List of Top Mobile App Development Companies in California | Top App Developers in California | Hire App Developers in California
251 to 1000
$26 - $50 /hr
Mobile App Development
USA
SunTec.AI is a top data annotation company empowering businesses with high-quality training datasets for diverse AI/ML project needs. Rated as one of the industry's best data annotation companies, we are a sister company of the globally renowned IT outsourcing company - SunTec India. Read More About SunTec.AI
11 to 50
$26 - $50 /hr
Mobile App Development
USA
Infiniti Digital Marketing Agency helps businesses grow online. Our core services include SEO, AIO, content marketing, social media management, and website services. We focus on driving revenue growth by attracting more visitors and turning them into customers through smart and effective strategies. Read More About Infiniti Digital
11 to 50
$51 - $100 /hr
Mobile App Development
USA
Catalyst is an award-winning integrated marketing agency designed to deliver the full reach, creativity, & impact of an in-house marketing team - without the overhead. Our team specializes in developing data-driven strategies that help brands grow through innovative digital marketing, creative campaigns, branding, & performance optimization. With a focus on measurable results & long-term partnerships, Catalyst empowers businesses to elevate their marketing efforts & achieve sustainable success. Read More About Catalyst Marketing Agency
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11 to 50
< $25 /hr
Mobile App Development
USA
Building Brands That Stand Out, From Code to Creativity, We Deliver Results. Read More About The City of Code
51 to 250
$51 - $100 /hr
Mobile App Development
USA
Roofing SEO Agency is a specialized SEO firm dedicated exclusively to helping roofing companies grow through high-impact, local-focused search strategies. Backed by LOOPEX Digital and led by experienced founders, the agency combines technical SEO, conversion-driven content, and transparent reporting to deliver real results—more visibility, more qualified leads, and sustainable revenue growth for roofing contractors. Read More About Roofex SEO
2 to 10
$26 - $50 /hr
Mobile App Development
USA
Accountants SEO is a niche SEO agency for accountants, CPAs, and accounting firms grow their online visibility and generate qualified leads. We specialise in SEO strategies tailored to the accounting industry, including local SEO, technical optimisation, content strategy, and ethical link building. Read More About Accountants SEO
51 to 250
$26 - $50 /hr
Mobile App Development
USA
Professional WP support services providing reliable WordPress website maintenance, updates, security monitoring, troubleshooting, performance optimization, and technical assistance. We help businesses keep their websites secure, fast, and running smoothly with expert support and ongoing maintenance solutions tailored to ensure stability and long-term website performance. Read More About WP support
11 to 50
< $25 /hr
Mobile App Development
USA
IntuitionLabs is a Silicon Valley firm building AI software for pharma. Led by veteran Adrien Laurent, we bridge the gap between GenAI and regulations like FDA 21 CFR Part 11 and GxP. As a Veeva Vault CRM X Pages Partner, we offer Veeva Nitro integration, data engineering, and clinical chatbots. Our four step method (Assess, Train, Support, Measure) ensures compliant digital transformation and real time sales insights for leaders like Scilex. Read More About IntuitionLabs
2 to 10
$51 - $100 /hr
Mobile App Development
USA
LawRank is a premier legal marketing agency that specializes in SEO, PPC, and web design. We have a proven track record of achieving first-page results for attorneys in the most competitive markets. Read More About LawRank
51 to 250
< $25 /hr
Mobile App Development
USA, Australia
BugRaptors pioneers' software testing with AI-driven automation, offering a diverse array of software testing and QA services to ensure your applications' excellence. With a track record of smashing half a million bugs, we blend innovation with expertise to elevate your software's performance. Our commitment to quality assurance is unwavering, making BugRaptors your go-to partner for cutting-edge testing solutions. Read More About BugRaptors
Exceptional Security Testing Services for Banking Software
Katherine Williams,
2 to 10
< $25 /hr
Mobile App Development
India, USA
Naveck Technologies is a premier offshore development company, connecting businesses with top-tier remote software developers, UX/UI designers, product managers, and technology consultants. We specialize in providing dedicated teams to startups, SMEs, and large enterprises, offering expertise across a wide range of modern technologies and programming languages. Read More About Naveck Technologies
251 to 1000
$26 - $50 /hr
Mobile App Development
India, USA
CONTUS Tech is your turnkey partner for end-to-end product development, design, and strategy. As a leading full-stack software product design and development company, we build high-performance, scalable tech products engineered for rapid market launch and long-term success. Read More About CONTUS Tech
51 to 250
$101 - $150 /hr
Mobile App Development
USA
RankMeTop is a full-service plumbing & HVAC digital marketing agency helping contractors & service companies grow with measurable results. As a growth partner, we provide internet marketing services like Local SEO, LSAs, GBP management, social ads, minimalistic web design, reputation management & content marketing. With Decades of combined experience, we guarantee 300% ROI in 12 months or work free. Read More About RankMeTop
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11 to 50
$51 - $100 /hr
Mobile App Development
USA
The Los Angeles SEO Company is your one-stop solution for achieving online success. With over four years of expertise, 635+ websites ranked, and 180+ clients served worldwide, we pride ourselves on delivering ROI-focused services. Read More About The Los Angeles SEO Company
251 to 1000
< $25 /hr
Mobile App Development
USA
Data4eCom is a full-service eCommerce and marketing agency with 25+ years of experience and 500+ full-time employees. Read More About Data4eCom
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Top Mobile App Development Companies in New York - May, 2026 | Rightfirms
