12+ Best Alternatives to IonQ in 2026
Trapped-ion quantum computing as a cloud service.
Looking for an alternative to IonQ? Below are 12 AI startups working in the same space — ranked by our Neuron score so the most credible options come first. Each card shows what makes the tool a viable substitute, pricing signals, and funding stage.
- 1View alternative →
PSI Quantum
$2.3BPhotonic quantum computing for fault-tolerant AI workloads.
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
- 2View alternative →
Quantinuum
$2.6BWorld's largest integrated quantum computing company
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
- 3View alternative →
Atom Computing
$101MNeutral-atom quantum computers with 1,000+ qubits
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
- 4View alternative →
Quantum Machines
$280MThe control layer powering the world's quantum computers
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
- 5View alternative →
NVision
$120MQuantum-enhanced MRI that images disease metabolism in real time
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
- 6View alternative →
Alice & Bob
$140MFault-tolerant quantum computing powered by self-correcting cat qubits.
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
- 7View alternative →
Quobly
$145MIndustrial silicon-based quantum computers built on semiconductor fabs.
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
- 8View alternative →
CyberRidge
$26MPhotonic encryption that hides data as optical noise, quantum-resistant by design
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
- 9View alternative →
Lightmatter
$850MPhotonic chips that move data with light for next-gen AI data centers
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
- 10View alternative →
QpiAI
$41.8MWhy it's similar: Shares categories with IonQ — AI + Quantum.
💵 Free
- 11View alternative →
Quandela
$54MWhy it's similar: Shares categories with IonQ — AI + Quantum.
💵 Free
- 12View alternative →
SandboxAQ
UndisclosedTransforming the world with AI and advanced computing, applying quantitative AI to solve complex challenges in various industries.
Why it's similar: Shares categories with IonQ — AI + Quantum.
💵 Enterprise · Contact sales
Frequently asked questions
What are the best alternatives to IonQ?
The top-ranked alternatives to IonQ on NeuronFeed are PSI Quantum, Quantinuum, Atom Computing, Quantum Machines, NVision. Rankings are based on our Neuron score, which weighs funding, momentum and editorial signal.
Is there a free alternative to IonQ?
Yes — QpiAI, Quandela offer a free plans. See the pricing column for each alternative above.
How is this list ranked?
We rank alternatives by shared categories with IonQ, then by our proprietary Neuron score (0–100) which combines funding, team quality, momentum, and editorial input. The list refreshes every 30 days.
IonQ vs PSI Quantum — which is better?
It depends on use case. PSI Quantum (Photonic quantum computing for fault-tolerant AI workloads.) is the #1-ranked alternative. See the full side-by-side at /compare/ionq-vs-psiquantum.
Explore more around IonQ
Contextual paths to related AI startups, deals and rankings.