Proprietary quantum clouds are "black boxes." When your simulation fails, is it your code, or a bug in the closed-source simulator? When you pay per shot on a real device, can you verify the result wasn't corrupted by a known bug?
With open source, the answer is always: Look at the source. free open source quantum services
The quantum future isn't just behind a paywall. It’s on GitHub. And it’s waiting for you to clone it. Proprietary quantum clouds are "black boxes