ODM and OEM are related to manufacturing products and businesses. They are both acronyms for deeper ideas. ODM stands for original design manufacturer. OEM stands for original equipment manufacturing.
One of the key differences is the length of time it takes to develop the product. OEM is a much longer process, for it takes 1-8 months before the product is fully developed. ODM is a shorter amount of time. It takes only 1 to 4 weeks to develop the product. Another difference between them is the person that inspires the specifications for the product. OEM is based on the buyer, while ODM is based on the supplier.