If you buy Supermicro motherboards, which come in regular form factors too, like for example X9SCM-F [0], or X11SSL-F [1], they come with IPMI (which is what the -F designates), which is exactly what iLO, DRAC, etc., is and in a normal form factor. You don't have to buy fancy jet-engine "server" boxes when you can get the same stuff in a mATX form factor. No license needed.
I have been using the X9SCM-F for the last 9 years, and enjoy being able to modify the BIOS remotely, boot remote ISO images, or troubleshoot any boot problems without physical presence.
[0] https://www.supermicro.com/products/motherboard/Xeon/C202_C2...
[1] https://www.supermicro.com/en/products/motherboard/X11SSL-F