IonQ vs PSI Quantum
Which + Quantum AI tool is better in 2026?
IonQ
Trapped-ion quantum computing as a cloud service.
PSI Quantum
Photonic quantum computing for fault-tolerant AI workloads.
Side-by-side
PSI Quantum is the more established option (raised $2.3B); pricing is comparable on both sides.
| Metric | IonQ | PSI Quantum |
|---|---|---|
| Taglinei | Trapped-ion quantum computing as a cloud service. | Photonic quantum computing for fault-tolerant AI workloads. |
| Foundedi | 2015🏆 | 2016 |
| HQi | US | Palo Alto, US |
| Employeesi | 201-500 | 201-500 |
| Neuron scorei | 64 | 88🏆 |
| Total fundingi | Undisclosed | $2.3B🏆 |
| Latest roundi | ipo | Series E · Sep 2025 |
| Valuationi | — | $7B🏆 |
| Cheapest paid plani | — | Pricing not disclosed |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Enterprise · Contact sales | Pricing not disclosed |
| Pricing summaryi | 1 published plans | Enterprise · Contact sales |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for IonQ and PSI Quantum.
| Capability | IonQ | PSI Quantum |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | 1 (Python) | 1 (CUDA-Q) |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of IonQ
- More mature (2015)
🔵 Strengths of PSI Quantum
- Has raised more capital ($2.3B vs Undisclosed)
- Higher Neuron score (88 vs 64)
- Newer company (2016)
Which should you choose?
Choose PSI Quantum if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both AI + Quantum tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose PSI Quantum if you want the most established option — it has raised $2.3B, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
IonQ vs PSI Quantum — which is better?
It depends on your priority. IonQ is the leaner option; PSI Quantum has broader feature depth. See the side-by-side table above.
Is IonQ cheaper than PSI Quantum?
No — PSI Quantum's cheapest paid plan is Enterprise · Contact sales, while IonQ's is Usage.
Do IonQ and PSI Quantum offer free plans?
IonQ: Paid only. PSI Quantum: Paid only.
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