Riverlane

Riverlane is a Cambridge, UK-based quantum computing company focused on quantum error correction (QEC), the set of techniques used to detect and correct the errors that accumulate in fragile qubits before quantum computers reach commercially useful scale. Its core product line is Deltaflow, a real-time QEC system that combines proprietary QEC chips with hardware and software components to identify and correct errors millions and, per the company, ultimately billions of times per second. Deltaflow is described as applicable to quantum computers using all major qubit types. The company also offers Deltakit, open-source software for developing and adopting quantum error correction.

The company positions itself as an ecosystem supplier rather than a quantum computer manufacturer, providing QEC hardware, software and services to quantum computing hardware companies, qubit control specialists, high-performance computing centres and national laboratories. It maintains a substantial research programme in QEC, decoding and quantum applications, with papers published in venues including Nature Communications, Nature Electronics, PRX Quantum and npj Quantum Information, and applied work with partners in pharmaceuticals, climate science, advanced materials and aerospace.

As of its about page, Riverlane employed over 180 people across offices in Cambridge (UK), Boston (US) and Delft (Netherlands), and stated it is backed by the University of Cambridge and technology venture capital firms.

Founding story

Steve Brierley founded Riverlane in 2016 from his kitchen table on River Lane, the Cambridge street that gave the company its name. Against the prevailing view that useful quantum computing was more than 20 years away, his research identified a quantum 'Moore's law' under which small-scale quantum computers were doubling in power every two years, implying useful scale within a decade. He founded the company with support from the University of Cambridge and guidance from ARM co-founder Jamie Urquhart, among others.

Business model

Riverlane supplies quantum error correction technology — QEC chips, hardware, software and service solutions — to third parties building or operating quantum computers, including hardware manufacturers, qubit control companies, HPC centres, national labs and government bodies, rather than selling quantum computers itself. It also distributes open-source QEC software (Deltakit) alongside its commercial Deltaflow system.

Sources describe QEC hardware, software and service solutions supplied to quantum computing manufacturers, HPC centres, national labs and government bodies; specific pricing or contract structures are not stated.

Traction

The company reports over 180 employees across three countries and partnerships with more than 60% of the world's leading quantum computer companies, including Rigetti Computing, Alice & Bob, QuEra Computing, Infleqtion and Atlantic Quantum, plus Oak Ridge National Laboratory and the UK National Quantum Computing Centre. It has raised a £3.25m seed round (2019) and a $75m Series C (2024), and has published QEC research in Nature Communications, Nature Electronics, PRX Quantum and npj Quantum Information.

Latest developments

In December 2025 Riverlane announced a European expansion with a new Delft hub led by Professor Barbara Terhal. In March 2026 it published a QEC Technology Roadmap setting out science and engineering milestones intended to accelerate the path to utility-scale quantum computing by three to five years, and reported running end-to-end quantum error correction on real hardware at Oak Ridge National Laboratory. In April 2026 it reported that its real-time QEC system achieved 10x lower latency than Google's reported results. In July 2026 it launched the Deltakit Community Fund with the Unitary Foundation to support open-source QEC.