Quantum Market Cap

Alice & Bob

SuperconductingPRIVATE — NO IPO ANNOUNCED

Pre-IPO quantum computing company profile · Founded 2020 · Paris, France

Company Facts

Founded2020
HeadquartersParis, France
TechnologySuperconducting quantum computing
Employees~200
Total raised€230M+

IPO Status

No IPO announced

ExpectedNot announced

Alice & Bob shares are not available on public exchanges. See below for listed alternatives with similar technology.

What Alice & Bob Does

Alice & Bob is a Paris-based quantum computing company building superconducting "cat qubits" — a qubit design that exponentially suppresses bit-flip errors in hardware, dramatically reducing the number of physical qubits needed for error correction. Where surface-code approaches may need 1,000+ physical qubits per logical qubit, Alice & Bob targets fault tolerance with an order of magnitude fewer.

The company raised a €100M Series B in January 2025 (Future French Champions, AXA Venture Partners, Bpifrance) and a further €130M in April 2026, bringing total funding above €230M. It is one of five companies selected for France's €500M PROQCIMA defense-quantum program, targeting an industrially useful fault-tolerant quantum computer by 2030.

Technology: Superconducting cat qubits with hardware-level bit-flip protection; targeting ~100 logical qubits with far fewer physical qubits than surface-code architectures.
Roadmap: Fault-tolerant "useful" quantum computer by 2030 under its published cat-qubit roadmap and the PROQCIMA program.

Alice & Bob Funding History

RoundAmountDateKey InvestorsValuation
Growth round€130MApr 2026Existing + new investors—
Series B€100MJan 2025Future French Champions, AXA Venture Partners, Bpifrance—

Key Milestones

2023Cat-qubit chip "Boson" series demonstrates bit-flip lifetimes of minutes — orders of magnitude beyond standard transmons.
Mar 2024Selected for France's PROQCIMA program (with Pasqal, Quandela, Quobly, C12) — €500M toward sovereign fault-tolerant machines.
Jan 2025€100M Series B to build its first logical-qubit prototype.
Apr 2026€130M follow-on brings total raised above €230M.

How to Get Exposure Today

Rigetti (RGTI) is the listed superconducting gate-model comparable. No public pure-play uses cat qubits; sector exposure is available via the QTUM ETF.

Alice & Bob Stock FAQ

Can you buy Alice & Bob stock?

No. Alice & Bob is private and has not announced an IPO. The closest listed superconducting pure-play is Rigetti (RGTI).

What are cat qubits?

Cat qubits are superconducting qubits that encode information in "Schrödinger cat" states of a resonator, suppressing bit-flip errors exponentially in hardware. That cuts the error-correction overhead — Alice & Bob argues fault tolerance needs ~10× fewer physical qubits than surface-code designs.

How much has Alice & Bob raised?

Over €230M, including a €100M Series B (January 2025) and a €130M follow-on (April 2026), plus support from France's PROQCIMA program.

More pre-IPO quantum companies

PsiQuantumPhotonic · No IPO announcedPasqalNeutral Atom · SPAC merger announcedQuEra ComputingNeutral Atom · No IPO announcedIQM Quantum ComputersSuperconducting · SPAC merger announcedQuandelaPhotonic · No IPO announcedOxford Quantum Circuits (OQC)Superconducting · No IPO announcedplanqcNeutral Atom · No IPO announcedMultiverse ComputingQuantum Software · No IPO announcedTerra QuantumQuantum Software · IPO exploredOrigin QuantumSuperconducting · STAR Market IPO in preparationSpinQ TechnologySuperconducting · IPO targeted within 18 monthsAtom ComputingNeutral Atom · No IPO announcedSandboxAQQuantum Security · No IPO announcedQ-CTRLQuantum Software · No IPO announcedSEEQCSuperconducting · SPAC merger announcedQuantum BrillianceDiamond NV · No IPO announcedQuantum RoadmapMilestones & fault-tolerance timeline

Static profile, updated manually · Last updated 2026-07-01 · Sources: The Quantum Insider — Alice & Bob coverage ↗