Quantum‑Si announced plans to ship its Proteus protein sequencing platform in late 2026, positioning the instrument as a high‑throughput, single‑molecule protein analysis system that could reshape proteomics workflows. The company signaled a price range between $300,000 and $500,000 and emphasized the platform’s capacity to analyze millions of peptides per run with reagents detecting most amino acids. If delivered, Proteus could accelerate applications from biomarker discovery to antibody characterization, but adoption will hinge on throughput, reagent robustness and clear advantages over mass spectrometry in sensitivity and cost per data point.