Company directory
Who is building what, across all seven hardware modalities and the software layer. Names and modality assignments are verified; quantitative claims stay out until checked against primary sources.
| Company | Modality | Status | Approach | |
|---|---|---|---|---|
|
PsiQuantum | photonic | private | The best-funded private quantum company; skipping NISQ entirely to build a million-qubit fault-tolerant photonic machine using semiconductor fabs. |
| X | Xanadu | photonic | private | Canadian photonic company behind the PennyLane software library and photonic sampling demonstrations. |
|
Quandela | photonic | private | French photonic company building single-photon sources and cloud-accessible photonic processors. |
| O | ORCA Computing | photonic | private | UK photonic company using fiber-based memory to make photonic processing practical at room temperature. |
Directory facts policy: this field's numbers change quarterly, and wrong numbers destroy credibility. Founding years, headquarters, funding and device specs render as "to verify" until checked against primary sources. Never a recommendation of any company.