Pricing
The Toolkit’s apps are free. QC Analytical Results, and the other apps as they are released, cost nothing to use, including saving your projects to your account (up to 20 projects or 1 GB).
The QC Analytical Results API is paid for by plan. The API lets your own software send QC results to our analysis service and receive the same charts, control limits, flags and statistics as the app, as data (see the API guide). Each plan includes a number of chart calls a month; uploading data is free.
API plans
| Plan | Chart calls a month | Monthly | Yearly (2 months free) |
|---|---|---|---|
| Starter | 1,000 | US$35 | US$350 |
| Professional | 5,000 | US$120 | US$1,200 |
| Team | 25,000 | US$400 | US$4,000 |
The bill stays fixed: chart calls stop when the month’s allowance is used and start again on the 1st, so you never pay more than the plan price. Your Account page says so, with the box to change it.
Calls beyond your plan, if you turn the stop off: US$25 per 1,000 chart calls, rounded up to the next 1,000, billed after the month ends.
Either way, we email you when 80% and when all of the month’s chart calls are used.
How it works
- Choose a plan on your Account page in the Toolkit, monthly or yearly, once your account is approved (we check each new registration). API access starts as soon as the payment is confirmed, usually within a minute, and you make your keys on the same page.
- What is counted: each chart your software asks for is one chart call. Sending data, listing charts and checking your usage are free. Calls are counted per calendar month; your Account page shows the month so far, and we email you at 80% and 100% of your allowance.
- Taxes: prices exclude VAT and sales tax, which are added at checkout where they apply. A business with a VAT or GST number can enter it at checkout and is not charged VAT where the reverse charge applies.
- Renewal and cancelling: a plan renews automatically each month or year until you cancel it. Cancel at any time from the billing page linked on your Account page; the plan stays active until the end of the period you have paid for.
- Changing plan: email us and we will move you to the new plan straight away, adjusting the price for the rest of the period.
- Refunds: see our Refund Policy.
- Who sells it: our order process is conducted by our online reseller Paddle.com. Paddle.com is the Merchant of Record for all our orders. Paddle provides all customer service inquiries and handles returns.
Prices may change; we will tell plan holders by email at least 30 days before a change applies to them. These prices were last updated on 23 October 2026.
Questions: [email protected]