Best California Startup App Development Companies

60 Companies - Rankings updated: August 22, 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.

United States × California ×
  • Your Full Digital Development Experience.

    Phoenix Afterglow is a premier multimedia company specializing in web development, app development, online marketing, and cybersecurity. They are dedicated to upholding the highest standards of performance, integrity, and ethics to ensure client satisfaction and achieve a lasting sense of fulfillment for all...

    Location
    Irvine, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $1,000 - $10,000
  • We Turn Your Vision Into Reality

    Helping U.S. businesses grow online since 2022, we provide affordable custom web design and SEO services that deliver measurable results...

    Location
    Ontario, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $20/hr
    Minimal Budget
    Under $1,000
  • Affordable & Premium Web Development Company

    Royce Web Solutions is a full service digital agency specializing in custom websites, e-commerce stores, SaaS platforms, and AI-Powered web and mobile apps. We help startups and businesses turn ideas into fast, scalable and user-friendly digital products...

    Location
    Mountain View, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
  • We Build Cool Stuff With Cool People...

    Kingdom Vision is a digital agency specializing in web design, web development, and custom software solutions for businesses and startups. The company offers a range of services including mobile app development, CMS development, branding, and digital marketing to help clients build and grow their online...

    Location
    San Jose, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    Under $1,000
  • Web Design and Mobile App Development Company

    Carmatec is an enterprise IT solutions provider with over 23+ years of proven industry experience and has successfully carved out a niche in web development, software and application design and development apart from its expertise in mobile development, managed IT services & cloud solutions...

    Location
    Los Angeles, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    3 Projects Listed
  • Full Cycle Software & Mobile App Development Company.

    Dreamer Technoland is a web development, mobile app design and development company building reliable solutions for businesses and startups...

    Location
    Alameda, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    3 Projects Listed
  • Innovate, Create, Excel.

    SoftGrid Computers is a prominent custom software development company that excels in blending the latest technologies with well-organized creative work. With a strong focus on understanding client needs and delivering optimal solutions, we strive to be a reliable partner that offers great value for money. Our...

    Location
    Santa Monica, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $49/hr
    Minimal Budget
    $1,000 - $10,000
  • Innovate, Code, Elevate Transforming Ideas into Reality.

    H.R. Software Solutions Pvt. Ltd. is a leading IT company offering cutting-edge software development, web solutions, and digital marketing services. We specialize in ERP, CRM, mobile app development, and AI-driven solutions for businesses of all sizes. With a customer-centric approach, we deliver innovative...

    Location
    Ontario, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $10,000 - $25,000
  • AI Enabled Digital Transformation

    Nextwebi, a technology-driven digital transformation company delivering intelligent, AI-powered solutions to businesses of all sizes. We partner with startups, SMEs, & enterprises & help them adopt modern tech that improve efficiency, enhance customer experiences, &unlock new growth opportunities...

    Location
    San Francisco, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
  • Driving Digital Growth Across Industries

    Hilton Software Technologies is an IT solutions company based in Hyderabad, delivering customized software, web, and digital services since 2013. The company helps businesses of all sizes accelerate growth through innovative technology, reliable support, and tailored digital solutions...

    Location
    Fremont, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $1,000 - $10,000

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