Stripe Billing
Stripe Billing is the OpenCharts payment backbone — every subscription, credit pack, and invoice flows through Stripe with secure card handling and automated dunning.
In depth
OpenCharts uses Stripe Checkout, Stripe Portal, and Stripe Connect (for some integrations). Webhooks keep the OpenCharts subscriptions collection in sync with Stripe in real time.
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Free Plan
The Free plan is the no-cost OpenCharts tier — full access to flowcharts, whiteboards, notes, presentations, AI extraction, and Theo with a monthly AI credit allotment.
Starter Plan
Starter is the entry paid plan — bigger AI credit allotment, more storage, and higher export limits for individuals and small teams.
Unlimited Plan
Unlimited is the heavy-usage plan — the largest AI credit pool, full media engines, expanded storage, and access to advanced engines like Theo Reason and Consensus.
Teams Plan
Teams is the multi-seat plan — shared AI credit pool, centralized billing, organization-level storage, and team admin controls.
AI Credits
AI Credits are the unit OpenCharts uses to meter Theo usage — every chat reply, image, video, or autonomous skill run consumes a credit amount based on the engine and tools involved.