Privacy Policy

Last Updated: 16th January 2026

Silicon Witchery AB ("we," "us," or "our") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you visit our website (www.siliconwitchery.com) and use our Superstack IoT platform.

Information We Collect

Website & docs pages (www.siliconwitchery.com & docs.siliconwitchery.com)

Analytics Data
We use Umami.is, a privacy-focused analytics service, to monitor visitor count and demographics. This helps us understand how our website is being used without compromising your privacy.

Contact Form Submissions
When you submit our contact form, the information you provide (name, email address, and message content) is sent directly to our internal email system. This information is stored securely in accordance with GDPR best practices and is used solely to respond to your inquiry.

Email Newsletter
If you choose to subscribe to our newsletter, your email address is safely stored within Mailchimp, an industry-standard marketing tool. You can easily unsubscribe at any time by re-entering your email into the collection box, which will take you to a page where you can manage your subscription preferences.

Public Interactions
If you choose to interact with us over social media, these interactions are public. We regularly moderate our feed and content to ensure it does not infringe on any personal data. If you publish bugs or issues on our GitHub repositories, these are also public.

Direct Email Communication
If you choose to interact with us directly via email, those records are kept for future reference and legal purposes. These emails are encrypted, and we limit access to only those who need to see them.

Superstack IoT Platform (super.siliconwitchery.com)

Account Information
When you create a Superstack account, you can log in using GitHub, Microsoft, or Google OAuth. We only store your email address from these authentication providers. We do not store or have access to your social login passwords.

Payment Information
Payment processing is handled by Stripe, a PCI-compliant payment processor. We do not store any sensitive payment information such as credit card numbers. Stripe may collect and store payment details in accordance with their own privacy policy.

Device and Usage Data
When you use the Superstack platform, we collect:
• Device IDs (IMEIs) you register
• Sensor data and logs from your IoT devices
• Code and configurations you create
• API usage metrics
This data is necessary for the platform to function and provide you with our services.

How We Use Your Information

We use the information we collect to:
• Respond to your inquiries via the contact form
• Provide and maintain the Superstack platform services
• Process your payments through Stripe
• Send you newsletter updates (only if you've subscribed)
• Improve our website and platform
• Comply with legal obligations

Data Storage and Security

Website Data
• Analytics data is processed by Umami.is
• Contact form submissions are stored on our secure email servers
• Newsletter subscriptions are stored by Mailchimp

Superstack Platform Data
• All platform data is securely stored in our cloud database
• Data is encrypted in transit using DTLS 1.2 and TLS
• Access is restricted to authorized accounts and API keys only
• Enterprise users can optionally forward data to their own private cloud infrastructure

We do not store sensitive user information beyond what is necessary to provide our services.

Data Retention

Website Data
• Contact form submissions: Retained as long as necessary to address your inquiry
• Newsletter subscriptions: Until you unsubscribe

Superstack Platform Data
• Free tier: 30 days retention for data and logs
• Pro tier: 6 months retention
• Enterprise tier: 2 years retention
• Account information: Retained while your account is active

Your Rights Under GDPR

If you are a resident of the European Economic Area (EEA), you have certain data protection rights, including the right to:
• Access your personal data
• Correct inaccurate personal data
• Request deletion of your personal data
• Object to processing of your personal data
• Request restriction of processing your personal data
• Request transfer of your personal data
• Withdraw consent at any time

To exercise any of these rights, please contact us at info@siliconwitchery.com

Third-Party Services

We use the following third-party services that may collect information:
• Umami.is - Privacy-focused website analytics
• Mailchimp - Email marketing and newsletter management
• Stripe - Payment processing (Superstack platform only)
• GitHub/Microsoft/Google - OAuth authentication (Superstack platform only)

Each of these services has their own privacy policy governing how they handle your data.

Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by updating the "Last Updated" date at the top of this policy. We encourage you to review this Privacy Policy periodically.

Contact Us

If you have any questions about this Privacy Policy, or if you wish to access, modify, or delete your personal information, please contact us at:

Email: info@siliconwitchery.com