What the playground does with your model

No accounts, no server-side drafts

The playground (at studio.modeller.website) has no sign-in. Whatever you type stays in your browser's sessionStorage for that tab — it is never written to a database or file on our servers, and it disappears when you close the tab unless you share or download it yourself.

Analysis and diagnostics

Editing the model sends its current text to our hosted analysis API so it can be parsed, validated, and projected into diagrams. That service logs request metadata only — document and projection counts, outcome, elapsed time, and diagnostic codes — never the document text itself, and never an identity registry. Unhandled errors return a generic response with no source text, stack trace, or infrastructure detail.

Share links

A share link encodes your model directly into the link itself (after the #), compressed in your browser — it is never uploaded anywhere to create the link. That also means anyone you send the link to can read what's in it, the same as any other link or file you might share; treat it accordingly.

Downloaded workspaces

Downloading a workspace builds a zip file entirely in your browser and hands it to your browser's own download mechanism. Nothing about that file is retained by us afterward.

Analytics

We use Vercel Analytics and Speed Insights for anonymized traffic and performance metrics (page views, load times) — never model content, and never tied to an account, since there isn't one.

We also use PostHog for pseudonymous product events. These events show which site, page category, and feature was used, and whether an Initiative reached a phase. A random browser identifier lets us measure return use across Modeller sites. We do not record session replays, element text, model source, Initiative text, questions, responses, file paths, or full Initiative links. PostHog's configured plan controls event retention. Internal administrator activity is marked and excluded from headline engagement results.

Questions

Open an issue at github.com/Allann/Modeller.Next.