Our expert analysts ranked the top product design companies in California that create multiple product categories such as apps, digital platforms, physical products and more to help your brand stand out and engage new audiences. Filter by price, reviews, portfolios and more to select a partner that best fits your business needs.
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.
Your trusted AI software development partner
Diffco is a San Francisco AI-first software engineering partner for growth-oriented teams. We embed senior engineers and product strategists who turn AI vision into shipped, revenue-driving products. Our team has spent the last 18 years building: SaaS platforms, web & mobile apps, and AI products...
Top Services:
- AI Development
- Software Development
- Staff Augmentation
- Mobile App Development
- Web Development
- Show more
- 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
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsDiffco Services
Data sourced from the agency's DesignRush profileMars Food Rocket FlashGrid Nokia Instreamatic Quire Legionfarm Latoken Genius One Shift
Diffco Reviews & Testimonials

AI Development Review from Ivan Pasichnyk
We brought Diffco in to deliver the AI and computer vision components for one of our clients, an image generation startup. Because the work sat inside our own client relationship, we needed a partner we could trust to operate at our standard without us managing them day to day - and that is exactly what we got. Diffco owned the technical approach, built the computer vision and AI layer, and delivered the full scope in three months, on schedule. The engineering quality was high, they raised the right questions early instead of late, and they handled the confidentiality the project required without us having to chase it. After delivery they stayed on to support the system, which mattered to us as much as the build itself. When you subcontract a technical project inside your own client relationship, the risk is that the partner makes you look bad. Diffco did the opposite. They've earned our trust and we'd work with them again.

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.

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.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsCreating Long Lasting Value For Your Business
Digital Solutions is a full-service UI | UX, Website Development, and Application Development Agency located in Irvine, California...
Top Services:
- Design Services
- Web Design
- Product Design
- Web Development
- WordPress Website Design
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- Location
- Irvine, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $150/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 8 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsDigital Solutions Services
Data sourced from the agency's DesignRush profileSmartProp Trader dot.LA Founders' Guide FACT Global WeCamped Rello
Digital products. Done beautifully.
Wve Labs is a digital product company bringing strategy, design, and engineering together to create mobile apps, web platforms, and custom software. Since 2015, we have partnered with startups, growth companies, and global organizations to design, build, and scale digital products...
Top Services:
- Mobile App Development
- Software Development
- UI/UX Design
- Product Design
- Web Development
- Show more
- Location
- Costa Mesa, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 5 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsWve Labs Services
Data sourced from the agency's DesignRush profileSony Honda Guardian Maui Jim Com-Power VIZI Super Gems Jewelry The Now Bonfire Crave on Campus
Wve Labs Reviews & Testimonials
Brayden Yarbrough's Review Sourced from Google
Working with Wve Labs has been an outstanding experience. Their communication is exceptional—they keep me informed throughout every stage of the process and are always quick to answer questions and provide thoughtful feedback.The app design has exceeded my expectations, and they consistently stay on track with the timelines they set. What really sets Wve Labs apart is their ability to brainstorm and collaborate. They don't just build my app—they help refine my ideas, offer creative solutions, and provide valuable insights that continue to make the final product even better.It's clear that their team consists of true experts in digital product development. Whether it's strategy, design, or technical execution, they bring a level of professionalism, creativity, and expertise that's hard to find. I'm excited to continue working with them and highly recommend Wve Labs to anyone looking for a development partner that genuinely cares about the success of their project.Founder, GameDay Bites
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'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.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsXr Simulation & Spatial Computing
Prefixa is a 3D visualization and extended reality (XR) agency specializing in immersive solutions such as VR, AR, product configurators, and spatial computing simulations. Serving industries from aerospace and architecture to automotive and space robotics, Prefixa builds interactive experiences that enhance...
Top Services:
- VR/AR
- Product Design
- Location
- Sunnyvale, California
- Number of Employees
- Under 49
- Minimal Budget
- $25,000 - $50,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsPrefixa Services
Data sourced from the agency's DesignRush profileOOX Lenovo Sculpture Forest Emaar
Skin In The Game
Threefifty is a leading CRO agency known for delivering rapid, measurable growth through data-driven optimization strategies. By leveraging proven insights and personalized conversion techniques, the agency helps high-profile clients maximize revenue and improve performance across digital channels...
Top Services:
- UI/UX Design
- Web Design
- Web Development
- Creative Services
- Branding
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $350/hr
- Minimal Budget
- $25,000 - $50,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsThreefifty Services
Data sourced from the agency's DesignRush profileAOL Microsoft Autodesk IBM Aecon Oaklu
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