Top ecommerce development companies in California

Selecting the right e-commerce development company is crucial for businesses looking to establish or enhance their online presence. With its tech-savvy environment and abundance of innovative firms, California offers many options. Our research outlines key considerations and provides essential tips to help you choose California's best e-commerce development partner.
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4.9 out of 5, based on 593 real reviews.
Rankings updated: May 03, 2026

List of top-rated California Ecommerce Development Companies

Certain agencies may be featured through sponsored placements. Rankings and SF Scores remain unbiased and are based solely on our evaluation methodology.

303 Companies

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SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

1

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 10% Ecommerce Development

  • 20% Mobile App Development

  • 20% Software Development

  • 20% Web Development

  • 10% Web Design

  • 10% AI Development

  • 10% Digital Marketing

Form Follows Function

IMRepublic, founded in 2005 with offices in San Francisco, CA, and Belgrade, Serbia, is a full-stack software development and design agency delivering tailored digital solutions for businesses of all sizes. We specialize in custom software development, enterprise systems, and process optimization to help clients achieve measurable growth. Our client-focused approach combines assessment, design, development, and optimization. We collaborate closely with your team to align technology solutions with business goals, leveraging the latest globally-adopted frameworks and languages while respecting your existing infrastructure. From backend, frontend, and middleware development to complex enterprise integrations, our experienced team advises on the most efficient technology stack to maximize ROI. Whether you need custom software to solve unique business challenges or enhancements to existing systems, IMRepublic provides agile, reliable, and scalable solutions that drive results and streamline operations. We are committed to client success, delivering innovative, high-quality software that boosts performance and revenue.

View IM Republic, Inc Profile
Inside Service Listing

$50-$99/hr

Hourly Rate
Inside Service Listing

$5,000+

Min. Budget Size
Inside Service Listing

10 - 49

Team size
Inside Service Listing

San Francisco, USA

Location

1

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

1

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 10% Ecommerce Development

  • 40% Web Design

  • 40% CMS

  • 10% IT Services

Websites that boost sale

We are an award-winning web design and development agency based in Oakland, CA, specializing in building high-performance WordPress and Drupal websites for organizations focused on growth. Since 2010, we’ve partnered with professional services firms, nonprofits, and eCommerce businesses to create scalable digital platforms that generate leads, increase conversions, and strengthen online presence. Our approach combines strategic planning, UX/UI design, and custom development to deliver engaging, user-focused websites. From initial discovery to launch, we follow a structured, collaborative process that ensures clarity, efficiency, and on-time delivery. Beyond launch, we provide ongoing website maintenance, security, and optimization services to keep your platform running smoothly and securely. With deep industry expertise across finance, education, nonprofit, and eCommerce sectors, we deliver tailored digital solutions designed to achieve measurable business results and long-term success.

View State Creative Profile
Inside Service Listing

$100-$149/hr

Hourly Rate
Inside Service Listing

$10,000+

Min. Budget Size
Inside Service Listing

2 - 9

Team size
Inside Service Listing

Oakland, USA

Location

1

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

1

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 10% Ecommerce Development

  • 10% Mobile App Development

  • 10% Software Development

  • 10% Web Development

  • 10% Web Design

  • 10% IT Services

  • 10% Blockchain Development

  • 10% Internet of Things

  • 10% AI Development

  • 10% Business Services

Where AI transforms ideas into intelligent, future-ready experiences

Asapp Studio is a digital product development company focused on creating engaging, user-centric applications that turn users into loyal customers. We specialize in building high-performance mobile apps (iOS and Android), web applications, and desktop solutions designed to deliver exceptional user experiences and measurable business results. Our approach combines UX/UI design expertise with strong engineering practices to craft intuitive, visually appealing, and scalable products. We go beyond functionality—focusing on user behavior, seamless interactions, and brand alignment to ensure your product stands out in competitive digital markets. From idea validation and product strategy to design, development, and launch, Asapp Studio provides end-to-end services tailored to your goals. We work closely with clients to understand their vision and translate it into impactful digital solutions that drive engagement and retention. With a commitment to quality, innovation, and collaboration, Asapp Studio acts as a true technology partner—helping businesses build memorable digital experiences that strengthen brand identity and support long-term growth.

View Asapp Studio Profile
Inside Service Listing

$50-$99/hr

Hourly Rate
Inside Service Listing

$5,000+

Min. Budget Size
Inside Service Listing

10 - 49

Team size
Inside Service Listing

Temecula, USA

Location
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Buyer's Guide

Essential Things to Look for When Choosing an eCommerce Development Firm

Experience in the Industry

Seek out businesses with extensive experience in your sector. Their understanding of problems and solutions unique to your sector can greatly improve the efficiency of your eCommerce platform.

Technological Skills

Ensure the company knows the newest eCommerce platforms and technologies, such as BigCommerce, WooCommerce, Shopify, and Magento. Their technological expertise needs to match the demands of your project.

Case Studies and Portfolios

Evaluate the company's case studies and portfolio to determine its design and development skill level. Look for projects comparable to yours in scale and intricacy to evaluate their skill.

Ability to Customize

It's important to have the capacity to modify your eCommerce platform to satisfy particular business needs. Assess the company's ability to design specialized solutions that improve usability and functionality.

Integration Services

E-commerce platforms often need integration with other systems, such as payment gateways, ERPs, and CRMs. To simplify your operations, ensure the provider has a seamless integration experience.

User Experience and Design

A design that is aesthetically pleasing and easy to use can greatly impact customer engagement and sales. Analyze the company's attention to improving user experience and design aesthetics.

Marketing and SEO Services

Search engine optimization (SEO) is necessary for an eCommerce website to attract organic visitors. Verify whether the company offers SEO services and has a digital marketing plan to increase your online visibility.

Assistance and Upkeep

Post-launch assistance is essential to your eCommerce site's seamless operation. Make sure the business provides thorough maintenance and support services so that any problems can be resolved quickly.

Customer Evaluations and feedback

Client feedback can offer insightful information about the dependability and calibre of the business's services. Look for reviews and suggestions about the business's reputation and customer satisfaction.

Value for Money and Pricing

Although money is an important consideration, it shouldn't be the only one. Check the business's pricing strategy to ensure it provides value for the money regarding the services and quality offered.

How to Select the Best eCommerce Development Firm

Establish Your Needs

Give a clear description of your target market, company objectives, and the features you require from your eCommerce platform. With a clear set of requirements, you can interact more efficiently with possible development partners.

Investigation and Enumeration

Conduct in-depth research to find prospective eCommerce development companies in California. Make an initial list using online directories, reviews, and suggestions.

Review Proposals

Request quotations from companies from the shortlisted companies. Assess them according to how well they understand your needs, suggested fixes, budgets, and schedules.

Author Profile & Expertise

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Head Of Digital Marketing at SelectedFirms

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