A snapshot of who is building what, organized by qubit modality. Specs change quickly — always cross-check the vendor’s current docs.

Superconducting

• IBM Quantum — Heron / Condor families; free-tier cloud access via the IBM Quantum Platform.
• Google Quantum AI — Sycamore and successor chips (limited external access).
• Rigetti — Ankaa-series; available via QCS, AWS Braket, and Azure Quantum.
• IQM — On-premise and cloud-accessible superconducting systems.

Trapped ion

• IonQ — Forte / Tempo systems via AWS Braket, Azure Quantum, GCP.
• Quantinuum — H-series with mid-circuit measurement and qubit reuse; cloud access via own API and Azure.

Neutral atom

• QuEra — Aquila (analog Rydberg) on AWS Braket.
• Pasqal — Analog and digital neutral-atom processors.
• Atom Computing — Large-scale neutral-atom arrays.

Photonic

• Xanadu — Borealis and successors via Xanadu Cloud; PennyLane integration.
• PsiQuantum — Pursuing fault-tolerant photonic architecture.

Cloud aggregators

• AWS Braket, Azure Quantum, Google Cloud — multi-vendor access layers.

Stub — add personal benchmarks, queue times, and observed fidelities here.