Plans and limits
Arcanum Engine Starter, Growth, and Ops tiers — automation slots and template access.
| Plan | Price | Concurrent active automations | Playbook access |
|---|---|---|---|
| Starter | 7-day free trial, then $29/month | Up to 3 | Fourteen email variants (Resend) + command center |
| Growth | $79/month | Up to 10 | Full catalog (37 playbooks/templates) + systems and packs + Slack/Discord/Teams + optional Klaviyo |
| Ops | $149/month | Unlimited | Same library as Growth; run replay API; no slot cap |
Library vs slots: The catalog ships 37 playbooks/templates. Starter exposes fourteen email variants with three concurrent slots. Each active install uses one slot; commerce systems install multiple playbooks at once. The install wizard warns on the Review step when you are on your last slot. Resuming a paused system or re-enabling a playbook enforces the same slot cap.
If your Shopify subscription lapses, Engine pauses all automations and skips webhooks until billing is active again. Tier changes sync via Shopify app subscription webhooks — renew in Settings → Billing to resume.
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