Best Cross-Platform App Development Companies in California

232 Companies - Rankings updated: June 16, 2026

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

United States × California ×

B3NET Inc
Think Digital
Think Digital
B3NET Inc. stands as a leading web design company, offering personalized website solutions, digital marketing, app development, and AI integration services to small and mid-sized businesses in Dallas, Texas. With roots dating back to 1999, our skilled team is committed to providing responsive website design [... view B3NET Inc profile ]
Top Services:
Mobile App Development
Web Development
Android
Location
Santa Ana, California
Number of Employees
Under 49
Average Hourly Rate
$50/hr
View Profile
Top Remotely
Top 1% Tech Talent with 1500+ In-house Developers
Top 1% Tech Talent with 1500+ In-house Developers
We don't just build software at Top Remotely we create solutions that work, scale, and impress. With a powerhouse team of 150+ in-house developers, we turn complex challenges into seamless digital experiences. Whether you need custom software, enterprise platforms, or next-gen IT solutions, we bring the Top [... view Top Remotely profile ]
Top Services:
Mobile App Development
IT Services
Android
Location
Los Angeles, California
Number of Employees
500 - 999
Average Hourly Rate
$20/hr
Minimal Budget
$10,000 - $25,000
View Profile
Start Mobile
Your Marketplace in a Month.
Your Marketplace in a Month.
At Start Mobile, we create innovative online marketplaces featuring mobile apps and AI-powered by ChatGPT. Our unique approach ensures each platform is tailored to meet specific business needs, enhancing user experience and functionality. Partner with us to leverage cutting-edge technology and transform your [... view Start Mobile profile ]
Top Services:
Mobile App Development
Android
iPhone
Location
Los Angeles, California
Number of Employees
Under 49
Average Hourly Rate
$35/hr
Minimal Budget
$1,000 - $10,000
View Profile
Beehive Software
Reimagining Software Development
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 [... view Beehive Software profile ]
Top Services:
Mobile App Development
Web Development
eCommerce
Location
San Jose, California
Number of Employees
100 - 249
Minimal Budget
$10,000 - $25,000
View Profile
5.0 5.0 (4)
Blue Trail Software
More Than Code We Build Trust Through Craft & Commitment
More Than Code We Build Trust Through Craft & Commitment
Engineered with integrity. Backed by mentorship. Delivered with care. BTS transforms ideas into scalable, secure, and impactful digital products that deliver long-term value. [... view Blue Trail Software profile ]
Top Services:
Mobile App Development
IT Services
UI/UX Design
Location
San Francisco, California
Number of Employees
100 - 249
Average Hourly Rate
$55/hr
Minimal Budget
$50,000 & Up
View Profile
Appnality
Forging Digital Realities.
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 [... view Appnality profile ]
Top Services:
Mobile App Development
VR/AR
Web Development
Location
Fremont, California
Number of Employees
50 - 99
Average Hourly Rate
$50/hr
Minimal Budget
$10,000 - $25,000
View Profile
4.3 4.3 (6)
Endertech
Beautiful & Functional Digital Solutions That Deliver ROI
Beautiful & Functional Digital Solutions That Deliver ROI
Endertech (endertech.com, 310.400.0800) is a full-service web and software development company near Los Angeles since the year 2000 providing custom design, e-commerce, software development, and online marketing support. “If you can dream it; We can build it”. [... view Endertech profile ]
Top Services:
Mobile App Development
Web Development
eCommerce
Location
Torrance, California
Number of Employees
Under 49
Average Hourly Rate
$150/hr
Minimal Budget
$1,000 - $10,000
View Profile
4.6 4.6 (19)
Eyfect Designs
Experience Award Winning UX/UI Design From Us.
Experience Award Winning UX/UI Design From Us.
Eyfect Designs is a full-service digital agency specializing in web design, development, and mobile app solutions. We create custom, responsive websites and mobile apps tailored to your brand's needs. Our services also include SEO, digital marketing, UI/UX design, and app maintenance. We are dedicated to [... view Eyfect Designs profile ]
Top Services:
Mobile App Development
UI/UX Design
Android
Location
San Diego, California
Number of Employees
Under 49
Average Hourly Rate
$35/hr
Minimal Budget
$1,000 - $10,000
View Profile
Allusive Digital
Proven Excellence Through Custom Web Design and Development Services.
Proven Excellence Through Custom Web Design and Development Services.
Allusive Digital is a creative and marketing agency that helps businesses grow through branding, web design, content development, and digital marketing. The agency blends thoughtful strategy with polished creative execution to help clients increase visibility, strengthen their identity, and connect with their [... view Allusive Digital profile ]
Top Services:
Mobile App Development
Software Development
iPhone
Location
Los Angeles, California
Number of Employees
Under 49
View Profile
5.0 5.0 (5)
Phoenix Afterglow
Your Full Digital Development Experience.
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 [... view Phoenix Afterglow profile ]
Top Services:
Mobile App Development
Web Development
Android
Location
Irvine, California
Number of Employees
Under 49
Average Hourly Rate
$50/hr
Minimal Budget
$1,000 - $10,000
View Profile
5.0 5.0 (7)
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Fortunesoft IT Innovations
Industry-Specific, Ready To Deploy Solutions That Drive Results
Industry-Specific, Ready To Deploy Solutions That Drive Results
Fortunesoft is an AI-driven digital engineering and solutions company specializing in Healthcare, Life Sciences, and Fintech. [... view Fortunesoft IT Innovations profile ]
Top Services:
Mobile App Development
IT Services
Software Development
Location
Sunnyvale, California
Number of Employees
50 - 99
Minimal Budget
$10,000 - $25,000
View Profile
Atlantis
Straight hands. Hot heads.
Straight hands. Hot heads.
We use the best world practices (YAGNI, KISS, DRI, and SOLID). An enterprise approach is an advantage, not an excuse. An extreme approach to development allows us to resort to the use of development-driven methodologies, in particular design, domain, bound, and testing. [... view Atlantis profile ]
Top Services:
Mobile App Development
Web Development
iPad
Location
Newport Beach, California
Number of Employees
Under 49
Average Hourly Rate
$50/hr
Minimal Budget
$1,000 - $10,000
View Profile
devAtelier
Southern Californias Mobile App experts since 2009
Southern Californias Mobile App experts since 2009
We are San Diego's mobile-native and mobile-first consultancy. We specialize in Swift for iOS, Flutter for iOS/Android, and React for Web. We have led projects for Fortune 500 companies and startups. If you're looking for an easy-to-talk-to and experienced partner to build your app, call devAtelier! [... view DevAtelier profile ]
Top Services:
Mobile App Development
Web Development
HTML5
Location
San Diego, California
Number of Employees
Under 49
Average Hourly Rate
$125/hr
Minimal Budget
$10,000 - $25,000
View Profile
RSunBeat Software
Your Vision, Our Innovation Together, We Build the Future.
Your Vision, Our Innovation Together, We Build the Future.
RSunBeat Software is a globally trusted leader in mobile app development, serving businesses in the USA, UK, Australia, Italy, Dubai, Brazil, and more. We design innovative, high-quality apps that boost growth, elevate user experiences, and turn ideas into powerful digital solutions. [... view RSunBeat Software profile ]
Top Services:
Mobile App Development
Web Development
Android
Location
California City, California
Number of Employees
Under 49
Average Hourly Rate
$15/hr
Minimal Budget
$1,000 - $10,000
View Profile
FACTn Software
Empowering Innovation, Connecting Excellence
Empowering Innovation, Connecting Excellence
FACTn Software, your trusted partner in software engineering outsourcing solutions. Founded with a passion for technological innovation and a commitment to excellence, FACTn Software is dedicated to providing top-tier software engineering talent to companies in the Scandinavian region and beyond. [... view FACTn Software profile ]
Top Services:
Mobile App Development
Software Development
Android
Location
Los Angeles, California
Number of Employees
Under 49
Average Hourly Rate
$45/hr
Minimal Budget
$1,000 - $10,000
View Profile
4.8 4.8 (6)
Source Code Lab
Best Game Development Company in USA.
Best Game Development Company in USA.
Source Code Lab is the Best Custom Game Development Company in Usa/India.Our game developers build remarkable games compatible with the most popular platforms to attract the attention of a wider audience. [... view Source Code Lab profile ]
Top Services:
Mobile App Development
UI/UX Design
Android
Location
San Francisco, California
Number of Employees
50 - 99
Average Hourly Rate
$25/hr
Minimal Budget
Under $1,000
Portfolios Count
1 Project Listed
View Profile
5.0 5.0 (8)
MobMaxime
Top Mobile App and Web Development Company in Canada, USA and UK
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. [... view MobMaxime profile ]
Top Services:
Mobile App Development
Web Development
Android
Location
Sunnyvale, California
Number of Employees
50 - 99
Average Hourly Rate
$15/hr
Minimal Budget
$10,000 - $25,000
Portfolios Count
3 Projects Listed
View Profile
TechMave Software
You Think We Will Deliver
You Think We Will Deliver
TechMave Software LLP delivers innovative web, mobile, and AI solutions tailored to business needs. Our team combines creativity, technology, and strategy to build impactful digital products that empower brands globally. [... view TechMave Software profile ]
Top Services:
Mobile App Development
Software Development
Web Development
Location
Mountain View, California
Number of Employees
50 - 99
Average Hourly Rate
$11/hr
Minimal Budget
$10,000 - $25,000
View Profile
5.0 5.0 (29)
Rytsense Technologies
Leading Global Digital Transformation
Leading Global Digital Transformation
Rytsense Technologies is an AI-driven technology company specializing in AI development services, machine learning solutions, and intelligent automation. We help businesses build advanced AI applications, integrate AI models into existing systems, and transform data into actionable insights. [... view Rytsense Technologies profile ]
Top Services:
Mobile App Development
Software Development
Android
Location
Mountain View, California
Number of Employees
100 - 249
Average Hourly Rate
$25/hr
Minimal Budget
Under $1,000
View Profile
5.0 5.0 (66)
Umang Software Technologies
UMANG means Enthusiasm; Enthusiasm is what drives the mankind!
UMANG means Enthusiasm; Enthusiasm is what drives the mankind!
Umang has been working with some of the elite organization across the globe to develop and maintain their existing legacy applications. They are experts in developing custom software/Mobile/Web applications.Umang has expertise in Delphi, Java, PHP, Python, DotNet and 20+ other technologies and has domain [... view Umang Software Technologies profile ]
Top Services:
Mobile App Development
Outsourcing
iPhone
Location
San Jose, California
Number of Employees
Under 49
View Profile
DS Technologies (Pvt.) Limited
Global Web Development & Digital Marketing Experts
Global Web Development & Digital Marketing Experts
DS Technologies is a global web design, development, and digital marketing agency. We specialize in creating innovative, custom solutions that drive measurable results. With expertise in SEO, UI/UX, and scalable web applications, we help businesses worldwide grow their digital presence and achieve sustainable [... view DS Technologies (Pvt.) Limited profile ]
Top Services:
Mobile App Development
Software Development
HTML5
Location
Los Angeles, California
Number of Employees
Under 49
Average Hourly Rate
$25/hr
Minimal Budget
$1,000 - $10,000
View Profile
4.7 4.7 (27)
Altiux Innovations Pvt. Ltd.
We help accelerate your IoT!
We help accelerate your IoT!
Altiux Innovations is a software and product engineering services organization focused on helping you accelerate the development of your IoT solutions and products. We provide specialized engineering services across the entire IoT development cycle, from consulting, device engineering, cloud and mobility [... view Altiux Innovations Pvt. Ltd. profile ]
Top Services:
Mobile App Development
Software Development
Web Development
Location
Milpitas, California
Number of Employees
50 - 99
Minimal Budget
$1,000 - $10,000
Portfolios Count
1 Project Listed
View Profile
4.4 4.4 (50)
Persistent
See Beyond, Rise Above.
See Beyond, Rise Above.
Persistent Systems, a renowned global leader in software product development and technology services. Delve into our innovative offerings to stay ahead in the ever-evolving landscape of technology. [... view Persistent profile ]
Top Services:
Mobile App Development
Software Development
iPhone
Location
Santa Clara, California
Number of Employees
1000 & Up
Average Hourly Rate
$100/hr
Minimal Budget
$50,000 & Up
View Profile
4.6 4.6 (730)
Opal Infotech
We Build Success Stories
We Build Success Stories
For over 2 decades, starting in 1998, we have been serving a global clientele with web design, web development, mobile app development & digital marketing services. Our expertise spans SEO, Google Ads, Alibaba minisites & ranking optimization & the ongoing maintenance of apps and websites across more than 75 [... view Opal Infotech profile ]
Top Services:
Mobile App Development
Web Development
Cross-Platform
Location
Dublin, California
Number of Employees
50 - 99
Average Hourly Rate
$50/hr
Minimal Budget
$10,000 - $25,000
View Profile
4.8 4.8 (212)
iCode49 Technolabs
4 Steps to Cloud 9
4 Steps to Cloud 9
iCode49 Technolabs stands out as a premier provider specializing in the meticulous development of cutting-edge iOS and Android mobile applications uniquely crafted for both startups and global brands. Our expertise lies in driving innovation within the ever-evolving mobile landscape, where we leverage our [... view ICode49 Technolabs profile ]
Top Services:
Mobile App Development
VR/AR
iPhone
Location
Los Angeles, California
Number of Employees
Under 49
Average Hourly Rate
$20/hr
Minimal Budget
$10,000 - $25,000
View Profile
5.0 5.0 (12)
TechnoBrains Business Solutions
Empowering Businesses Through Innovative Software Development
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 [... view TechnoBrains Business Solutions profile ]
Top Services:
Mobile App Development
Web Development
eCommerce
Location
San Francisco, California
Number of Employees
50 - 99
Minimal Budget
$10,000 - $25,000
View Profile
4.8 4.8 (26)
Chipsy IT Services Pvt. Ltd.
Transform Your Business with Our End-to-End IT Solutions.
Transform Your Business with Our End-to-End IT Solutions.
Chipsy Information Technology Services Pvt Ltd. offers comprehensive IT solutions, including expert consulting, mobile app development (VitalBase is an ABDM-enabled hospital management information system), application development, school management systems, and DevOps services. [... view Chipsy IT Services Pvt. Ltd. profile ]
Top Services:
Mobile App Development
IT Services
Software Development
Location
San Francisco, California
Number of Employees
Under 49
Average Hourly Rate
$12/hr
View Profile
CONTUS Tech
Your Digital Growth Success Partner.
Your Digital Growth Success Partner.
CONTUS Tech stands as a prominent global authority in digital engineering services, heralded for its transformative impact on businesses worldwide. Our forte lies in crafting cutting-edge digital products, pioneering connected vehicle experiences, and spearheading next-generation streaming services that [... view CONTUS Tech profile ]
Top Services:
Mobile App Development
Software Development
Windows
Location
Santa Clara, California
Number of Employees
250 - 499
Average Hourly Rate
$30/hr
Minimal Budget
$25,000 - $50,000
View Profile
4.0 4.0 (314)
Fourchain Technologies Private Limited
Redefine your Business Growth with Fourchain Technologies.
Redefine your Business Growth with Fourchain Technologies.
At Fourchain, we specialize in modernizing businesses by offering comprehensive digital transformation solutions like blockchain, artificial intelligence, fintech and application development services, all tailored to meet the specific pain points and unique needs of startups, mid-size, and enterprise [... view Fourchain Technologies Private Limited profile ]
Top Services:
Mobile App Development
Cross-Platform
Application Modernization
Location
Ontario, California
Number of Employees
Under 49
Average Hourly Rate
$30/hr
Minimal Budget
$1,000 - $10,000
View Profile
5.0 5.0 (21)
NextOlive
Grow with Technology.
Grow with Technology.
We have a Team of 100+ Skilled App Developers who thrive on rolling up their sleeves and solving your IT problems and meeting your business needs like APP Development, Software Development, Cloud Consulting, Generative AI Development, Cyber Security Services, Custom ERP Software Development, and Web [... view NextOlive profile ]
Top Services:
Mobile App Development
Outsourcing
Software Development
Location
Irvine, California
Number of Employees
50 - 99
Average Hourly Rate
$25/hr
Minimal Budget
$10,000 - $25,000
View Profile
Invoxico Technologies
Crafting Websites, Creating Success!
Crafting Websites, Creating Success!
Invoxico Technologies is an adept company in web design and development, acknowledged for its proficiency in crafting customized digital solutions. Their expert team focuses on UI/UX design, web development, CMS development, eCommerce solutions, and mobile app development, and offers a complete range of [... view Invoxico Technologies profile ]
Top Services:
Mobile App Development
IT Services
iPhone
Location
La Puente, California
Number of Employees
Under 49
Average Hourly Rate
$30/hr
Minimal Budget
$1,000 - $10,000
View Profile
5.0 5.0 (10)
TST Technology
Your Trusted IT Consulting Company for Business Success.
Your Trusted IT Consulting Company for Business Success.
TST Technology is an IT consulting company that offers services such as UI/UX design, web and mobile app development, software development, and SaaS product development. They have completed over 40 projects across 15+ industries. [... view TST Technology profile ]
Top Services:
Mobile App Development
IT Services
Web Development
Location
Los Angeles, California
Number of Employees
50 - 99
Average Hourly Rate
$50/hr
Minimal Budget
$1,000 - $10,000
View Profile
5.0 5.0 (22)

Related Services in California

Related Mobile App Development Specializations in California

About The Author and Expert Reviewer

Selina Garcia

Content Specialist

selina@designrush.com

Selina Garcia has authored 500+ articles and edited 50+ published books in economics, law, and history. Her unique blend of experiences allows her to approach content creation from a well-rounded perspective. Currently, Selina applies her expertise to producing insightful articles on IT, software, and applications for DesignRush.

Sergio Oliveira

Former Development Director

spotlight@designrush.com

Sergio is a technology leader with over six years of experience managing global teams and delivering projects across fintech, sportstech, and B2B platforms. At DesignRush, he drove product growth and development execution, building tools that speed up processes by 95% and cut costs by 35% while maintaining full uptime.

Latest Trends Related to Cross-Platform Mobile App Development

App Development

Best Cross-Platform App Development Companies in California

Think Digital

Top 1% Tech Talent with 1500+ In-house Developers

Your Marketplace in a Month.

Reimagining Software Development

More Than Code We Build Trust Through Craft & Commitment

Forging Digital Realities.

Beautiful & Functional Digital Solutions That Deliver ROI

Experience Award Winning UX/UI Design From Us.

Proven Excellence Through Custom Web Design and Development Services.

Your Full Digital Development Experience.

Industry-Specific, Ready To Deploy Solutions That Drive Results

Straight hands. Hot heads.

Southern Californias Mobile App experts since 2009

Your Vision, Our Innovation Together, We Build the Future.

Empowering Innovation, Connecting Excellence

Best Game Development Company in USA.

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

You Think We Will Deliver

Leading Global Digital Transformation

UMANG means Enthusiasm; Enthusiasm is what drives the mankind!

Global Web Development & Digital Marketing Experts

We help accelerate your IoT!

See Beyond, Rise Above.

We Build Success Stories

4 Steps to Cloud 9

Empowering Businesses Through Innovative Software Development

Transform Your Business with Our End-to-End IT Solutions.

Your Digital Growth Success Partner.

Redefine your Business Growth with Fourchain Technologies.

Grow with Technology.

Crafting Websites, Creating Success!

Your Trusted IT Consulting Company for Business Success.

Related Services in California

Related Mobile App Development Specializations in California

About The Author and Expert Reviewer

Latest Trends Related to Cross-Platform Mobile App Development