
Diffco
ReviewCustom software, AI development, and staffing for startups and established brands.

Clients
About Diffco
Diffco is a San Jose-based software development firm founded in 2008, specializing in custom software, mobile and web applications, AI development, and IT staff augmentation. Over 17 years, the company has built products used by American Express, Starbucks, Whole Foods, and Mars, alongside a range of venture-backed startups. With a team of 50 to 249 engineers and designers, Diffco runs dedicated project teams with no cross-project resource sharing. Most client engagements fall in the $50,000 to $199,999 range, and the firm holds a Premier Verified badge on Clutch with a 5.0 rating across 31 reviews.
Who Diffco Is Best For
Diffco is a strong fit for startups moving from proof-of-concept to production-ready products, particularly those integrating AI workflows or needing a full-stack team quickly. Mid-market companies looking to modernize existing infrastructure or embed AI into current platforms also align well with their model. On the staffing side, they suit technical teams that need vetted engineers for both short and long-term contracts without the overhead of traditional recruiting.
Why Choose Diffco
Things to Consider
Diffco Services
Selected Work

Good2Go β Core Platform Development & Product Growth
Good2Go
Diffco partnered with Good2Go on core platform development and ongoing product growth, keeping the platform robust and adaptable as offerings expanded.
View case study
FlashGrid β High-Availability Oracle Database Platform Site
FlashGrid
Diffco built digital product work for FlashGrid, whose software makes high Oracle database availability simple and robust for enterprises running mission-critical databases on commodity or cloud infrastructure.
View case study
WYA β Social iOS App from Concept to Launch
WYA
Diffco turned WYA's concept into a polished iOS social app from scratch on a tight timeline, combining clear communication with strong design and engineering.
View case studyReviews from Google
We worked with Diffco on the second version of CustomScape.ai, our AI-powered landscaping platform, and had an excellent experience from start to finish. Their team helped us refine our product vision, design the AI-driven user experience, and build a production-ready version of the application on a tight timeline and within budget. Diffcoβs engineers and product team demonstrated a deep understanding of AI and our business needs, moved quickly without sacrificing quality, and communicated clearly throughout the project. The result was a stable, scalable Version 2 that received very positive feedback from our users and gave us a strong foundation for future growth. We highly recommend Diffco to anyone looking for a reliable partner for AI product strategy and custom software development
We hired Diffco to build a complex, production AI agentic system and scalable backend for our client's fintech platform. They owned the architecture decisions, implemented the AI/ML layer and AI agents, and delivered reliable, production-ready work in a finance-grade environment with strong security and data-handling standards. The project was delivered on time and within budget. What stood out most was their deep AI/ML expertise combined with senior backend engineering β and the way the team operated like part of our own, taking ownership, communicating proactively through regular syncs and demos, and consistently delivering quality. Their speed let us move faster than we could have with internal resources alone. Highly recommend Diffco for AI and complex backend engineering. We'd happi
Reviews sourced from Google
See all 24 reviews on GooglePhotos






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