What are the recommended minimum requirements for hosting Umbraco (13+) on-prem? I can only seem to find that the minimum recommended Azure tier is S2 but nothing about on prem. What would the equivalent for a server be?

I'm hosting on a Raspberry Pi and that works great. So... as usual.. it depends on your use case - basically any server that can run the latest .NET version will do, for SQL, anything that can run SQL server will do. Depending on the size and activity of your site, you will need progressively more beefy hardward, but the absolute minimum is literally: servers that can run .NET and servers that can run SQL server.

Thank you for your reply, I figured as much 🙂 This page is not that complicated, however I think it does have its spikes now and then in activity. The best way forward would probably be to start off and see if the hardware is too beefy, or not beefy enough.

I could imagine running it with absolutely no problems on a 5-10 year old server with 8+ gigs of memory (maybe a bit more if SQL server is on the same machine). As long as your frontend doesn't do any database work or connects to many external/slow services then I'd think you'd be pretty comfortable. If there is a lot of editors working on it at the same time it might slow down from time to time, but it shouldn't be too bad.

We run working Umbracos on Azure B1 plans which means 1 vCPU 1.75GB RAM. I don't think you'd find an on-premise scenario (besides the RPI) that low-end. The highest Umbraco-only Azure tiers we use are S1 which is the same vCPU/RAM as B1 (but other improvements). That said, I can see why the minimum-recommended is 2 vCPU 3.5 GB RAM since 1 vCPU and 1.75 GB RAM is pretty ridiculous by today's standards.