• $Microsoft(MSFT)$ is developing Azure Quantum -- a full-stack, open cloud ecosystem that integrates hardware partners like Quantinuum, $IONQ & $RGTI, while investing heavily in error correction to enable scalable quantum computing within Azure.• $Alphabet(GOOGL)$ operates Google Quantum AI, focused on building its own superconducting quantum processors (Sycamore) & pursuing quantum supremacy through deep vertical integration & a tight coupling with its AI research.• $IBM(IBM)$ leads with IBM Quantum -- offering access to real quantum computers via the IBM Cloud, with an ambitious roadmap to scale beyond 1,000 qubits by 2026 & a software stack bu