KetQat Pro
Threshold studies, randomized benchmarking and quantum-volume certification as one command each: statistics with uncertainties, comparisons and a report. Runs on your own computer, like Free.
USD 15/ user / month
Pro checkout is not available yet. The price is a proposal and may change before sales open. Free products are available now.
Checkout is not open yet. Free products work now, without an account.
In the box today
Pro products are listed below with their full definitions, so you can read exactly what each one computes before paying anything.
How it is delivered
ketqat pro login stores a signed entitlement on your machine.ketqat pro install downloads a signed bundle; every file hash is checked before it is written.Pro products
Each page states what the open SDK already does and what the Pro workflow adds, word for word from the product definition.
Quantum Error Correction · Threshold studies
Distance x error-rate sweep with Stim + PyMatching: Wilson points, suppression factors, bootstrapped threshold crossing, report.
Quantum Information · Channel analysis
From Kraus operators: Choi matrix, CPTP check, Pauli transfer matrix, gate fidelities, unitarity and diamond distance in one report.
Quantum Information · Benchmarking
Quantum volume per Cross et al. 2019: finite-shot heavy outputs, the 2-sigma pass rule, per-width intervals, achieved QV and a report.
Quantum Information · Benchmarking
Standard, interleaved and simultaneous Clifford RB in one run: error per Clifford, gate error with Magesan bounds, bootstrap CIs, report.
The open SDK already samples and decodes a rotated surface-code memory at one distance and rate with a Wilson interval (the free surface-code-memory product), computes a suppression factor between two rates (qec_statistics.suppression_factor) and, for manifest sweeps, estimates a threshold as the median of pairwise curve crossings with the spread between pairs as its only uncertainty (threshold.py). Nothing of that moves behind Pro. Pro adds the study as one catalog run: the whole distance x rate sweep with the same open sampler, suppression factors with intervals at every rate, a neighbouring-pair crossing estimator in log-log space with a parametric bootstrap interval over per-point failure counts, a finite-size scaling collapse with its quality number, and a Markdown report.
The open SDK already converts between process-tomography representations (Pauli transfer matrix and Choi matrix, in process_tomography.py) and computes state measures such as fidelity and trace distance (the free quantum-state-measures product). Pro adds the integrated channel workflow: CPTP checks from Kraus operators, average gate and entanglement fidelity, unitarity, exact diamond distance for Pauli channels with bounds otherwise, and a single JSON/Markdown report.
The open SDK already builds quantum volume model circuits with Haar-random SU(4), computes their exact ideal and depolarized heavy-output probabilities and, at one width, applies a 2-sigma bound from the empirical spread across circuits (quantum_volume.py). Nothing of that moves behind Pro, and this product calls those functions. Pro adds the certification as one catalog run: finite-shot sampling of heavy outcomes per circuit, the protocol's binomial 2-sigma rule as published, empirical and bootstrap intervals beside it, several widths with the achieved quantum volume and a monotonicity flag, the circuit-count minimum check, and a Markdown report.
The open SDK already enumerates the 1- and 2-qubit Clifford groups, builds and samples standard, interleaved and simultaneous RB sequences with Stim, fits the decay by a weighted linearized least squares with a propagated standard error, computes the interleaved gate error with the Magesan systematic bound and the addressability error, and runs standard RB from a manifest (randomized_benchmarking.py, runner.py). Nothing of that moves behind Pro, and this product calls those functions. Pro adds the suite as one catalog run: all three protocols on one seed with every sequence's survival kept, a weighted nonlinear fit in survival space that also handles the noiseless case, bootstrap intervals over sequences for every reported quantity, a separate noise rate for the interleaved gate, cx as an interleaved gate, analytic expectations beside every estimate, and a Markdown report.
| Feature | Free | Pro |
|---|---|---|
| Free products | All 12: Grover search (statevector), QAOA for MaxCut (statevector), Quantum Fourier transform (statevector), Quantum phase estimation (statevector), Quantum teleportation (statevector), Trotterized Ising dynamics (statevector), VQE ground-state energy (statevector), Repetition code memory (bit-flip), Steane [[7,1,3]] code: fault-tolerance check, Surface-code memory experiment (Stim + PyMatching), Quantum state measures, Quantum state tomography | Included, unchanged |
| Pro products | Not included | 4: Surface-code threshold study (Stim + PyMatching), Quantum channel analysis, Quantum volume certification, Randomized benchmarking suite (Clifford RB) |
| Where it runs | Your computer | Your computer |
| Account | Not needed to run | Needed (subscription and entitlement) |
| Network at run time | None | None while a cached entitlement is valid (up to 7 days) |
| Telemetry | None. Usage reports are opt-in | None. Usage reports are opt-in |
| Open-source SDK, docs, profiles and contribution credit | Included | Included |
| License of what you receive | Apache-2.0 | KetQat Pro license for Pro bundles |
Stores a signed entitlement on your machine.
ketqat pro loginDownloads a signed bundle; every file hash is checked before it is written.
ketqat pro install [email protected]Starts offline while the entitlement is valid.
ketqat catalog run [email protected]Every Free product (they stay open source, free and usable without an account), plus the Pro products listed on this page, delivered as signed bundles that run on your own computer. Nothing that is open source today moves behind Pro.
No. Pro runs locally like Free. The only network calls are `ketqat pro login` (fetches a signed entitlement, valid up to 7 days) and `ketqat pro install` (downloads a bundle whose every file hash is checked). Usage reports are opt-in and show you the payload first.
Yes, while the cached entitlement is valid (up to 7 days). When it expires, the CLI tells you the expiry and the command to renew. A running job is never interrupted.
No new Pro runs start and no Pro updates download once the token expires. Your run records and results are kept and never locked. Free products are unaffected.
No, it is not DRM. Code delivered to your machine can be copied or modified; the entitlement gates official distribution and updates, nothing more.
The price shown is a proposal until sales open. One subscription per person, no usage metering, credits or overage, and KetQat never bills cloud or hardware costs: everything runs on your machine.
Before live sales
Live Pro sales need the owner's approval of the price, plus seller, legal and tax setup. Until then this page shows a proposed price and checkout is either unavailable or in Stripe test mode. Read the terms and privacy policy.