Our expert analysts identified the leading mobile app developers in California that create high-performance apps that engage and retain their user base. Filter listings by city, team size, cost of services and reviews to personalize your search. Choose the best partner for your brand and take advantage of these agencies' expertise and experience.
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.
Engineering Intelligent Solutions Through Design and Code - Web, Mobile AI, Blockchain
SapientPro is a custom software, design, and AI development team. Since 2017, we've shipped 200+ projects in the US and EU, with offices in New York, Tallinn, and Lucerne. Most clients come back for a second project, the metric we actually care about...
Top Services:
- AI Development
- eCommerce Development
- Mobile App Development
- Web Design
- Web Development
- Show more
- Location
- San Francisco, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $40/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 20 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsSapientPro Services
Data sourced from the agency's DesignRush profileZich Solutions Contentoo HEX MasTrack Sprinkle Slab Sharks SalesLogs Piktochart The Big Data Chef Footshop
SapientPro Reviews & Testimonials

Software Development Review from Slava Berkovich
SapientPro consistently delivers high-quality work that aligns with project requirements. The team demonstrates strong expertise in Angular, TypeScript, and JavaScript. Their project management and communication practices are highly effective, with weekly client meetings held to provide updates on progress and ensure alignment.

Software Development Review from Jeremy Ott
This team was extremely responsive from the start. They pulled together a comprehensive quote for my MVP and have delivered on all of the requirements. The daily updates from the product/project manager are extremely helpful and it’s clear that the team cares about the quality of work they deliver. The engineers working on the product are always willing to make recommendations and go above and beyond to make the experience and underlying infrastructure that much better.

eCommerce Development Review from Luc Vlekken
We've had the pleasure of working closely with this development team on several projects, and the experience has been consistently excellent. Not only are they highly skilled developers, but they also think along with us both from a technical and a product/customer perspective. Their proactive attitude, reliability, and ability to translate complex requirements into elegant solutions make them a true partner rather than just a supplier. Highly recommended.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsEnterprise AI Solutions | Scalable . Flexible. Sustainable
Seasia Infotech is a global AI-powered digital engineering company with 25+ years of experience delivering custom software, AI solutions, cloud applications, mobile apps, and enterprise platforms. We help businesses accelerate innovation, improve efficiency, and drive digital transformation...
Top Services:
- Software Development
- Mobile App Development
- Web Development
- AI Development
- Big Data Analytics
- Show more
- Location
- Emeryville, California
- Number of Employees
- 500 - 999
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 65 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsSeasia Infotech Services
Data sourced from the agency's DesignRush profileAdani Group Flipkart Harley-Davidson Microsoft MainStreet Equity Corp HDFC Bank Swaraj Innopharma Education Renault Puda
Seasia Infotech Reviews & Testimonials

eCommerce Development Review from cornelia verden
This Company is AMAZING, they are very professional. We hired them to build my website, and they did an EXCELLENT job. They continuously communicated with me during the development phase. If you want a beautiful, well-designed, professional website that has optimum functionabilty, You must go with Seasia Infotech. You can always expect excellent quality services from the professionals at Seasia Infotech.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsWorld-Class Software Engineering Partner
Dream X is a full-cycle software development company dedicated to building high-performance products. Founded in 2022 by Alexandr Korshykov, we partner with businesses worldwide to deliver end-to-end technical solutions...
Top Services:
- UI/UX Design
- Web Design
- Product Design
- Mobile App Development
- Web Development
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $30/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 15 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsDreamX Services
Data sourced from the agency's DesignRush profilePladri Greek Time Corp. PropTexx
DreamX Reviews & Testimonials

UI/UX Design Review from Yuriy Husev
We hired DreamX to redesign our company website to better reflect DMTs modern approach to B2B lead generation and appointment-setting services. The DreamX team quickly understood our brands personality and transformed it into a sleek, fast, and conversion-focused digital experience. Their UX/UI team created user flows that made our content easier to navigate and optimized for lead capture. Communication was professional and consistent we always knew exactly what stage the project was in. The final result exceeded expectations: the new website not only strengthened our online presence but also positively impacted inbound lead quality. We highly recommend DreamX to any business looking for a creative and reliable design partner.

UI/UX Design Review from Vlad Kozhulenko
We worked with DreamX on developing a corporate website, and the results exceeded our expectations. Their team demonstrated a perfect balance of creativity, technical expertise, and attention to detail. From the very first step, they carefully analyzed our needs, created a modern and functional design, and ensured a smooth user experience.What impressed us most was their ability to translate our brand identity into a digital format that feels both professional and engaging. DreamXs communication was clear and proactive throughout the project, which made the entire collaboration smooth and efficient.I highly recommend DreamX to any company looking for a reliable partner in web and UI/UX design. They not only deliver on time but also go the extra mile to make sure the final product truly stands out.

Web Design Review from Iryna Liashko
We partnered with DreamX to redesign our corporate website and improve its overall user experience. Their team approached the project with a clear strategy, focusing on both visual appeal and usability.From the very beginning, communication was excellent, every step of the process was transparent, and we received timely updates along with interactive design prototypes. DreamX demonstrated strong expertise in UX/UI, helping us simplify complex flows and create a design that looks modern, clean, and fully responsive.The final result exceeded expectations: the site now feels intuitive, fast, and visually consistent across all devices. Were very satisfied with the collaboration and highly recommend DreamX for any UX/UI design projects.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsInnovation Beyond Imagination
iApp Technologies: Trusted digital product development partner helping brands turn ideas into powerful & scalable solutions. We specialize in designing and building high-performance Web and Mobile Apps (iOS + Android) that align with evolving market demands and deliver measurable business impact...
Top Services:
- Mobile App Development
- Blockchain
- AI Development
- Web Development
- UI/UX Design
- Show more
- Location
- San Ramon, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $20/hr
- Minimal Budget
- Under $1,000
- Portfolios Count
- 60 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsiapp Technologies LLP Services
Data sourced from the agency's DesignRush profileVPN Proxy Master Poster App Lab Pool Ride ChiroRing App
iapp Technologies LLP Reviews & Testimonials

Mobile App Development Review from Shubhpreet Sidhu
iapp Technologies provided an exceptional experience in developing the SASA Rides mobile app for both Android and iOS platforms. Their team demonstrated outstanding professionalism, clear communication, and a strong commitment to delivering high-quality results. Every stage of the app development was handled efficiently, with timely updates and meticulous attention to detail. They were responsive to feedback, proactive in offering innovative solutions, and genuinely dedicated to client satisfaction. The expertise and dedication they brought to the project made the entire process smooth and stress-free. I highly recommend iapp Technologies for reliable, skilled, and client-focused mobile app development.

Web Design Review from Seth Horsley
I worked with them extensively and they have been very helpful and extremely responsive and have provided very high quality work. Definitely recommend!

Web Development Review from Gursewak Singh Brar
iapp Technologies provided excellent service with timely delivery, clear communication, and high-quality results. Their team is professional, responsive, and truly dedicated to client satisfaction. Highly recommended!
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsAI & Blockchain Built for Scale
Dubai-headquartered technology company specialising in AI, Blockchain, Web & Mobile, and DevOps solutions. 14+ years delivering enterprise-grade digital products for clients across the US, UAE, and UK...
Top Services:
- AI Development
- Blockchain
- Software Development
- Web Development
- Mobile App Development
- Show more
- Location
- Santa Monica, California
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $25/hr
- Portfolios Count
- 18 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsCandour Technolabs Services
Data sourced from the agency's DesignRush profileBlockthree Technologies Borrowland Pinnaclepay Group Limited Vulcan Technologies LLC.
Candour Technolabs Reviews & Testimonials

Blockchain Review from khashayar maleki
I highly recommend working with Candour company. They are extremely professional and reliable. I've been collaborating with them on developing my lending platform, and I'm very satisfied with the experience, especially working with Naresh.
Manoj Dhiman's Review Sourced from Google
As a startup, we needed a team that could turn our vision into a production-ready product quickly. Candour helped us launch our AI-powered app on both iOS and Android. Their project management was incredibly responsive, and they treated our product like their own. The quality of the UI/UX design was particularly impressive. Highly recommend them for any custom software needs.
Avinash's Review Sourced from Google
Smooth experience overall—clear communication, good quality work, and a team you can rely on.What stood out was their commitment and attitude. They stayed engaged and made sure everything worked as expected.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsElevating User Experiences through Product Design
Lazarev. is a powerhouse team of UX strategists, UI/UX designers, product & motion designers and business analysts. We specialize in building revolutionary products and redesigning web platforms/apps for early-stage startups and established brands...
Top Services:
- Web Design
- Mobile App Development
- UI/UX Design
- Design Services
- Product Design
- Show more
- Location
- San Francisco, California
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $120/hr
- Portfolios Count
- 10 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsLazarev. Services
Data sourced from the agency's DesignRush profileHewlett Packard Xiaomi Pattern Trader Accern Abu - Dhabi University Picoworkers Getbee Hackernauts Insticator Blankspace
Lazarev. Reviews & Testimonials

Web Design Review from Safwan Al Turk
Within the first months, the concept [was] clarified and things started to take [...] shape. Afterw[a]rds, the application of the creativity on the UI started to take shape. Minor modifications along the way that led to an amazing outcome. (Verified via email)
Oleksii Ditchuk's Review Sourced from Google
worked with Lazarev Agency on a SaaS platform for AI tools, and it was a great experience. the team was responsive, understood our needs, and delivered clean, user-friendly designs. They made the whole process smooth and straightforward
Valeria Semenova's Review Sourced from Google
When we first met, I knew Lazarev would be the right company to build the online version of our boutique design studio. Their attention to detail, while hand crafting an UI that resonates the brand well has been commendable. They designed something that really represents our aesthetic, while also providing a very seamless and beautiful shopping experience for our customers. The backend, meanwhile, is equipped with AI-enabled analytics to keep track of our customers' behaviors and help us to manage our stock levels. Lazarev's team proved to be respectful, careful and imaginative throughout the project, not just a service provider, but a real partner. Since launch, both our traffic and sales numbers have significantly increased, evidence of their hard work and expertise.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsBuilding Brands for High Growth Companies
From cohesive brand systems to high-performing websites, to data-driven marketing strategies and content that resonates with diverse audiences, we deliver scalable solutions that help you lead; whether you're a mission-driven startup, an investor, an enterprise, or a nonprofit...
Top Services:
- Branding
- Web Development
- Web Design
- eCommerce Development
- WordPress Website Design
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $150/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 25 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsWunderdogs Services
Data sourced from the agency's DesignRush profileShell Aza (BitPesa) Zeitgold IBM UrbanUs Kraken LucidLink AIGA WILD Sophos Productions
Wunderdogs Reviews & Testimonials
Denis Bélanger's Review Sourced from Google
Be careful, this site always asks you for more money to be able to release funds. Stay away and do not put any money in. This company is fraudulent.
Roman Sobachevskiy's Review Sourced from Google
Wunderdogs created Mindrock’s visual identity, collateral templates, and our website. We loved working with them and would highly recommend their services — not only they are a great team of creative professionals, but also they know how to work with innovative, high-tech industries, which is a unique focus that served us very well.
Alisa Ellie's Review Sourced from Google
Wunderdogs built our website from scratch, set up marketing strategy and helped us break even in the first three months since launch.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsWe Automate Critical Business Processes.
Nzouat is an Oakland, California based digital consulting and development studio founded by Chris Nzouat. The agency which typically works with small to mid-size businesses and startups offers full-stack web and mobile development, blockchain (smart contracts, NFTs, DeFi), AI/ML integration, and digital...
Top Services:
- Blockchain
- Mobile App Development
- Software Development
- AI Development
- WordPress Website Design
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $150/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 13 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsNZOUAT Services
Data sourced from the agency's DesignRush profileAesthetic Lab Metroplex Multimedia Tony Alexander Election Campaign Aesthetic Studios Omega Health Clinics San Francisco Police Department (SFPD)
We Build Games That Players Love.
Double Coconut is a San Franciscobased boutique game development studio founded in 2012. The agency specializes in full-service game design and co-developmentfrom casual mobile and web titles to casino, mid-core, and Web3 games. Their projects have reached over 5 million players and generated...
Top Services:
- Software Development
- Web Design
- Mobile App Development
- Blockchain
- Show more
- Location
- San Francisco, California
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 8 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsDouble Coconut Services
Data sourced from the agency's DesignRush profileMicrosoft WB Cartoon Network Ellen Degeneres MIT IBM SAP iWin Addicting Games Penn Gaming
Custom software development firm
Greensighter is a full-cycle software development studio. We build custom software, AI agents, and MVPs...
Top Services:
- Mobile App Development
- Software Development
- AI Development
- Wearables
- IT Services
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 2 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsGreensighter Services
Data sourced from the agency's DesignRush profileSmelter 365 Data Science Bettin.gs E2 Recruiting Kapes Zaza Pay
Let Us Be Your Creative Partner
Code 9 Web Studios is a leading website design and development company and a top-tier IT solutions provider based in Dover, USA...
Top Services:
- Digital Services
- Web Design
- Web Development
- Mobile App Development
- Show more
- Location
- Los Angeles, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $1,000 - $10,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsCode 9 Web Studios Services
Data sourced from the agency's DesignRush profileDr. Autolock Metro Fence Black Car Connection
AI Power Agency and Development Shop.
Easiio build AI tools called ChatAI. We help our customers with these tools and implemented Large Language Model base AI technologies for their website or business software. Helping our customers do more with less and improve their efficiency. Our rate is very competitive with the help of AI and quality of...
Top Services:
- Web Design
- Web Development
- WordPress Website Design
- AI Development
- Mobile App Development
- Show more
- Location
- Santa Clara, California
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $30/hr
- Minimal Budget
- $1,000 - $10,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsEasiio Services
Data sourced from the agency's DesignRush profileSeraph Direct Weee SkyMeta Pfizer EcoSense TheAllStars TechThisOut Neuvition Harsco McDonals
Empowering Businesses Through AI- Driven Digital Transformation
Brightter is a global AI-driven digital transformation company based in San Francisco. We have partnered with forward-thinking businesses for over a decade to create exceptional digital experiences. Our expertise spans AI transformation, brand strategy, website development, web applications, and search engine...
Top Services:
- Digital Services
- Graphic Design
- Branding
- Digital Strategy
- Web Design
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $120/hr
- Minimal Budget
- $10,000 - $25,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsBrightter Inc. Services
Data sourced from the agency's DesignRush profileChase Oracle Opswat Novoed REI Corp Sephora Wells Fargo Mckesson Ikea The Coca-Cola Company
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
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsWeb Design Mechanic Services
Data sourced from the agency's DesignRush profileHeart Pressed MedTek RCM United Inc. Cryotherapy Guys
Web Design Mechanic Reviews & Testimonials

Web Development Review from Pam Baker
Written promises, undelivered work, and a takedown threat. I am 70 and have operated Custom Sports Cards (CSC) for approximately 25 years. This has been my worst business transaction. I contacted Web Design Mechanic in October 2025 solely for a website for my pet nonprofit. WDM proposed the CSC rebuild; I did not approach them for it. After my Trustpilot review, WDM threatened in writing to take my websites down unless I removed it within two hours. My project manager repeatedly confirmed in writing that he had everything needed. In December 2025, WDM wrote that everything was ready to launch; in January 2026, that the AI was ready. Yet in July, they emailed asking for more details about Pet Trading Cards and the membership site. CSC launched with serious problems and incomplete work. Pet Trading Cards and the membership site were not delivered. The written AI offer promised unlimited use without token limits or additional usage charges. WDM later wrote that this was not practical. I have neither the AI on the promised terms nor a refund. I consider this a bait-and-switch. WDM has not acknowledged wrongdoing. My contract specified three years of AWS hosting for $4,449. WDM wrote that the president was in a good mood and added two years. I later discovered my website's server was with OVHcloud and provided OVHcloud with WDM's AWS sales documents. Capital One declined my initial payment. A representative told me by phone that the decline related to numerous complaints associated with the merchant. WDM then sent a different PayPal link, which worked. The payment appeared under M & F Collaboration Inc., although I contracted with WDM. I am contacting the FBI to report suspected fraud involving the hosting and AI sales and will provide my contracts, payment records, and written communications. I paid based on written promises that remain unfulfilled. I cannot recommend WDM.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsReimagine Growth With Cutting-Edge App Development
VOCSO Technologies is an ISO 27001 certified web and mobile solutions company based in India, USA, and UAE. VOCSO Technologies is a one-stop web and mobile solutions agency, offers website design and development, mobile application design & development, and digital marketing services...
Top Services:
- Software Development
- Web Design
- eCommerce Development
- Digital Marketing
- SEO
- Show more
- Location
- Orange County, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $50/hr
- Minimal Budget
- Under $1,000
- Portfolios Count
- 1 Project Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsVOCSO Technologies Services
Data sourced from the agency's DesignRush profileRadvision World Consultancy Prakash Laser Consultease
VOCSO Technologies Reviews & Testimonials
Shivam Pal's Review Sourced from Google
vocso is a good company and all its members are supportive .fresher will get to learn a lot from this company
jyoti Bisht's Review Sourced from Google
I had an excellent experience with vocso technologies private limited. Their professionalism, expertise, and attention to detail exceeded my expectations. The team was highly responsive, delivered outstanding service, and ensured all my requirements were met efficiently. I highly recommend them to anyone looking for top-quality web development services. Looking forward to working with them again
Ankit Kumar's Review Sourced from Google
VOCSO Technology Pvt. Ltd. excels in web design, development, and digital marketing, delivering innovative and result-driven solutions.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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