global experts, and delivering production-ready, high quality, code faster than...

    Top Services:

    • Web Development
    • Software Development
    • AI Development
    • Mobile App Development
    • IoT
    • Show more
    Location
    San Jose, California
    Number of Employees
    100 - 249
    Minimal Budget
    $10,000 - $25,000

    Beehive Software Services

    • Web Development
    • Software Development
    • AI Development
    • Mobile App Development
    • IoT
    • DevOps Consulting
    • Cloud Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Blue Zones
    • Mars
    • NestHub
    • AEDP Institute
    • Mastering Diabetes
    • Codeop
    • bazarr.ai
    • C.Light Technologies
    Data sourced from the agency's DesignRush profile

    Beehive Software Reviews & Testimonials

    • Paul Cummings
      Paul Cummings Review from Google
      5.0 ★

      Paul Cummings's Review Sourced from Google

      Beehive Software is simply the best technology partner I have ever worked with. What started as a limited bespoke consumer mobile app SOW quickly grew into more full-scale consumer digital experience support. At the time of this writing, Beehive has delivered 3 major mobile app upgrades for Blue Zones, developed an Online Assessment Portal to support health and wellness survey delivery, and delivered an Analytics PaaS for our enterprise. We have been extremely fortunate to work with top talent like Yaron Hadad and Mor Yariv on our project; their leadership, creativity and partnership IQ have been through the roof. Whether a startup, mid-size, or enterprise-grade customer, Beehive's model allows for scale and delivery support that is really unprecedented in terms of both resource quantity and quality; and it is elastic in a way that benefits their partners. They're really just the bee's knees (pun intended) - and any partner looking to develop exciting and engaging consumer experiences, science-based health and wellness experiences, end-to-end data capture and analytics experiences... hell, *any* experience... would be well-served to consider Beehive Software to be their partner.

    • Diana Fosha
      Diana Fosha Review from Google
      5.0 ★

      Diana Fosha's Review Sourced from Google

      an extraordinary collaboration with the AI-developing team at Beehive. respectful, responsive, going out of their way to understand the specifics of our world in the design of the software. i would give them six stars

    • Jonathan Faran
      Jonathan Faran Review from Google
      5.0 ★

      Jonathan Faran's Review Sourced from Google

      Beehive Software is probably the best solution you can get. First of all, the core team - led by Yaron - is one of the most professional in the market, guaranteed. Second, their dedication to delivering an exceptional product on time is truly impressive. Their responsiveness alone speaks volumes. The system they’ve built is also incredibly unique, offering a brilliant way to make development not only faster but also significantly more cost-effective. We've used both their products and services across different parts of our development process, and they’ve proven to be outstanding. We highly recommend Beehive Software to anyone - from small startups to large companies - who want to avoid hiring an entire dev team and instead use a smart, ready-made solution.

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

  • MobMaxime

    Top Mobile App and Web Development Company in Canada, USA and UK

    We design highly polished iPhone, Android and Web Apps for startups and Enterprise clients...

    Top Services:

    • Mobile App Development
    • Web Development
    • UI/UX Design
    • IoT
    • Digital Marketing
    • Show more
    Location
    Sunnyvale, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $15/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    3 Projects Listed

    MobMaxime Services

    • Mobile App Development
    • Web Development
    • UI/UX Design
    • IoT
    • Digital Marketing
    • Software Development
    • Web Design
    • eCommerce Development
    • SEO
    • Software Testing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Bacsoft
    • Ziptask
    • Clementine
    Data sourced from the agency's DesignRush profile
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  • TechnoBrains Business Solutions

    Empowering Businesses Through Innovative Software Development

    TechnoBrains Business Solutions is a global software development and AI solutions company founded in 2009, delivering custom web, mobile, AI, and enterprise software solutions for startups, SMEs, and established enterprises worldwide. Headquartered in Ahmedabad, India, with a presence in the United States...

    Top Services:

    • AI Development
    • Mobile App Development
    • Software Development
    • eCommerce Development
    • Web Development
    • Show more
    Location
    San Francisco, California
    Number of Employees
    50 - 99
    Minimal Budget
    $10,000 - $25,000

    TechnoBrains Business Solutions Services

    • AI Development
    • Mobile App Development
    • Software Development
    • eCommerce Development
    • Web Development
    • ERP Consulting
    • DevOps Consulting
    • IT Compliance Solution
    • Cloud Consulting
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • eCommerce Industry
    • Fintech Industry
    • Health Care Industry
    Data sourced from the agency's DesignRush profile

    TechnoBrains Business Solutions Reviews & Testimonials

    • Amee Brahmbhatt
      Amee Brahmbhatt Review from Google
      5.0 ★

      Amee Brahmbhatt's Review Sourced from Google

      I have been working with TechnoBrains, and it has been a great experience overall. The company focuses not only on delivering quality work but also on the continuous growth of its employees. Regular sessions on the latest skills and technologies help us stay updated and improve professionally. Additionally, festival celebrations and team activities create a positive and engaging work environment. It’s a great place to learn, grow, and be part of a supportive team.

    • kalgi mavani
      kalgi mavani Review from Google
      5.0 ★

      kalgi mavani's Review Sourced from Google

      Working at TechnoBrains as a Business Development Manager has given me great exposure to technical domains such as AI, open-source technologies, and modern development frameworks. The technical team is knowledgeable, supportive, and always open to collaboration, which makes delivering client solutions smooth and effective.

    • Vrushika Makwana
      Vrushika Makwana Review from Google
      5.0 ★

      Vrushika Makwana's Review Sourced from Google

      Technobrains Business Solutions is more than just an IT company – it's a strategic partner committed to empowering businesses through technology.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.8 4.8 (26)

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