Own the stack
We build the model, the training pipeline and the product.
It is slower, and it is the only way to stand behind what we ship. When Atom gets something wrong we can trace it back to data, training or serving and fix it, rather than filing a ticket with a vendor.
It also keeps our incentives straight. We are not reselling someone else's capacity, so we have no reason to push you towards the most expensive path through the product.