Best Cross-Platform App Development Companies in California

8 Companies-Rankings updated: November 13, 2026
Cross-Platform
HR
Budget
Sort by: Number of Reviews

Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

United States × California × Cross-Platform Mobile App Development × HR × Sort by: Number of Reviews ×Clear Filters

  • Rocketech Development

    We Create Digital Products And Grow With Our Partners!

    Rocketech is a software development company. We help founders and business teams decide what to build, build it, and keep it running after launch...

    Top Services:

    • Mobile App Development
    • Web Development
    • Software Development
    • Blockchain
    • UI/UX Design
    • Show more
    Location
    San Francisco, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    14 Projects Listed
    View Profile
    DesignRush verified(6)4.8
    Google reviews(1)5.0

  • ZAAG SYSTEMS

    Ai fist design & development company

    ZAAG SYSTEMS delivers scalable web, mobile & AI solutions with sleek design, driving business growth for US startups...

    Top Services:

    • eCommerce Development
    • AI Development
    • Web Development
    • Software Development
    • Web Design
    • Show more
    Location
    Santa Clara, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    17 Projects Listed
    View Profile
    DesignRush verified(3)4.6
    Google reviews(28)4.7

  • Techcronus Business Solutions Pvt. Ltd.

    Leading Web and Mobile App Development Company in India, USA, & AUS

    Techcronus Business Solutions is a global provider of enterprise business solutions and modern-day technology services...

    Top Services:

    • Mobile App Development
    • Web Development
    • PPC
    • SEO
    • UI/UX Design
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $25/hr
    Portfolios Count
    14 Projects Listed
    View Profile
    DesignRush verified(1)4.3

  • L+R

    End-to-end digital product design and engineering.

    End-to-end digital product design and engineering for enterprises and premium brands...

    Top Services:

    • Branding
    • Mobile App Development
    • Software Development
    • AI Development
    • Design Services
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    4 Projects Listed
    View Profile
    Google reviews(8)5.0

  • Azilen Technologies

    An Enterprise AI Development Company

    Azilen Technologies is a prominent enterprise AI development company that takes pride in delivering exceptional AI, Data, and HRTech solutions to organizations seeking digital transformation...

    Top Services:

    • AI Development
    • Software Development
    • IT Services
    • IoT
    • Cloud Consulting
    • Show more
    Location
    San Francisco, California
    Number of Employees
    250 - 499
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    16 Projects Listed
    View Profile

  • Luvina Software

    Precision Discipline Delivery

    Luvina is a well-known software outsourcing business that specializes in providing clients all around the world with excellent IT solutions. With a dedicated team of more than 750 experts, Luvina provides comprehensive software development services that are customized to each client's specific needs. Luvina...

    Top Services:

    • ERP Consulting
    • CRM Consulting
    • Software Development
    • eCommerce Development
    • Staff Augmentation
    • Show more
    Location
    San Jose, California
    Number of Employees
    500 - 999
    Average Hourly Rate
    $25/hr
    View Profile
    Google reviews(61)4.7

  • Appnality

    Forging Digital Realities.

    Appnality is an American software company that offers diverse mobile app development services. Be it App Concept and Strategy or UX and UI design development, Appnality has all your mobile app needs covered. Our quality assurance, testing, and data protection provide you with a fulfilling, keeping you and...

    Top Services:

    • Mobile App Development
    • Web Development
    • AI Development
    • VR/AR
    • Software Testing
    • Show more
    Location
    Fremont, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $10,000 - $25,000
    View Profile
    Google reviews(6)4.3

  • 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
    Portfolios Count
    1 Project Listed
    View Profile
    Google reviews(26)4.8

Related Services in California

Related Mobile App Development Specializations in California

Why companies trust DesignRush

Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
132,332+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
48%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
8
Google4.8102 reviewsTrustpilot4.8308 Reviews

Some agencies pay for sponsored placement, clearly labeled and held to the same vetting standards.

See how rankings and monetization work.

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

20,787
Mobile App Development AI Tools
App Development

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

39,303
No-Code App Builders
App Development

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

27,479