An AI-native product development agency
Founded in 2019 in Vilnius, Lithuania. We combine AI-augmented workflows with senior engineering to ship products fast, at a fixed price, for clients worldwide.
Our story
We started Quassum because shipping software takes too long. Months of discovery, endless meetings, budgets that balloon. So we run things differently: every project starts with a working demo in under a week, priced as a fixed number tied to a concrete result, with AI augmenting our engineers at every step. Since 2019 we have shipped our own iOS apps, open source libraries, and SaaS products alongside client work. That habit of shipping is what you hire.
What we believe
Ship fast, iterate faster
Speed is a feature. Every engagement starts with a working demo in under a week.
AI as a multiplier
AI runs through every stage of our work, from code generation to testing to deployment. It lets a small team ship at the pace of a big one.
Outcomes over hours
Every project has a fixed price tied to a concrete deliverable. You pay for results.
Open source first
We maintain libraries used by thousands of developers. Open source is how we prove our craft.
Our expertise
We pick the right tools for each project, but these are the technologies we reach for most.
Web Development
Next.js, React, TypeScript, Tailwind CSS, Node.js
Mobile Development
React Native, Swift, SwiftUI, iOS, Android
AI & Machine Learning
OpenAI, Computer Vision, NLP, Custom ML Models
Infrastructure
Vercel, AWS, Google Cloud, Docker, CI/CD
By the numbers
2019
Founded
20+
Products shipped
40K+
Monthly npm downloads
Open source contributors
We maintain open source tools like Squircle.JS and SVG to SwiftUI, used by thousands of developers.
Ready to work with us?
Tell us about your project. We'll scope it and give you a fixed price within 48 hours.