Classiq

Riverlane is the global leader in quantum error correction technology, developing Deltaflow — a real-time QEC stack with proprietary chips, decoders, and compilers that works across all qubit modalities. Deltaflow 2 was installed at Oak Ridge National Lab in 2025, the first dedicated real-time QEC integration at a U.S. national lab. In 2026, Riverlane demonstrated 16.32µs QEC latency — a fourfold improvement over Google's Willow benchmark. The company partners with over 60% of the world's quantum computer companies.

Q-CTRL develops AI-driven firmware that sits between quantum algorithms and control hardware, suppressing noise and optimizing gate performance. Its Boulder Opal product integrates with control stacks from Quantum Machines, Qblox, Zurich Instruments, Tabor, and Keysight — making it a modality-agnostic performance layer. Q-CTRL also offers the Black Opal educational platform and has expanded into quantum sensing for navigation and defense applications.

Phasecraft is a quantum algorithm R&D company founded by academics from UCL and the University of Bristol. In September 2025, Phasecraft raised $34M led by Plural and Novo Holdings with Playground Global. The company develops hardware-aware algorithms for materials simulation and structural optimization, with partners including Johnson Matthey and Oxford PV. Phasecraft works across superconducting and neutral-atom platforms, and partners with BT, Google, and IBM.

Multiverse Computing develops quantum and quantum-inspired software for financial services and enterprise AI, focusing on portfolio optimization, risk analysis, fraud detection, and LLM compression. Its CompactifAI platform applies quantum-inspired tensor networks to compress and accelerate large language models. Revenue exceeded €9M in 2024 — significant for a quantum software startup. In 2025, Multiverse raised a €189M Series B and opened offices in Madrid and Toronto. The company positions itself as a provider of "green AI" solutions that reduce the compute carbon footprint.