Our expert analysts determined the best California Android app development agencies that build high performance and well-secured apps that drive user loyalty and engagement. You can filter listings by budget, size and reviews to select the best partner for your 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 offers solutions that transform ideas into dynamic digital experiences. Precision and creativity combine seamlessly in our mobile innovation and software crafting solutions, delivering intuitive interfaces and robust functionality that elevate user engagement and business growth...
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

Mobile App Development Review from Elvera Kaparchuk
SaveIT is receipt management on autopilot. You connect your email once, and we import your receipts, extract every line item with AI, categorize it, and sync it with QuickBooks. The AI isn't a feature of the product, it is the product. If it reads a receipt wrong, everything downstream is wrong. We brought Diffco in to work on that core. Since April they've worked on our AI models, fixed security problems in the platform, and helped us build a real strategy around where AI belongs and where a conventional solution is the better call. The most important change was measurement: extraction accuracy is now a number we evaluate every change against, instead of something we judge by trying a handful of receipts. They were also honest in a way I didn't expect from an AI firm. When we assumed a problem needed a stronger model, they showed us it was in our data. That saved us time and money. They continue to support the AI side of the product, and they're easy to work with; direct, technically deep, and clear about trade-offs.

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.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsTrusted IT Partner for SMBs & Enterprises Since 2001 | Dedicated Teams | Industry-Specific Solutions
Altoros is a 350+ person strong IT consulting and development group. For over 20 years, we've been assisting Global 2000 organizations in getting software products to market faster and reducing the cost of R&D experiments to enable stable business growth...
Top Services:
- Software Development
- Mobile App Development
- Web Design
- Web Development
- Staff Augmentation
- Show more
- Location
- Pleasanton, California
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 12 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsAltoros Labs Services
Data sourced from the agency's DesignRush profileSiemens Toyota Hitachi Huawei Denso LikeFolio Dealflo iFit Walmart EQ Bank
Altoros Labs Reviews & Testimonials

Software Development Review from Daria Stolyar
We hired Altoros engineers as an essential extension of our client-facing internal teams. This was a tough decision because our reputation as a brand depends on the overall efficiency of our processes and we needed to make sure all risks are mitigated when it comes to delivery. Altoros has not let us down.Together with Altorosians we successfully deployed a number of tough and technologically complex projects on time. So our collaboration is certainly set to continue.

Software Development Review from Victoria Lewis
We enjoy working with our team, Roman Yurkin, Tatyana Kobzar, Svetlana Kalchanka and Tatiana Anop. They bring expertise and immense value to our business with each piece of work they complete. They are a major part of our business development and delivery.

Ruby on Rails Review from Greg Lipper
In my 30 years in the software business, I have never had as positive an experience with an outsourced development services provider as I have with Altoros. Each Altoros engineer we have worked with has been strong technically, estimated development times accurately, completed projects on time, and delivered code and projects with high quality. Beyond that, they have helped improve our thinking and approach with suggestions and ideas that were better than the spec of instructions we supplied.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsAffordable & Creative Design Company
Pace Digital is a cutting-edge digital marketing agency offering innovative solutions for businesses. With expertise in SEO, social media marketing, web design, and more, we help clients optimize their online presence and drive targeted traffic. Our team of experts utilizers data-driven strategies to deliver...
Top Services:
- Web Development
- Mobile App Development
- Web Design
- eCommerce Development
- Branding
- Show more
- Location
- Oakland, California
- Number of Employees
- 1000 & Up
- Average Hourly Rate
- $70/hr
- Minimal Budget
- $25,000 - $50,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsPace Digitals Services
Data sourced from the agency's DesignRush profileFantasy of Flight Jet Edge Bill Hansen Catering
Pace Digitals Reviews & Testimonials

Video Production Review from Nancy
I've had the pleasure of witnessing Pace Digitals exceptional creativity and expertise in bringing ideas to life through animation. Their ability to convey complex concepts with visual storytelling is nothing short of impressive. Pace Digitals’ video animation consistently delivers engaging and visually stunning animations that captivate audiences and effectively communicate messages.

SEO Review from Christopher
The impact of Pace Digital's SEO service was not only noticeable but also transformative. The surge in international website traffic, improved search engine rankings, and enhanced global customer engagement reinforced the efficacy of their approach. Beyond the numbers, their service has played an instrumental role in positioning my brand as an authority on a global scale.

Logo Design Review from Nathaiel Lai
Pace Digitals truly exceeded my expectations with their logo design services. Their creative team demonstrated a deep understanding of our brand vision and translated it into a captivating and unique logo. Communication was seamless throughout the process, and they delivered the final design promptly.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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