Sadly Katacoda got paywalled (totally get why they did it, these things have costs). I think some other similar platforms disappeared because they ran out of people willing to fund it. It’s a shame.

I’m hoping this offers an alternative. It has the risk of becoming out of date with reality, but at least even in that case the core should ~always be relevant.

katacoda got bought by o'reilly and went to shit from there. We tried to give them money in 2020 and they just sent us a templated email to "go self qualify with this form" and it was clear they only cared about enterprise sized customers. which is a real shame because it was a great platform.