While not a hardware service, OpenFermion is an open-source library critical for the "service" of quantum chemistry. It allows users to compile and simulate fermionic systems (like molecules) to run on quantum hardware. It is maintained by Google Quantum AI and collaborators.
With open source, the answer is always: Look at the source. free open source quantum services
The Rise of Free Open Source Quantum Services: A Guide to the 2026 Ecosystem While not a hardware service, OpenFermion is an