Quantum Logical-Qubit Leaderboard

This quantum logical qubit leaderboard tracks the verified, publicly demonstrated logical-qubit counts across every major quantum-hardware platform. A logical qubit is a single fault-tolerant qubit assembled from many physical qubits using quantum error correction; logical-qubit count, not physical-qubit count, is the metric that governs whether a quantum computer can run useful algorithms at scale. The 2026 this leaderboard is led by QuEra Computing with 96 verified logical qubits, followed by Quantinuum at 48 and Atom Computing plus Microsoft at 24. Want the hardware behind the rankings? Read the modality-by-modality guide to the 20 top quantum hardware companies that operate the systems on this ranking. The state of the leaderboard at a glance. Sources: peer-reviewed publications, official company announcements, and the entangledfuture.com Quantum Navigator. Encoding ratio is physical qubits per logical qubit, lower is better. Methodology note: results are limited to verified demonstrations published in peer-reviewed journals or pre-registered open documentation, not roadmap targets. The leaderboard updates each quarter as new results are announced. Neutral-atom platforms hold positions 1, 3, and 5 on the leaderboard. QuEra reaches 96 logical qubits using high-rate [[16,6,4]] codes at a 4.7-to-1 ratio. Atom Computing and Microsoft jointly demonstrated 24 logical qubits in November 2024 using…