Our expert analysts have ranked the best eCommerce development companies in California that build intuitive online stores to help you turn visitors into paying customers. Filter them by portfolios, budget, client reviews, industry reputation and more to find the right fit for your brand.
Best California eCommerce Development Agency Rankings
12 Companies-Rankings updated: September 05, 2026
All agencies are evaluated on DesignRush for demonstrated expertise and authentic client reviews to support your decision. Certain placements are paid.
VerifiedVerified by the DesignRush team for authenticity and credibility.
Your trusted AI software development partner
Diffco builds Magento and Shopify web stores for retail and eCommerce clients, including grocery delivery platform Food Rocket, from its Silicon Valley base. The 2008-founded eCommerce company also specializes in AI and custom software development, having delivered 1,150+ projects overall...
Top Services:
AI Development
Software Development
Staff Augmentation
Mobile App Development
Web Development
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Location
San Jose, California
Number of Employees
50 - 99
Average Hourly Rate
$110/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
31 Projects Listed
Diffco Services
AI Development
Software Development
Staff Augmentation
Mobile App Development
Web Development
eCommerce Development
IoT
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Mars
Food Rocket
FlashGrid
Nokia
Instreamatic
Quire
Legionfarm
Latoken
Genius One
Shift
Data sourced from the agency's DesignRush profile
Diffco Reviews & Testimonials
Oleg Sotnikov
CEO at AppMaster
5.0★
AI Development Review from Oleg Sotnikov
Diffco built a complex, production-grade AI agentic system and backend for our client's fintech platform owning architecture, AI/ML components, and AI agents in a security- and compliance-sensitive environment. They delivered on time and within budget, communicated proactively, and operated like part of our own team, taking ownership and suggesting better solutions throughout. Deep AI/ML and senior backend expertise. We'd happily work with them again.
Julia Platova
VP Strategic Partnerships at OVA Solutions
5.0★
Mobile App Development Review from Julia Platova
We partnered with Diffco for a comprehensive software development project aimed at delivering a mobile application and backend system for our client.
The goal was to create a seamless, secure, and scalable solution within a 4-month timeline and $50k-$200k budget.
Diffcos team was highly professional from start to finish. They handled everything: UI/UX design, backend architecture, API integration, and deployment.
After the launch, they continued to support us with maintenance and performance optimization.
The application received positive feedback and has proven stable and scalable.
Were highly satisfied with Diffcos expertise, commitment, and ability to deliver real results.
Max Shmatkov
Manager at Centerligh
5.0★
Mobile App Development Review from Max Shmatkov
As an advantage of working with this company I’d like to note that their Agile development method is amazing! Diffco earned my trust through such approach and the team’s professional attitude.
Reviews verified by DesignRush and sourced from the agency's profile
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Simform is a premier digital engineering company specializing in Product Engineering, Cloud, Data, Agentic AI, and Enterprise Platform Innovation. We help enterprises and high-growth ISVs build digital experiences and scalable, enterprise-grade products what work at scale...
Top Services:
Software Development
Cloud Consulting
AI Development
Big Data Analytics
DevOps Consulting
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Location
Los Angeles, California
Number of Employees
1000 & Up
Average Hourly Rate
$30/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
8 Projects Listed
Simform Services
Software Development
Cloud Consulting
AI Development
Big Data Analytics
DevOps Consulting
IoT
eCommerce Development
UI/UX Design
IT Services
Managed Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Sony Music (EMI)
Pepsico
Zep Inc
Intralinks
Nxt-ID
FreeWire Inc
Accent Inc
Mission Rabies
DoggyBnB
Drizzle Labs
Data sourced from the agency's DesignRush profile
Simform Reviews & Testimonials
Andrew Muroff
CEO at Strainprint Technologies Ltd.
5.0★
Software Development Review from Andrew Muroff
We worked with Simform for many years ongoing software development on our core product, the Strainprint mobile outcomes tracker for medical cannabis patients. We have only positive things to say about their work product and attention to detail. We highly recommend them and will work with them again.
Robel Yemane
Head of Engineering at Privilee
5.0★
Software Development Review from Robel Yemane
I've been working with Simform for over six months now. The engagement began with bringing our subscription management platform in-house, and we've since expanded the partnership to other projects due to their broad skill set and consistent reliability. They've gone the extra mileeven over weekends and public holidaysto help us move faster when needed. Communication and project management have been excellent, with any issues swiftly addressed. It genuinely felt like Simform was invested in our success. Having worked with similar firms throughout my career, I can confidently say Simform stands out and comes highly recommended.
Russ Makhauri
Front-End Engineer at Midas
5.0★
Software Development Review from Russ Makhauri
We worked with Simform to hire a front-end engineer for our SaaS platform. The process was well-organized, and their team was professional, responsive, and efficient. They quickly identified a candidate who met our technical requirements and ensured a smooth onboarding process.
Simforms communication and project management were strong throughout the engagement. They were proactive in addressing feedback and remained flexible in adapting to our needs. While there is some room for improvement in developer vetting and quality assurance, their overall service was excellent.
For companies looking to scale their development teams efficiently, Simform is a reliable partner. Their structured approach, responsiveness, and commitment to client satisfaction make them a great choice. We would recommend them without hesitation.
Reviews verified by DesignRush and sourced from the agency's profile
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We have been working with Dinarys on our Shopify store for quite some time, and the experience has been great. From the very beginning, communication was clear, efficient, and reliable. The Dinarys team consistently delivered detailed proposals, stuck to agreed timelines, and offered well-structured solutions tailored to our needs. Their technical expertise is impressive, but what really sets them apart is their proactive attitude and genuine commitment to our project. Whenever we had questions or changes, they responded quickly and constructively. Its a true pleasure to work with a partner who feels like an extension of our own team. Highly recommended!
Nissrine Kohen
Sr. Backend Shopware Developers at H1 Webdevelopment
4.5★
Web Development Review from Nissrine Kohen
Weve been working with Dinarys for quite some time now, mainly collaborating on Magento and Shopware development projects. Their developers consistently show solid technical expertise and a good understanding of our expectations and workflow.
Communication is generally smooth, and response times are quick. Whenever issues arise, the team is open to feedback and acts quickly to improve. Over time, weve seen a positive evolution in their proactiveness and alignment with our teams way of working.
They are flexible and collaborative, and its clear that they genuinely aim to build long-term partnerships. For the quality delivered, we feel the pricing is fair and transparent.
All in all, weve been satisfied with our cooperation and would recommend Dinarys as a development partner, especially for companies looking for experienced backend developers in Magento and Shopware.
Andrew White
Review from Google
5.0★
Andrew White's Review Sourced from Google
I'm wasn't in the German office, but i had experience of communication with this company! I can say that it leaves the warmest feelings in the my heart! Guys you are the best!
Reviews verified by DesignRush and sourced from the agency's profile
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The best eCommerce development company empowering you with the tools you need to conquer your industry...
Top Services:
Wearables
VR/AR
Mobile App Development
Software Development
eCommerce Development
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Location
Pleasanton, California
Number of Employees
250 - 499
Average Hourly Rate
$35/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
11 Projects Listed
Folio3 Services
Wearables
VR/AR
Mobile App Development
Software Development
eCommerce Development
IoT
Web Design
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Lioher - Magento B2B Solution
TJM
Flexiglass
Trilink
Colgate-Palmolive
Standard Chartered
Zoetis
Mercedez Benz
Barnes and Noble
Merck
Data sourced from the agency's DesignRush profile
Folio3 Reviews & Testimonials
Irshad
Customer Account Executive at Fairsquare UK
5.0★
Web Development Review from Irshad
I am very happy about how Folio3 gives 100% in the work dedication and has a very organized and energetic team who thrive with innovative ideas for our business. We are still using Folio3 on a regular basis and also get excellent updates from any usage left so that we can utilize our monthly allowance which is great teamwork.
Mike Do
CTO at Barnes & Noble
5.0★
Web Development Review from Mike Do
Whether it’s a new development, update or maintenance – Folio3 always shines through. Their turnaround time is always stellar, it’s a pleasure to work with them.
Stewart Kelly
Founder & CTO at SideStep
5.0★
Software Development Review from Stewart Kelly
They have helped us manage and execute the bulk of the engineering work necessary for integrating with our partners in the Airline, Car and Hotel verticals.
Reviews verified by DesignRush and sourced from the agency's profile
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Sleepless Media is driven by a deep passion for meticulously creating comprehensive brand experiences that revolve around bespoke and adaptable Shopify websites...
Top Services:
WordPress Website Design
Web Development
Web Design
eCommerce Development
Logo Design
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Location
Soquel, California
Number of Employees
Under 49
Average Hourly Rate
$175/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
24 Projects Listed
Sleepless Media Services
WordPress Website Design
Web Development
Web Design
eCommerce Development
Logo Design
Graphic Design
Branding
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Levis
Swisher Sweets
Heartland RVs
August Home
Lenny and Larry's
Island Stone
Sanders Candy
Clearly Filtered
Zpacks
Arlen Ness
Data sourced from the agency's DesignRush profile
Sleepless Media Reviews & Testimonials
Webman Technologies
Review from Google
5.0★
Webman Technologies's Review Sourced from Google
Sleepless Media did an outstanding job on our Shopify project. Their team combines creativity with deep technical expertise, making the whole process smooth and stress-free. They truly understood our brand, designed a store that looks stunning, and optimized it for performance and sales. Communication was always clear, deadlines were met, and they went above and beyond to deliver a result that exceeded our expectations. If you’re looking for a reliable partner for Shopify design and development, Sleepless Media is the perfect choice. Highly recommended!
Barry Pinto
Review from Google
5.0★
Barry Pinto's Review Sourced from Google
Sleepless Media is the kind of web design agency that I've been wanting to work with for years. My company's website was in severe need of a redesign, and we knew that it was going to be a complicated project in terms of content migration, customizations, and attention to detail. I also needed a design agency that could work hand in hand with our SEO people. Fortunately I found Jon and team, who are not only extremely talented web designers but great listeners as well. Also a very patient team - we were far from a well prepared client in terms of having our site content ready to go, but they made the upgrade happen for us regardless. If you have been thinking about a redesign and need a Shopify partner that you can trust, this is your agency. Highest recommendation, and I plan on sending them all of our future web development business.
Victoria Comeau
Review from Google
5.0★
Victoria Comeau's Review Sourced from Google
I reached out to Sleepless Media after the company I originally chose to work with to transition from BigCommerce to Shopify did an awful job. What was supposed to be a three month project was now a year and a half nightmare. The team at Sleepless Media was so knowledgeable, transparent, communicative, and just amazing to work with. If I needed any clarification on anything, they didn’t hesitate to offer to hop on a call with me to make sure I knew what was going on. Every member of the team I have interacted with has been nothing but amazing. I can’t recommend Sleepless Media enough. The work they do is top notch, and worth every dollar. If you work with them, you know the project is going to be done and it’s going to be done exceptionally.
Reviews verified by DesignRush and sourced from the agency's profile
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We pride ourselves on delivering innovative, digital experiences that make an impact. Since 2012, weve proudly partnered with start-ups, SMBs, Fortune 500 companies and everyone in between to unlock value through creativity, technology, and business-minded thinking...
Top Services:
Web Design
Web Development
Branding
WordPress Website Design
eCommerce Development
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Location
Los Angeles, California
Number of Employees
100 - 249
Average Hourly Rate
$125/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
4 Projects Listed
Big Drop Services
Web Design
Web Development
Branding
WordPress Website Design
eCommerce Development
SEO
PPC
Digital Marketing
Content Marketing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Semperis
Bank of China
Altice
NYC Health + Hospitals
AMC Networks
Northwell
Moroccanoil
Dataiku
Samsung
Citi
Data sourced from the agency's DesignRush profile
Big Drop Reviews & Testimonials
Brian Yokely
VP, Marketing at Strive Health
5.0★
Web Design Review from Brian Yokely
It isn't often that you find a partner like Big Drop and I cannot recommend their fantastic team highly enough. Projects like ours are no small feats and their dedication to producing a successful outcome for us is unparalleled by other agencies. In addition to superior project management, their creative and strategic teams leveraged our brand to develop an aesthetic that is absolutely first-in-class, with functionality to match, and we couldn't have done it without them. I look forward to expanding our collaboration in the future. We needed a website refresh, and Big Drop helped us produce the best possible product. The team's professionalism and expertise were evident throughout the project, resulting in a website that exceeded our expectations. Working with Big Drop was a smooth and productive experience, and we were thrilled with the outcome of our collaboration.
Michele Zappula
AVP, Marketing Ops at Semperis
5.0★
Branding Review from Michele Zappula
Big Drop 100% gets who we are and what we need and we trust them completely. Their creative process is iterative and comprehensive, and have become a true extension of our team who has been fortunate to work with their top talent. We are consistently impressed by how well Big Drop brings forward concepts and ideas that have evolved our products and brand, and together, we have delivered some truly amazing items. I have been waiting to work with them, and it has easily been worth the wait. Working with Big Drop was instrumental in refining our brand identity and creating new digital properties. The agency polished our main brand and refreshed two sub-brands. It also developed four new digital assets. The team's creative vision and ability to interpret our goals were pivotal in achieving our desired outcomes. Big Drop's flexibility, knowledge, and commitment ensured it made adjustments to suit our specific needs.
Tiffany Carrell
Scaled Onboarding Experience at Square
5.0★
Web Development Review from Tiffany Carrell
We engaged Big Drop to develop a new platform for our Academy community to enhance user experience. From the onset, the agency's commitment to understanding our community's needs has been evident, leading it to craft a tailored plan to address challenges faced by our sellers. Big Drop's proactive approach and dedication to delivering exceptional results guided our engagement, resulting in shared success without encountering any issues during the collaboration. We have been incredibly satisfied with Big Drop, hands down.
Reviews verified by DesignRush and sourced from the agency's profile
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At eQuality Software, we create digital solutions that drive real impact. With over 14 years of experience in mobile app development, our team specializes in designing and delivering scalable, intuitive, and high-performance applications tailored to your business goals...
Top Services:
Mobile App Development
Blockchain
VR/AR
eCommerce Development
IoT
Show more
Location
San Francisco, California
Number of Employees
50 - 99
Average Hourly Rate
$100/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
13 Projects Listed
Equality Software Services
Mobile App Development
Blockchain
VR/AR
eCommerce Development
IoT
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Pacaso
Health Monitor
Ivy Wallet: Money Manager
YottaChat
Plamfy: Live Stream Video Chat
Gronda - For Chefs
The Fork - Restaurant Bookings
Zalora - Online Fashion Shopping
Flexigo
InterNations
Data sourced from the agency's DesignRush profile
Equality Software Reviews & Testimonials
Clara Armani
Review from Google
5.0★
Clara Armani's Review Sourced from Google
Thanks to Equality Software, our travel app now provides users with the perfect travel experience. The app is user-friendly and full of useful features that keep customers coming back.
Reviews verified by DesignRush and sourced from the agency's profile
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As a woman-owned WordPress web design and development company, we specialize in building high-impact custom websites for environmentally conscious, social justice-oriented, and purpose-driven companies. With our expertise in WordPress, we provide full control over website editing and maintenance...
Top Services:
Web Development
UI/UX Design
eCommerce Development
Web Design
SEO
Show more
Location
Oakland, California
Number of Employees
Under 49
Average Hourly Rate
$175/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
14 Projects Listed
Mangrove Services
Web Development
UI/UX Design
eCommerce Development
Web Design
SEO
Digital Marketing
Branding
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Mighty Networks
Wikimedia
Clover-Sonoma
Off the Grid
Fivestars
The Grove SF
FactoryOS
Brightwheel
Beneficial State Foundation
Data sourced from the agency's DesignRush profile
Mangrove Reviews & Testimonials
Marisa Belaski-Farias
Review from Google
5.0★
Marisa Belaski-Farias's Review Sourced from Google
Mangrove has great people, who do great work. I initially collaborated with them at a tech company where they completely revamped our WordPress site. Recently, I engaged them to work with the headless CMS Sanity. In both cases, I primarily interacted with their account managers and developers.
First, their project management is invaluable, especially for small teams like ours. Having a reliable point of contact to ensure we meet deadlines and stay on top of hours is crucial.
Second, their developers are exceptional. They consistently exceed our expectations, offering valuable suggestions and going the extra mile to address any uncertainties.
Overall, Mangrove's work has consistently impressed me and my teams, helping us achieve a wide range of marketing objectives.
World Affairs Communications
Review from Google
5.0★
World Affairs Communications's Review Sourced from Google
Prior to connecting with Mangrove, our organization’s website hadn’t properly been updated in years. After having revamped our organizational mission and branding, we needed a complete redesign to reflect our new direction and goals. It was a tall order given that we had years worth of events, broadcasts and other content to consolidate. Mangrove took the project head on and their team understood our needs from the beginning. Their approach was thoughtful and their team was organized, knowledgeable and responsive to our feedback and requests. The finished product is exactly what we had hoped for, and our website now perfectly reflects our revised brand. We couldn’t be happier with the Mangrove team and would recommend them to any mission-driven organization.
Mika Weinstein
Review from Google
5.0★
Mika Weinstein's Review Sourced from Google
We are looking forward to enjoying the added credibility that comes from having a professional website and easier access to information by our clients. Everyone helping us with this project provided excellent guidance, and the mini video vignettes training us on the WordPress site’s background were perfect.
Reviews verified by DesignRush and sourced from the agency's profile
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i95Dev is your one-stop-shop for all your customer experience, eCommerce, and integration needs. We specialize in designing, developing, and maintaining B2B/B2C integrated omni-channel eCommerce solutions on Magento, Shopify, and BigCommerce. Our products and solutions are designed to enable clients to reach...
Top Services:
eCommerce Development
Digital Marketing
Location
Burbank, California
Number of Employees
500 - 999
Minimal Budget
$25,000 - $50,000
i95Dev Services
eCommerce Development
Digital Marketing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Kwanso, recognized as a top 5 mobile company by Silicon Review, is a team of expert designers, developers, machine learning engineers, and consultants dedicated to building exceptional digital experiences...
Top Services:
Software Development
Mobile App Development
AI Development
eCommerce Development
Show more
Location
San Francisco, California
Number of Employees
Under 49
Average Hourly Rate
$40/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
5 Projects Listed
Kwanso Services
Software Development
Mobile App Development
AI Development
eCommerce Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Whirlpool
Craftsman
Gladiator
Kenmore
RealREPP
TrueReview
College Advisor
BioMarker
Uptok
Bushnell
Data sourced from the agency's DesignRush profile
Kwanso Reviews & Testimonials
Full Circle Healthcare Solutions
Review from Google
1.0★
Full Circle Healthcare Solutions's Review Sourced from Google
Although I have responded to be removed from this person‘s spamming emails, they still continue to email me over and over again. This is borderline rude and an excusable since I have responded to those emails to be opted out. Regardless of the business the way that you represent it is not how I do business. Normally I don’t leave responses but after three or four times of receiving the same emails when requesting to be opted out I figured this was the best place to post.
Reviews verified by DesignRush and sourced from the agency's profile
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Your Premier iPad App Development & Marketing Studio
Wve Labs is an elite iPad app development and marketing studio, leveraging the power of the latest Swift language through Xcode. Serving a broad spectrum of clients, our team's synergy, rapid execution, and transparent communication make us the go-to choice for businesses seeking an enhanced digital...
Top Services:
Mobile App Development
Blockchain
AI Development
Software Development
VR/AR
Show more
Location
Newport Beach, California
Number of Employees
Under 49
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
5 Projects Listed
Wve Labs Services
Mobile App Development
Blockchain
AI Development
Software Development
VR/AR
UI/UX Design
Web Development
Graphic Design
Digital Marketing
Logo Design
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Sony
Maui Jim
Honda
Guardian
Com-Power
VIZI
Crave on Campus
Bonfire
The Now
Super Gems Jewelry
Data sourced from the agency's DesignRush profile
Wve Labs Reviews & Testimonials
delaney day
Review from Google
5.0★
delaney day's Review Sourced from Google
I have had the pleasure of working at Wve Labs for over a year now, and it has been an absolutely amazing experience. The leadership is dedicated to ensuring each employee’s success and is highly focused on the company’s growth. Being part of such a dynamic and diverse team with a fantastic client base makes me proud.
The company offers numerous opportunities for professional development, and the collaborative atmosphere encourages innovation and creativity. Every day presents new challenges and learning opportunities, making the work both engaging and fulfilling.
Additionally, Wve Labs prioritizes community involvement and social responsibility, frequently organizing events and initiatives that give back to society. This comprehensive approach not only enriches our corporate culture but also instills a sense of contributing to a larger cause.
In conclusion, my time at Wve Labs has been extremely fulfilling, and I look forward to the future as we continue to grow and innovate together.
Jack Joyce
Review from Google
5.0★
Jack Joyce's Review Sourced from Google
Working at Wve Labs has been an incredible experience, and I can't speak highly enough about the company's atmosphere and culture. From the moment I joined, I was welcomed into a collaborative and supportive environment where creativity and innovation are not just encouraged but celebrated.
The culture at Wve Labs is one of inclusivity and respect. Every team member's ideas are valued, and there's a strong sense of camaraderie that makes coming to work each day a pleasure. The leadership team is approachable and genuinely cares about the growth and well-being of every employee, fostering a workplace where people feel motivated to do their best.
Wve Labs truly excels in creating a positive and dynamic work environment. The office is buzzing with energy, driven by passionate individuals who are dedicated to delivering top-notch results. The company also offers numerous opportunities for professional development, which has allowed me to expand my skill set and grow in my career.
Anthony Cecere
Review from Google
5.0★
Anthony Cecere's Review Sourced from Google
I've been at Wve Labs now for 4+ years and have enjoyed working here! I appreciate my team and their diligence to our work. I have had the pleasure of managing several projects and find Wve to be a great place to work and grow as an individual.
Reviews verified by DesignRush and sourced from the agency's profile
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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
DECOSTA Global Services
Digital Services
Branding
Creative Services
Product Design
Digital Strategy
Web Design
WordPress Website Design
Mobile App Development
eCommerce Development
SEO
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts