The explanation, not the number
Sigma governs the metric. Cerium governs the reasoning behind it — decomposition computed the same way every time, with the working shown.
Compare
Cerium vs Sigma.
Sigma is a strong cloud BI platform with a spreadsheet interface people genuinely like. Cerium is not a BI platform. If you want faster, governed reporting on your warehouse, Sigma is a good answer. If the reporting already works and the answers still take a week, that is the problem we built for.
At a glance.
| Attribute | Sigma | Cerium |
|---|---|---|
| Category | Cloud BI and analytics | Decision platform, downstream or upstream of BI |
| Where AI sits | Assistant layer over dashboards | Reasoning over your governed model |
| Deployment | Cloud only | SaaS or full on-premise |
| Data layer | Reads your warehouse | Reconciles sources into a governed model |
| Migration path | Rebuild in Sigma | Existing configuration migrates |
| Pricing model | Published tiers | Platform and estate, quoted |
| Write-back to operations | Input tables and Sigma Tables write back to your warehouse | Read-and-write API to ERP, CRM and WMS |
| Best fit | Teams who want spreadsheet-style analysis on live cloud data | Firms whose reporting works but whose answers still take days |
Accurate as of August 2026. Reviewed quarterly.
Where Cerium is stronger.
The data underneath
Sigma reads what your warehouse contains. Cerium reconciles what arrives, flags contradictions, and traces every figure to its source row.
On-premise and migration
Full on-premise deployment, and your existing configuration migrates rather than being rebuilt.
Write-back to operational systems
Sigma's input tables write back to your warehouse, which is genuinely useful and further than most BI goes. It stops there. Cerium's read-and-write API pushes the result into the ERP, CRM or WMS where someone acts on it — closing the loop between the analysis and the action.
Conversational AI on your own model
Ask a plain-English question and get an answer derived from your governed model, your definitions and your data — not a generic language model reasoning over a dashboard.
Visualisations that build themselves
Sigma requires someone to build the spreadsheet-style view first. Vibe Studio generates the visualisation from a plain-English description of what you want to see, grounded in your governed model.
Run both on the same question.
Bring a question your current stack takes days to answer. That is the fairest test there is.