Caladia is a business process simulator for the rest of us. Sketch your workflow as a block diagram and a Gantt chart materialises beneath it — complete with critical path, resource conflicts, and Monte Carlo risk analysis. Plans live as plain JSON files on your disk. No accounts, no backend, no server to subpoena.
Everything teams currently piece together from MS Project, Excel, and a whiteboard — in one focused tool.
Drag activities, decisions, and start/end nodes. FS, SS, FF, and SF dependencies with signed lag. Multi-select, copy/paste, full undo history.
Auto-updates on every edit. Critical path highlighted, non-working days shaded, dependency arrows, collapsible loop groups, dark mode.
Triangular, PERT-beta, or normal distributions per node. Seeded reproducible runs. P50/P80/P95, criticality index, tornado chart.
Diamond-shaped review nodes with a pass probability and a failure delay. Failed reviews extend the chain rather than branching it.
Wrap nodes into iterative loops with configurable kickout: max iterations, time budget, convergence, or external trigger. Iteration counts modeled in Monte Carlo.
Resource pools with custom calendars. Per-assignment conflict policy: intersection, resource-wins, or activity-wins. Utilization histogram included.
Create named what-if scenarios by overriding node durations. Compare deterministic CPM results side-by-side. See critical-path changes and working-day delta at a glance.
Wrap a group of nodes into a single visual block with one entry and exit. Drill in to edit, save out as a reusable .calasub file.
Bring an MS Project file, a Gantt spreadsheet, or a process slide deck. Caladia ships a portable LLM authoring skill — use any model you want, with no embedded API key.
From cold start to a working schedule in minutes.
Drag in nodes, draw arrows, name things. The canvas feels like a whiteboard — only it knows about durations and dependencies.
Click any block to set duration, distribution, resources, and lag. Each field has a sensible default — fill what matters.
The Gantt updates live. Run Monte Carlo to see risk percentiles. Compare what-if scenarios. Save to a .cala file when you’re done.
The project format is a documented Zod schema, validated on every load. No proprietary blobs, no “upgrade required” dialogs, no vendor that can disappear and take your plans with it.
Caladia is free, open-source, and runs in any modern browser. Nothing to install, nothing to configure.