CadRays is also cool!
https://www.opencascade.com/products/cad-rays/

I've never heard of this render farm before, so far, I've been using https://rebusfarm.net for the longest time... which is why I was going to recommend it here, if you get the chance you should check it out too, they really have one of the best render farms I've seen, really fast and really affordable.

Can maybe useful! ;)
Not sure it is in the free Web version... (verified...it's not! :(

Not exactly a render but...
CGDream

https://cgdream.ai/
Free 20 images / Day, 1024 x 1024
252 Filters (5 maxi), 5 enhances / Day
import 3D GLB, FBX (so moi3D!!!

Filter Sc-fi : 1.00


Vizcom same prompt, (very complex colored transparent engine)
6 renders engines 100%, same start image (CGD), last 4 Refine, 90,50,3,10 %



But Vizcom can make the same : import a 3D object directly inside and render it!

Vizcom free + import volume 3D OBJ (from Moi3D) :)
A prompt + an image as style!

Thinking of getting light tracer.
I use blender but light tracer seems faster....when you are a one man show ...every minute counts :D