Leading Software Development Company in the USA
Diffco is an AI-first software engineering partner for growth-oriented teams. We embed senior engineers and product strategists who turn product vision into AI-enabled, revenue-driving, scalable software — not just proofs of concept. With decades of experience across SaaS, web platforms, and mobile applications, and a deep understanding of global market trends, we combine sharp product thinking with high-standard engineering to build and evolve the software your business depends on.
Our team has extensive experience from building fast MVPs for Silicon Valley startups to developing complex products in healthcare, finance, and other regulated industries.
2025 Clutch
Top 20
App Developers
Top 10
Software Developers
Top app developers
in California
Top app developers
in California
Top Software Developers
California 2025
Top AI
Company 2024
Top Software
Development Company
Top Mobile
App Developers
Best Company To
Work With 2024
Top 50
AI Developers
Top Web
Development Companies
Top Mobile App
Developers in USA
Top 5 Mobile App
Developers in California
Top Custom Software
Company 2024
Top 5
AI developers
Our services
AI Engineering
We design and scale production-ready AI products for growth-oriented teams, utilizing leading models such as OpenAI, Anthropic, Gemini, Llama, Mistral, DeepSeek, Qwen, and more. We turn your data and roadmap into secure, measurable revenue and efficiency gains.
LLM
Tensorflow
NLP
Computer vision
...
Staff Augmentation
We provide senior engineers, AI/ML specialists, and dedicated teams that integrate seamlessly with your organization. They align with your goals and culture, operating as a true extension of your product and engineering teams.
Cultural fit
Top 1%
Instant hire
...
Front-end Development
We build modern, modular, high‑performance interfaces for web and mobile products. Our front-end teams deliver clean, responsive experiences that are tightly integrated with your back-end and AI features.
React
Angular
Electron
Vue.js
...
Back-end Development
We architect and implement robust, scalable back‑end platforms for SaaS, mobile apps, and enterprise systems. From high‑load APIs to data pipelines and AI infrastructure, we deliver secure, observable back-ends built for long‑term growth.
Node.js
Go
Python
PHP
...
Web Development
We design and build modern websites tailored to your product and operations, seamlessly integrating with your existing systems, data, and AI capabilities.
Sitecore
Contentful
Magento
...
Mobile Development
We develop high‑quality native and cross‑platform mobile apps for iOS and Android that integrate deeply with your back-end and AI features to deliver fast, reliable experiences at scale.
Swift
Flutter
Java
Kotlin
React Native
...
Our values
Clear communication
We build relationships based on integrity and trust, delivering on our promises and maintaining clear communication at all times.
Customer-Centric Approach
We prioritize our clients’ success, understand your unique needs, and deliver tailored solutions that drive your business growth.
Innovation and Excellence
As a team on the cutting edge of technology trends, we consistently deliver innovative, high-quality solutions.
Our clients were featured on
Our history
Processes
How we build
Discovery stage
We prioritize our clients' success, understanding your unique needs, and delivering tailored solutions that drive your business growth. The workflow roll-out is usually:
1
Get to know your project
2
R&D
3
PRD and wireframes development
4
Development plan and estimate
Development stage
We develop your product in iterative substages, allowing for regular testing, feedback, and adjustments to ensure alignment with your expectations.
1
Design
2
Mobile development
3
Web development
4
Back-end development
5
AI development
6
QA
Continuous development and support
Post-launch, we provide ongoing support, troubleshoot issues, and develop additional features to keep your product up-to-date and valuable.
1
Launch
2
Support
3
Ongoing development
Our executive team
Vadim
CEO
Vadim Peskov
CEO & Co-founder
Vadim is a co-founder of Diffco and an advisor at Alchemist Accelerator and various startups. As an expert in AI-enhanced applications, computer vision, cybersecurity, startups, and product design, Vadim is a frequent speaker at industry events.
Eugene
CTO
Eugene Nasonov
CTO & Co-founder
Eugene is a co-founder of Diffco and an expert in computer science, software development, software architecture, and server infrastructure. With more than 15 years of experience, he has worked closely with both global enterprises and startups.
Marko
PMO
Marko
PMO
Marko, a highly skilled senior project manager, has a strong track record delivering projects across Med-Tech, e-commerce, IoT, telecom, and machine learning. Tech-savvy and adaptable, he excels at driving results in complex, fast-paced environments.
Margo
Senior Recruiter
Margo
Senior Recruiter
With over 15 years of experience and a deep understanding of various technology domains, Margo has successfully recruited top talents in software development. Her industry knowledge and approach allow us to find the best talents to build a valuable product for our clients.
Thank you for your subscription.
We will be sending you some stories every month.
Our partners
Success stories of our clients
We provided full development
for a top meditation app.
We've delivered a powerful corporate website for the enterprise segment
The Diffco team studied FlashGrid’s product and marketing strategy to make sure all of our requirements were addressed.
We’ve developed an audio marketing platform with intelligent advertisements
We were impressed by Diffco’s approach to the development process and how they engineer new solutions.
We led the infrastructure migration to a new AWS-based architecture and assisted in product growth
We helped with developing comprehensive support solutions for internal processes and collaborative tools.
See more of our
amazing case studies.
Let’s build something
great together
We believe in turning ideas into reality and we're ready to join your journey. Reach out to us and let's start discussing your project.
Thank you for your request!
Please check your inbox in a few minutes for the follow-up email from our team.
