Best California Flutter Development Companies

3 Companies - Rankings updated: August 20, 2026

We evaluate every agency on DesignRush according to expertise credentials and client satisfaction ratings. Some placements are sponsored.

United States × California ×
  • Vention

    Verified Verified by the DesignRush team for authenticity and credibility.

    Engineering peace of mind

    Vention builds custom software across fintech, healthtech, and eCommerce, for clients like ClassPass, Mount Sinai, and Slice. Its ISO 27001-certified team serves 30+ industries and over 500 clients. With 20+ years of experience, the software development firm is best for businesses needing scalable...

    Location
    San Francisco, California
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    15 Projects Listed

    Vention Services

    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Software Testing
    • Web Development
    • Blockchain
    • AI Development
    • Cloud Consulting
    • CRM Consulting
    • Cybersecurity
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • IBM
    • PayPal
    • Cuvva
    • Costa Coffee
    • Memrise
    • Urban
    • Tailored Dog Food Delivery
    • RealVNC
    • Label on a Cable
    • ClassPass
    Data sourced from the agency's DesignRush profile

    Vention Reviews & Testimonials

    • Lee Tupper
      Lee Tupper CTO at Remotiv (formerly Financial Soundings)
      3.8

      Mobile App Development Review from Lee Tupper

      Vention has delivered excellent design prototypes and accurate time estimates. The app is still in beta mode, and the partnership with [...] Vention will [continue] until the release of the next version. Vention is a reliable team that offers quality service. (Verified via email)

    • Jon Wade
      Jon Wade CTO & Founder at Union54
      5.0

      Staff Augmentation Review from Jon Wade

      Vention’s efforts allowed the successful development of the product, resulting in new customers. They provided backend developers, business analysts, UI designers, and QA testers to develop our solution. Vention cultivated a seamless partnership through constant updates and a collaborative approach. Overall, their team’s well-rounded expertise was impressive.

    • AJ Canty
      AJ Canty CTO and Co-Founder at Primer
      5.0

      Web Development Review from AJ Canty

      We’ve been working with Vention for quite some time and consider them an extension of our team, rather than an offshore vendor. We needed solid mobile developers to work with our in-house engineers to build our Primer SDKs on both mobile platforms. This was not a trivial thing as it required a lot of cross-functional communication, but the Vention team was up to the challenge. They quickly adopted the best practices we follow at Primer and proved to be effective and proactive.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Accelerate Your Roadmap & Drive Innovation

    At Rootstrap, we help companies scale people, processes, and products through outcome-driven development. We’ve helped launch more than 750+ digital products with more than 100 million combined downloads...

    Location
    Los Angeles, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $87/hr
    Portfolios Count
    8 Projects Listed

    Rootstrap Services

    • Mobile App Development
    • Software Development
    • Web Development
    • AI Development
    • Software Testing
    • Blockchain
    • Web Design
    • Staff Augmentation
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • WalletJoys
    • MasterClass
    • Ownable
    • Generis
    • TONY ROBBINS COACHING EMPIRE
    • Merry Jane
    • Google Opus
    • Globalization Partners
    Data sourced from the agency's DesignRush profile

    Rootstrap Reviews & Testimonials

    • Bridget Garcia
      Bridget Garcia Chief Marketing Officer at Undisclosed
      4.0

      Enterprise Review from Bridget Garcia

      We needed a new website for our business and we knew it was time to update the design and make it more user friendly. Rootstrap helped us create our site with all of the latest technology and they were very flexible in terms of our requests. Award winning work! Kudos.

    • Ori Goldman
      Ori Goldman Co-Founder at Loftey
      5.0

      Web Development Review from Ori Goldman

      When I was looking to build my MVP I spoke to about 10 shops. Little did I know that I would still be working with that same company over 5 years later. Rootstrap built our MVP and we have stuck with them ever since. Through multiple pivots, design changes, thousands of implemented features, we still feel lucky that we found them 5 years ago.

    • Pete Ghiorse
      Pete Ghiorse CEO/Founder at GiveTide
      5.0

      HTML5 Review from Pete Ghiorse

      Rootstrap is the real deal. We've worked with them on our app from day one. From the first napkin sketch through V2 of our app, Rootstrap has been one of the most reliable value-producing companies I've ever worked with.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Experience-Driven Engineering to Digitally Transform Your Business To Stay Ahead.

    Experience-driven engineering to digitally transform your business to stay ahead. We understand your vision and help you build your thoughts into world-class software products. We work with businesses and individuals to help build world-class products and incubate them to grow. Trust us as your technology...

    Location
    Pleasanton, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $25/hr

    AeroQube Services

    • Mobile App Development
    • Web Development
    • eCommerce Development
    • WordPress Website Design
    • AI Development
    • Software Development
    • Blockchain
    • VR/AR
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Pet Supplies 4 Less
    • HardyPaw
    • GoKid
    Data sourced from the agency's DesignRush profile

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