Websites, apps, AI & infrastructure
For the way
you live, work,
and play.
We’re Externum, an independent digital development studio. We build websites, mobile apps, progressive web apps (PWAs), AI systems, and games—along with the backend infrastructure that powers them.
Explore our workThe Externum portfolio
Different ideas. The same care.
01 / Everyday & Work
Make room for the rest of your day.
Tools for planning your work, understanding your income, and looking after your vehicle.
02 / Personalization & Messaging
Make your phone feel like yours.
The Obsidian family brings a personal touch to your home screen, icons, and conversations.
Obsidian Launcher
A home screen with your own sense of order.
Explore Obsidian LauncherObsidian Messages
An intentional space for everyday conversations.
Explore Obsidian MessagesObsidian Icon Pack
A consistent visual language for your home screen.
Explore Obsidian Icon Pack03 / AI & Business
Turn information into useful work.
Assistant experiences and research tools being developed at Externum.
Caelion AI
An evolving AI platform for ideas, knowledge, and creation.
Explore Caelion AIExternum EBI
Business research with evidence behind it.
Explore Externum EBI04 / Games
Find your next world to explore.
Original worlds, survival adventures, and small games built around one good idea.
Wildveil Kingdoms
A magical frontier shaped by discovery and restoration.
Explore Wildveil KingdomsThe Sinking Vessel: Survival
Find a way out as the ship goes under.
Explore The Sinking Vessel: Survival05 / Websites & Communities
Bring people and ideas together.
Web platforms and app-like experiences built for communities that keep coming back.
Tiles Legacy
A community app for Tiles Survive players, with guides, events, and Tiles Legacy games.
Explore Tiles Legacy
Fan-Attic Collectibles
A website and PWA built by Externum for Fan-Attic Collectibles.
Explore Fan-Attic CollectiblesBuilt with a long view
One studio.
Many possibilities.
From the experience people see to the systems working behind it, we develop the whole product. Every website, app, AI system, and backend has its own purpose—and the same commitment to thoughtful, ongoing development.