Preview guided Aspire and microservice labs where you will edit working .NET projects, run them in disposable workspaces from your browser, and clear executable checks. No local SDK or Docker setup will be required when the beta opens.
The Labs catalog preview is public. Live workspaces remain in private beta. While we finish the production host, practice in the playground .
Inside the workspace
Every lab combines a project tree, full editor, live consoles, guided lessons, and executable checks in one disposable workspace.
The catalog
A course gives you the progression. Each lab gives you a focused engineering problem and a fresh workspace. Lessons guide the work, and checks prove the result.
Aspire
9 labs · 51 lessonsNine focused labs take you from your first AppHost through application modeling, discovery, configuration, service defaults, testing, deployment, and container resources. Build and verify each project before you continue.
Coming soonAspire is a Microsoft technology; this is an independent Katabench course.
Microservices
8 labs · 56 lessonsEight focused labs use executable production-pattern scenarios to practice modular boundaries, contract-tested APIs, safe retries, concurrency control, outbox and inbox delivery, edge authorization, observability, and production operations. Each lab isolates one problem so you can see the failure mode and prove the fix.
Coming soonThe boundary and reliability workspaces open when the production beta launches.
How Katabench Labs works
Choose a course, open one of its focused labs, and work through the lessons in a disposable workspace. Each lesson ends with a check that proves you got there.
Choose a course, then open a lab built around one engineering problem. Each lesson gives you working code, a clear goal, and room to make the change yourself.
Your code compiles and runs inside a disposable workspace created for the lab session. Watch the console, inspect real output, and call the application when the lab exposes an endpoint.
Each lesson ends with an automated check that proves the required behavior. Clear it to unlock the next lesson. Sign in to save course progress across workspaces and devices.
Your code runs server-side in a hardened sandbox isolated from Katabench internal networks. Resources are capped, the host sees an unprivileged workload, and the environment is destroyed after your session. See exactly what happens →
Reading docs and watching videos tells you how something works. A Katabench Lab makes you build it, run it, and prove the behavior yourself.
You learn by doing the thing, not by watching someone else do it. Every lesson puts working code in front of you and asks you to make it do something real.
The environment is yours for the session and thrown away after. Experiment freely, run it, break it, fix it, with nothing to clean up on your own machine.
Guidance walks you through each lesson, and the automated check tells you the moment it actually works. No guessing whether you got it right.
A hardened lab sandbox runs your code server-side, never on your machine. It cannot reach Katabench internal networks; outbound access is denied or tightly filtered for the lab profile.
The editor will run in your browser while your code builds and runs server-side in a disposable, isolated workspace. The catalog preview is public now; live workspaces remain in private beta.
Launch timing, access, and pricing will be announced when the production lab host is ready.
Preview the Aspire and Microservices courses, then practice in the playground while the production lab host finishes validation.
Explore the playgroundA short note when fresh kata land, plus the C# and performance tricks behind the grading. No spam, unsubscribe anytime.