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JMP
BlackLine
GraphPad Prism
IBM SPSS Statistics
LineScouts
Loopline Systems
For quality engineers, Six Sigma Green and Black Belts and students. Paste measurements or scan a check sheet; get control limits, rule violations and Cpk with a plain-English verdict. Free plan, Pro $29 one-time.

Learn Frontend Codegres | Custom Website, Apps

Website, pricing, platforms and company facts side by side.
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| Website | limitline.org | codegres.org |
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| Company | Startup from the United States · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


What LimitLine does LimitLine is statistical process control (SPC) software that runs in the browser. Paste measurements from Excel or scan a check sheet, and it builds the control chart, flags special-cause signals and calculates process capability, with a plain-English verdict and next step for...
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What each product offers, as listed by its team.


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An editorial look at what each product does well and who it suits.


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As answered by people managing LimitLine and Codegres.org.
LimitLine's answer
JavaScript running fully in the browser, Cloudflare Pages and Pages Functions for hosting, Stripe for payments, Ed25519-signed license keys verified with Web Crypto, PDF.js and Tesseract.js for reading documents and images on the device, and Resend for email.
LimitLine's answer
LimitLine was built by Nicholas Williford, a Lean Six Sigma Black Belt, after repeatedly seeing people stuck without access to statistical software when they needed a quick control chart or Cpk. The product was designed from 109 real complaints about existing SPC tools, the biggest being price and licensing, knowing which chart to use, and getting data in. It launched in October 2026.
LimitLine's answer
It runs entirely in the browser with nothing to install, and the data never leaves the user's device. Every result ends with a plain-English verdict and a next step, not just numbers. Its calculations are checked against the NIST/SEMATECH handbook's worked examples on every release, with the results published at limitline.org/validation. Pro is a one-time $29 license instead of an annual subscription.
LimitLine's answer
Desktop SPC packages typically cost hundreds of dollars or more per user each year, need an install that IT has to approve, and assume the user already knows which chart to pick. LimitLine has a free plan with no sign-up, a one-time Pro license, works on any computer including Chromebooks and locked-down PCs, and guides the user to the right chart. It covers the everyday SPC and Six Sigma toolkit; it is not a full statistics package for advanced modeling.
LimitLine's answer
Quality engineers and supervisors at small and mid-size manufacturing plants, especially where one Minitab license is shared or there is none; Lean Six Sigma Green and Black Belt candidates working on projects or exam prep; and trainers who teach SPC on classroom or training-room computers.
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