Yes! The Basic plan gives you access to core features so you can start creating diagrams right away. It’s a great way to explore Mermaid before upgrading.

Plus unlocks unlimited diagrams, limitless diagram size, and 300 AI credits. Premium includes everything in Plus, along with 2,000 AI credits, unlimited viewer seats, and 500 shared workflow runs per month.

Yes – you can start a free trial of Plus or Premium to try advanced features before committing.

Absolutely. You can upgrade, downgrade, or cancel your plan whenever you want. Changes are reflected in your next billing cycle.

We currently offer annual billing only. Monthly plans are not available at this time.

We accept all major credit cards. For Enterprise, we also support invoicing and purchase orders.

Enterprise includes everything in Premium, plus SSO, dedicated account support, custom contract and invoicing, and easy user consolidation. It’s designed for large teams with compliance needs.

Enterprise plans are customized based on your team’s needs. Contact our sales team to get started.

No. The core Mermaid syntax is always free and open-source. Paid plans add AI features, diagram storage, real-time collaboration, integrations, and security controls.

No. AI features are included in all plans, from capped credits to unlimited use. AI prompts from our paid users are never used for training and all data remains private.

A run is one execution of a workflow in Mermaid Flow, start to finish, however it’s triggered. Every plan includes runs: 15 per user each month on Basic and Plus, 500 shared across your organization on Premium, and custom on Enterprise. Runs reset monthly and are separate from AI credits. Workflows don’t count toward your diagram limit.