IBM
IBM Quantum is IBM's full-stack quantum computing platform, offering access to a fleet of 100+ qubit quantum computers alongside Qiskit — the world's most widely used open-source quantum software stack — for building and executing quantum algorithms and applications. The site showcases IBM's roadmap toward fault-tolerant quantum computing by decade's end, its IBM Quantum Network of 300+ academic, industry, and startup partners, and offers free platform access (10 minutes/month of execution time) alongside research, documentation, and case studies spanning finance, healthcare, and scientific discovery.
PsiQuantum
PsiQuantum is a quantum computing company on a mission to build the world's first commercially useful, fault-tolerant quantum computer, using a silicon photonics platform (its "Omega" chipset, manufactured at GlobalFoundries) that leverages existing semiconductor infrastructure to scale toward utility-scale systems. The company is building its first full-scale facilities in Moreton Bay, Australia and Chicago, Illinois in partnership with government partners, and recently signed a $125 million expanded agreement with DARPA under its Quantum Benchmarking Initiative. The site also showcases PsiQuantum's software platform (Construct) for developing fault-tolerant quantum algorithms and its target applications across energy, materials, pharmaceuticals, and finance.
Nvidia
This NVIDIA site positions the company not as a quantum hardware (QPU) builder, but as the classical supercomputing layer that quantum computing depends on — offering a software stack (CUDA-Q, CUDA-QX, cuQuantum), the NVQLink interconnect for integrating any QPU type with AI supercomputers, and AI models (NVIDIA Ising) that accelerate quantum calibration and error correction. It also showcases NVIDIA's Boston-based Accelerated Quantum Computing Research Center (NVAQC), partnerships with national labs and universities, and tools like cuPQC for post-quantum cryptography — all framed around the vision of "accelerated quantum supercomputing," where QPUs and GPUs work together as hybrid systems rather than quantum computers replacing classical ones.