Our goal is for all of our products to be RYF certified, and we try to pick hardware components that are free and if that’s not possible we work to free the remaining components. This is a policy that’s part of our Social Purpose Corporation Charter:
The Corporation will design and manufacture hardware that respects users’ rights to privacy, security, and freedom. The Corporation will use hardware and software that respects users’ rights. Non-free, or proprietary, chipsets that require installable firmware binaries into the kernel will be strictly prohibited within the Corporation. If a suitable component part that fully respects these rights is not available in the marketplace, the Corporation may use a part in its products that does not meet this standard if it is necessary for the product to be fit for purpose, in which case the Corporation will: (1) provide purchasers of the product, in writing, with strong evidence that a free version of the part with equivalent specifications is not available and that developing a free version of such would not be feasible at that point in time; and (2) actively pursue the development of a free version of the part for its future products.
To answer your specific question, the Librem Key is based on the Nitrokey Pro v2 hardware.