As of August 2026, Alice & Bob is private, has no public stock ticker, and has not announced an IPO. It has raised €130M, including a €100M Series B that Nvidia's NVentures extended in May 2026.
Pre-IPO quantum computing company profile · Founded 2020 · Paris, France
Company Facts
IPO Status
No IPO announced
Alice & Bob shares are not available on public exchanges. See below for listed alternatives with similar technology.
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 has raised €130M total, anchored by a €100M Series B in January 2025 (Future French Champions, AXA Venture Partners, Bpifrance) that was later expanded with an investment from Nvidia's NVentures in May 2026. 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.
| Round | Amount | Date | Key Investors | Valuation |
|---|---|---|---|---|
| Series B | €100M | Jan 2025 | Future French Champions, AXA Venture Partners, Bpifrance | — |
| Series B extension | undisclosed | May 2026 | NVentures (Nvidia) | — |
Rigetti (RGTI) is the listed superconducting gate-model comparable. No public pure-play uses cat qubits; sector exposure is available via the QTUM ETF.
Related company roadmaps: Official Rigetti quantum roadmap · Official IonQ quantum roadmap
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?
€130M total, anchored by a €100M Series B (January 2025) later expanded with an investment from Nvidia's NVentures (May 2026), plus support from France's PROQCIMA program.
More pre-IPO quantum companies
Static profile, updated manually · Last updated 2026-08-15 · Sources: Alice & Bob €100M Series B announcement ↗ · The Quantum Insider — Alice & Bob coverage ↗