We build software products
from idea to launch.
We design, build, and launch useful software products: mobile apps, web platforms, AI tools, SaaS products, and open-source developer tools.
Projects
Products we have built
A simple list of shipped products, experiments, SaaS apps, mobile apps, and open-source tools from Quassum.
StickerHunt.io
Active community
Join the IRL sticker hunt game and find stickers in your city.
Rythmic
10,000+ users
The perfect combination of a metronome and a tuner.
VSKS Keyboard
Featured in Lithuania
The best Lithuanian keyboard for your phone.
JustScribe
Available on Mac App Store
Local-first live transcription app. Instant, private, and works offline.
WidgetAI
Build any iPhone widget, just by asking.
Phosa
Native macOS photo editing, built for your Photos library.
Pluck
Copy any component from any website.
FutureBase.io
500+ businesses
Simple and affordable AI customer support.
SpecSource.ai
AI agent that writes bug specifications from your dev stack.
CompetiTaurus
100+ customers
AI competitive analysis and monitoring.
Squircle.JS
A squircle element for your favourite frontend framework!
SVG to SwiftUI Converter
Convert SVG paths to SwiftUI Shape code.
SwiftUI Generator for Figma
Easily convert any Figma Vector shape to SwiftUI code.
Services
Product development, end to end
We usually work across the full product loop: shaping the idea, designing the interface, building the software, launching it, and improving it after real users touch it.
Web products
Web apps, landing pages, dashboards, and full-stack platforms.
Mobile apps
Native-quality iOS, Android, and macOS apps from idea to store release.
AI features
AI workflows, agents, automation, and product features that are useful in practice.
SaaS builds
SaaS products, internal tools, billing, auth, analytics, and integrations.
How it works
Small process, real product
We keep the process compact so most of the energy goes into making the product better.
Share your vision
Tell us what you're trying to achieve. Not a 40-page spec — a conversation. We'll scope it and give you a fixed price within 48 hours.
See it working
Within a week, you'll have a working demo in your hands. Not a mockup. Not a slide deck. A real, clickable product you can show your team.
Ship and scale
We refine, polish, and ship to your users. You pay for the result we agreed on — not for the hours it took us to get there.
Open source
Developer tools we maintain
We maintain tools used by thousands of developers. Open source is how we prove our craft.
Build a product with us
Tell us what you want to make. We will help shape it, build it, and get it in front of users.
Most projects start delivering within 5 business days.
