Can I still use the open-source library?

Yes, Mermaid.js is free and open-source regardless of the Chart subscription.

Do I keep my diagrams?

You keep read access but cannot create new ones on the free plan.

How to Cancel Mermaid Chart (2026)

Mermaid Chart plans start from $0.00/month. Follow our 4-step guide to cancel your subscription in about 3 minutes — with tips to avoid retention offers.

Updated: March 2026

from $0.00/month

(≈ ZAR 0.00)

Easy

Estimated Time:3 minutes

Cancel Method:Website

Log In

Settings

Go to Account then Billing

Cancel

Click Cancel Plan

Confirm

Confirm cancellation to revert to the free tier

Retention Tips

Mermaid Chart may offer an extended trial.

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