SigmaDesk
SigmaDesk: Free, browser-based SPC with broad charting, capability, Gage R&R and reporting tools. Ranked #5 of 15 in SPC Software by our editors (8.3/10); pricing: Free plan; best for individuals and small teams wanting free SPC.
At a glance
- Editor score8.3 / 10
- PricingFree plan
- Best forIndividuals and small teams wanting free SPC
- Free planYes
- Paid fromFree
- Process capability analysisYes
- Facts checked24 Sep 2026
Where it wins
- Covers variable and attribute control charts across common chart types
- Includes Cp, Cpk, Pp, Ppk and ANOVA-based Gage R&R analysis
- Offers violation detection, dashboards, sharing and PDF report export
Where it doesn't
- Measurement data must be entered or pasted manually
- Saving studies and collaboration require a signed-in account
- Web-only deployment may not suit offline or local-install workflows
Our verdict on SigmaDesk
SigmaDesk is browser-based statistical process control software for quality engineers and manufacturing teams. It supports manual entry or pasted measurement data, interactive chart recalculation, and study management through an account. The tool is aimed at solo users, small teams and mid-market groups that need core SPC and Six Sigma analysis without installing desktop software.
The published Free plan costs $0 USD per month and includes variable and attribute control charts, process capability analysis, and browser-based data entry and analysis. Its chart coverage includes I-MR, X̄-R, X̄-S, p, np, c and u charts. Capability work covers Cp, Cpk, Pp and Ppk, while ANOVA-based Gage R&R addresses measurement-system analysis. Run charts, hypothesis tests, Western Electric and specification-limit violation detection, and an integrated recalculating spreadsheet extend the analytical workflow. Fishbone diagrams include AI suggestions, and signed-in users can share dashboards and export PDF reports.
SigmaDesk’s main trade-off is its manual collection model: users enter or paste measurements rather than relying on an automated collection workflow. The browser-based deployment keeps access straightforward, but teams that require local software or offline operation may need another approach. Saving studies and collaborating also depend on signing in. Choose SigmaDesk when free, web-based SPC with a broad set of charts and quality analyses is the priority; consider alternatives built for automated data capture or local deployment when those requirements are central.
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SigmaDesk pricing
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SigmaDesk fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Process capability analysis | Yes |
| Gage R&R / MSA | Yes |
| Real-time monitoring | Yes |
| Rule-based alerts | Yes |
| API access | Not verified |
| Data collection mode | Manual |
| Deployment model | Cloud |
| Deployment | Cloud |
| Platforms | Web |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Pricing | Free plan (source) |
| Website | sigmadesk.app |
| Facts checked | 24 Sep 2026 |
Alternatives to SigmaDesk
- NEXSPCConfigurable SPC with real-time charts, mixed data collection and optional MSA analysis.8.9
- Zontec SynergySPCWindows-based SPC for real-time monitoring, analysis and flexible measurement capture.8.7
- QA/S SPCManufacturing SPC with gauge links, machine data collection and MES/ERP synchronization.8.6
See all SigmaDesk alternatives →
SigmaDesk vs the competition
- SigmaDesk vs NEXSPC
- SigmaDesk vs Zontec SynergySPC
- SigmaDesk vs QA/S SPC
- SigmaDesk vs Mitutoyo MeasurLink
- SigmaDesk vs SAS/QC
- SigmaDesk vs FAST SPC Software
Compare SigmaDesk with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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