Top Cross-Platform App Development Companies in California

Best Cross-Platform App Development Companies in California

234 Companies-Rankings updated: September 06, 2026

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

Show Filters

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

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...
Top Services:
Web Design
eCommerce Development
Web Development
WordPress Website Design
Digital Marketing
Show more
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)
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...
Top Services:
Blockchain
Mobile App Development
AI Development
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)
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...
Top Services:
Mobile App Development
IT Services
Cloud Consulting
DevOps Consulting
Software Development
Show more
Location
San Francisco, California
Number of Employees
Under 49
Average Hourly Rate
$12/hr
View Profile
AppCrops
Turning Ideas Into Interactive Apps
Turning Ideas Into Interactive Apps
AppCrops is a next-gen technology partner delivering end-to-end digital solutions for startups and enterprises. From interactive user-friendly iOS, Android or Custom Mobile applications to Web apps, ERP systems and custom software, we help transform ideas into high-performing digital products...
Top Services:
Mobile App Development
Web Development
eCommerce Development
Software Development
Web Design
Show more
Location
Los Angeles, California
Number of Employees
50 - 99
Average Hourly Rate
$50/hr
Minimal Budget
$1,000 - $10,000
Portfolios Count
4 Projects Listed
View Profile
5.0 5.0 (3)
DECOSTA Global
Achieving the Unachievable.
Achieving the Unachievable.
We create and manage the world's most iconic brands. Brand and product agency that delivers heroic work and legendary clients. DECOSTA has worked with clients in a wide range of industries including entertainment, consumer goods, technology, energy, finance, and more...
Top Services:
Digital Services
Branding
Creative Services
Product Design
Digital Strategy
Show more
Location
Burbank, California
Number of Employees
Under 49
Average Hourly Rate
$300/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
6 Projects Listed
View Profile
5.0 5.0 (1)
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...
Top Services:
Graphic Design
Web Design
eCommerce Development
Web Development
UI/UX Design
Show more
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)
Burbon Studios
Pushing Brands Further.
Pushing Brands Further.
Burbon Studios is an end to end power house crafting forward thinking brands, accompanied by best in class practices & brilliant design...
Top Services:
Web Design
eCommerce Development
Web Development
Digital Marketing
SEO
Show more
Location
Santa Monica, California
Number of Employees
Under 49
Average Hourly Rate
$100/hr
Minimal Budget
$1,000 - $10,000
Portfolios Count
1 Project Listed
View Profile
5.0 5.0 (35)
yuj - UX Design Company
Verified
Enterprise UX Design | 3,000+ Projects for Fortune 100/500 Clients
Enterprise UX Design | 3,000+ Projects for Fortune 100/500 Clients
yuj is a global UX design company with 16+ years of experience and 3,000+ projects delivered for Fortune 100 and Fortune 500 clients across automotive, fintech, healthcare, and hi-tech industries...
Top Services:
Product Design
AI Development
Digital Strategy
Design Services
UI/UX Design
Show more
Location
Sunnyvale, California
Number of Employees
100 - 249
Portfolios Count
8 Projects Listed
View Profile
4.2 4.2 (92)
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...
Top Services:
AI Development
Mobile App Development
Software Development
Blockchain
Software Testing
Show more
Location
Irvine, California
Number of Employees
50 - 99
Average Hourly Rate
$25/hr
Minimal Budget
$10,000 - $25,000
View Profile
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...
Top Services:
IT Services
UI/UX Design
Mobile App Development
Software Development
Web Development
Show more
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)
Need Help Selecting The Right Cross-Platform Mobile App Development Agency in California For Your Project?
We'll Find The Best Agencies For You.
TELL US ABOUT YOUR PROJECT
Appinventors Inc
Digital Transformation Agency.
Digital Transformation Agency.
Appinventors stands as a prominent Digital Transformation Agency, enabling businesses to prosper within the contemporary digital landscape. At Appinventors, we pride ourselves on delivering exceptional customer support and assistance. Whether you're facing technical challenges or seeking guidance on your...
Top Services:
IoT
Mobile App Development
Digital Services
UI/UX Design
Software Development
Show more
Location
Los Angeles, California
Number of Employees
50 - 99
Average Hourly Rate
$25/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...
Top Services:
Web Development
UI/UX Design
Mobile App Development
Digital Marketing
Blockchain
Show more
Location
California City, California
Number of Employees
Under 49
Average Hourly Rate
$15/hr
Minimal Budget
$1,000 - $10,000
View Profile
Tap Built
Tap Built, located in California, creates innovative mobile apps and engaging games for entrepreneur
Tap Built, located in California, creates innovative mobile apps and engaging games for entrepreneur
Tap Built Located in California creates innovative mobile apps and engaging games for entrepreneurs startups and business worldwide...
Top Services:
Mobile App Development
UI/UX Design
Blockchain
Location
West Covina, California
Number of Employees
50 - 99
Average Hourly Rate
$100/hr
Minimal Budget
$1,000 - $10,000
View Profile
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...
Top Services:
Web Design
Web Development
SEO
Mobile App Development
eCommerce
Show more
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)
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...
Top Services:
Web Design
Web Development
Mobile App Development
SEO
Digital Marketing
Show more
Location
San Diego, California
Number of Employees
Under 49
Average Hourly Rate
$35/hr
Minimal Budget
$1,000 - $10,000
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...
Top Services:
Mobile App Development
Software Development
DevOps Consulting
IT Services
Web Development
Show more
Location
Los Angeles, California
Number of Employees
500 - 999
Average Hourly Rate
$20/hr
Minimal Budget
$10,000 - $25,000
View Profile
Royce Web Solutions
Affordable & Premium Web Development Company
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...
Top Services:
Web Design
eCommerce Development
Mobile App Development
Web Development
Show more
Location
Mountain View, California
Number of Employees
Under 49
Average Hourly Rate
$35/hr
Minimal Budget
$1,000 - $10,000
View Profile
Appingine
Developing The Best Mobile Apps
Developing The Best Mobile Apps
Appingine is a top app development company in the U.S., known for turning bold ideas into powerful mobile experiences. We create award-winning apps that consistently earn recognition and visibility on the App Store and Google Play. Our team is dedicated to delivering high-quality, user-focused solutions that...
Top Services:
Mobile App Development
AI Development
VR/AR
Web Development
Blockchain
Show more
Location
Los Angeles, California
Number of Employees
100 - 249
Average Hourly Rate
$35/hr
Minimal Budget
$10,000 - $25,000
Portfolios Count
6 Projects Listed
View Profile
5.0 5.0 (10)
Web Design Mechanic
A Leading Web Design & Development Agency
A Leading Web Design & Development Agency
Web Design Mechanic creates clean, custom websites and digital experiences build to match your business goals. "No templates", just thoughtful design and smart development. We also offer digital marketing services like, Search Engine Optimization, Social Media Marketing, Online Reputation Management, and...
Top Services:
Web Design
Web Development
Branding
eCommerce Development
Video Production
Show more
Location
Fremont, California
Number of Employees
50 - 99
Average Hourly Rate
$25/hr
Minimal Budget
$1,000 - $10,000
Portfolios Count
1 Project Listed
View Profile
XWEBAGENCY
We Design Develop Host & Maintain Your Online Presence
We Design Develop Host & Maintain Your Online Presence
XWebAgency, Your trusted web agency. We offer website design, web development, SEO services, digital marketing, and e-commerce solutions to help your business grow online...
Top Services:
Digital Marketing
Mobile App Development
Web Design
SEO
eCommerce Development
Show more
Location
Desert Hot Springs, California
Number of Employees
Under 49
Average Hourly Rate
$55/hr
Minimal Budget
Under $1,000
Portfolios Count
4 Projects Listed
View Profile
Soft Does
Custom Software That Works In The Real World
Custom Software That Works In The Real World
SoftDoes builds custom software, AI, and web applications for mid-market companies that need enterprise-grade results without the overhead of an in-house team. U.S.-based leadership. Full IP ownership. No lock-in...
Top Services:
Software Development
AI Development
Mobile App Development
Web Development
UI/UX Design
Show more
Location
San Francisco, California
Number of Employees
50 - 99
Average Hourly Rate
$75/hr
Minimal Budget
$10,000 - $25,000
Portfolios Count
1 Project Listed
View Profile
Code Genesis
Aiming to Achieve Your Business Goals Through Technology
Aiming to Achieve Your Business Goals Through Technology
Code Genesis is a full-stack development company dedicated to building scalable and secure digital platforms. We combine expertise in cloud, automation, and modern software engineering to create solutions that are both innovative and reliable. Our mission is to deliver technology that not only meets todays...
Top Services:
Mobile App Development
Software Development
UI/UX Design
AI Development
DevOps Consulting
Show more
Location
Santa Clara, California
Number of Employees
50 - 99
Average Hourly Rate
$30/hr
Minimal Budget
$1,000 - $10,000
Portfolios Count
7 Projects Listed
View Profile
ACubetech Solutions Private Limited
Take Charge Of Your Business Continuity
Take Charge Of Your Business Continuity
ACUBE USAL LLC is a US registered custom Software development company delivering solutions in web, mobile & AI-driven solutions to companies across the US, Europe and Australia. We have proven experience in delivering solutions into education, healthcare, real-estate, E-commerce, logistics, food compliance...
Top Services:
Mobile App Development
Location
Nevada City, California
Number of Employees
50 - 99
Average Hourly Rate
$20/hr
Minimal Budget
$1,000 - $10,000
Portfolios Count
1 Project 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...
Top Services:
Design Services
eCommerce Development
Web Development
AI Development
Mobile App Development
Show more
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 (30)
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...
Top Services:
Web Development
eCommerce Development
Web Design
WordPress Website Design
AI Development
Show more
Location
Los Angeles, California
Number of Employees
Under 49
View Profile
5.0 5.0 (5)
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...
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
View Profile
5.0 5.0 (4)
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...
Top Services:
Software Development
Mobile App Development
AI Development
Cloud Consulting
Managed Services
Show more
Location
Los Angeles, California
Number of Employees
Under 49
Average Hourly Rate
$45/hr
Minimal Budget
$1,000 - $10,000
View Profile
5.0 5.0 (10)
Kingdom Vision
We Build Cool Stuff With Cool People...
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...
Top Services:
Web Design
Branding
Web Development
Mobile App Development
Digital Marketing
Show more
Location
San Jose, California
Number of Employees
Under 49
Average Hourly Rate
$25/hr
Minimal Budget
Under $1,000
View Profile
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...
Top Services:
Software Development
AI Development
Big Data Analytics
Mobile App Development
UI/UX Design
Show more
Location
San Francisco, California
Number of Employees
100 - 249
Average Hourly Rate
$55/hr
Minimal Budget
$50,000 & Up
View Profile
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...
Top Services:
AI Development
Mobile App Development
Software Development
Business Consulting
Show more
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 (67)
Bay Area Coders
Strategy, design, engineering, and AI
Strategy, design, engineering, and AI
Bay Area Coders is a San Francisco-based product and engineering studio working with venture-backed startups and growth-stage companies since 2016. We combine strategy, design, engineering, and AI to help teams ship real products and modernize existing ones...
Top Services:
Software Development
Web Development
Mobile App Development
AI Development
Design Services
Show more
Location
Roseville, California
Number of Employees
Under 49
Average Hourly Rate
$100/hr
Minimal Budget
$1,000 - $10,000
View Profile
CloneAppz
Verified
White label & clone app development company
White label & clone app development company
CloneAppz delivers white label and clone app solutions that help businesses go live faster. We combine proven technology with smart customization to give you a platform that genuinely represents your brand and supports real growth...
Top Services:
Mobile App Development
Location
San Francisco, California
Number of Employees
50 - 99
Average Hourly Rate
$20/hr
Minimal Budget
$1,000 - $10,000
View Profile
Born West Inc.
We Build Digital Products, Experiences, And Systems ‍that Matter.
We Build Digital Products, Experiences, And Systems ‍that Matter.
Born West is a creative tech agency. We turn ambitious ideas into working software from inception to launch. Our senior strategists, designers, and engineers work as one team to shape digital products, AI-powered tools, platforms, and experiences that are thoughtful, scalable, and built to ship...
Top Services:
Product Design
Web Design
eCommerce Development
Web Development
WordPress Website Design
Show more
Location
Concord, California
Number of Employees
Under 49
Average Hourly Rate
$200/hr
View Profile
Teamvoy
We Bring The Tech. You Get The Wins.
We Bring The Tech. You Get The Wins.
Teamvoy is an AI engineering and transformation partner. We help companies make smarter technology decisions and turn them into production-ready software...
Top Services:
Software Development
AI Development
Design Services
Web Design
UI/UX Design
Show more
Location
Covina, California
Number of Employees
50 - 99
Average Hourly Rate
$50/hr
Minimal Budget
$10,000 - $25,000
View Profile
4.7 4.7 (29)

Related Services in California

Related Mobile App Development Specializations in California

Popular Services

Latest Trends Related to Cross-Platform Mobile App Development

App Development

iPhone vs. Android: 60+ Key Market Statistics Every Business Should Know

20,362

App Development

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

38,803

App Development

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

26,969

Best Cross-Platform App Development Companies in California

We Build Success Stories

Redefine your Business Growth with Fourchain Technologies.

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

Turning Ideas Into Interactive Apps

Achieving the Unachievable.

Global Web Development & Digital Marketing Experts

Pushing Brands Further.

Enterprise UX Design | 3,000+ Projects for Fortune 100/500 Clients

Grow with Technology.

Your Trusted IT Consulting Company for Business Success.

Digital Transformation Agency.

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

Tap Built, located in California, creates innovative mobile apps and engaging games for entrepreneur

Your Full Digital Development Experience.

Experience Award Winning UX/UI Design From Us.

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

Affordable & Premium Web Development Company

Developing The Best Mobile Apps

A Leading Web Design & Development Agency

We Design Develop Host & Maintain Your Online Presence

Custom Software That Works In The Real World

Aiming to Achieve Your Business Goals Through Technology

Take Charge Of Your Business Continuity

You Think We Will Deliver

Proven Excellence Through Custom Web Design and Development Services.

Reimagining Software Development

Empowering Innovation, Connecting Excellence

We Build Cool Stuff With Cool People...

More Than Code We Build Trust Through Craft & Commitment

Leading Global Digital Transformation

Strategy, design, engineering, and AI

White label & clone app development company

We Build Digital Products, Experiences, And Systems ‍that Matter.

We Bring The Tech. You Get The Wins.

Related Services in California

Related Mobile App Development Specializations in California

Popular Services

Latest Trends Related to Cross-Platform Mobile App Development

ReceiveProposals