Privacy Policy

We collect information needed to provide and improve MarkdownBrain.

We use personal data to:

• Create and manage your account
• Store and display your vault content
• Provide graph navigation, search, import, and export features
• Provide note editing, graph updates, and vault management
• Maintain security and prevent abuse
• Respond to support requests
• Process subscriptions and payments
• Improve reliability, performance, and product features
• Comply with legal obligations

MarkdownBrain offers AI-assisted features alongside direct editing, graph navigation, import, and export.

When you request an AI-assisted feature, we may process the text and limited related note information needed to provide that feature.

AI-assisted features may process content to:

• Create embeddings used to find related notes
• Classify note content
• Suggest structure or links
• Generate note drafts
• Support other user-requested editing workflows

MarkdownBrain uses the OpenAI API as its LLM service provider.

MarkdownBrain uses OpenAI for AI features without using your content to train AI models.

We send only the content needed to provide the AI feature you request.

Do not submit highly sensitive personal, financial, medical, legal, or confidential business information unless you are comfortable with it being processed through MarkdownBrain and OpenAI.

You can create and edit Markdown notes manually without using AI features.

Relevant note content may be sent to OpenAI to help:

• Classify and structure note content
• Suggest note drafts
• Suggest updates to related notes
• Suggest links between notes

Paid subscriptions for MarkdownBrain are processed by Lemon Squeezy.

Lemon Squeezy acts as the merchant of record for purchases made through its checkout. This means Lemon Squeezy handles payment processing, billing, applicable sales taxes or VAT, fraud-related payment checks, and transaction records.

MarkdownBrain does not directly store your full payment-card details.

Your payment information is processed according to Lemon Squeezy's privacy policy and buyer terms.

You can manage, update, or cancel your subscription through the billing portal provided by Lemon Squeezy.

For billing questions, contact us through the Contact page.

When you purchase a paid plan, Lemon Squeezy may collect information such as:

• Name
• Email address
• Billing country or address
• Payment method details
• Transaction and subscription information
• Fraud-prevention information

We do not sell your personal data.

We share personal data with external service providers only when needed to provide the Service.

These providers may only process data as necessary to provide their services to us, subject to applicable agreements and legal requirements.

We may also disclose information where required by law, to protect users or the Service, or in connection with a business transfer such as a merger, acquisition, or sale of assets.

We may share information with the following external service providers:

• OpenAI, to provide the AI-assisted features you request
• Lemon Squeezy, to process subscriptions and payments
• Google, to provide Google OAuth sign-in
• Cloudflare, to provide bot protection for the contact form

We keep personal data only as long as needed for the purposes described in this Privacy Policy.

In general:

• Account information is kept while your account remains active.
• Markdown content is kept until you delete it.
• Billing records may be retained where required for tax, accounting, fraud prevention, or legal obligations.
• Technical logs are retained for a limited period needed for security, troubleshooting, and service operations.

We use reasonable technical and organizational measures to protect your information.

No online service can guarantee absolute security. You are responsible for keeping your account credentials secure and using a strong password where applicable.

These measures may include:

• Encryption in transit
• Access controls
• Authentication protections
• Secure hosting providers
• Monitoring for abuse and security incidents
• Limited access to production systems

To make a request, contact us through the Contact page or at [email protected].

We may need to verify your identity before responding.

Depending on where you live, you may have rights to:

• Access your personal data
• Correct inaccurate data
• Request deletion of personal data
• Export your data
• Restrict or object to certain processing
• Withdraw consent where processing is based on consent
• Complain to a relevant data-protection authority

MarkdownBrain and its service providers may process information in countries outside the country where you live.

Where required by law, we use appropriate safeguards for international transfers of personal data.

You can manage cookies through your browser settings. Some features may not work correctly if essential cookies are disabled.

MarkdownBrain may use Umami, a privacy-focused analytics service, to measure page views and a small set of product events such as login, billing, vault open, export, and note-management activity.

Our Umami setup is intended to work without analytics cookies and without sending note content, prompt text, vault names, email addresses, or other user-generated content as analytics event data.

If we later use non-essential analytics or marketing cookies beyond this setup, we will provide any notices or consent options required by applicable law.

MarkdownBrain may use cookies or similar technologies to:

• Keep you signed in
• Remember preferences
• Maintain security
• Understand basic product usage
• Measure performance

MarkdownBrain is not intended for children under 18.

Do not use the Service if you are under 18 unless you have permission from a parent or legal guardian.

We may update this Privacy Policy from time to time.

When we make material changes, we may notify you through the Service, by email, or by updating the "Last updated" date above.