Privacy Policy.

Last updated: August 10, 2026

Overview

QuantStack ("we," "us," or "our") provides licensed automated trading strategies for the NinjaTrader 8 platform. This policy explains what personal information we collect through our website (quantstackai.com) and our licensing software, how we use it, and who we share it with. We collect only what we need to sell, license, and support our strategies.

Information we collect

• Email address — when you subscribe, request a license, or contact us. We use it to deliver your license keys and download, send account and subscription notices, and respond to support requests.
• Payment information — collected and processed entirely by our payment processor, Stripe. We never receive or store your full card number, CVC, or bank details. We retain a Stripe customer and subscription identifier so we can tie an active subscription to your licenses.
• License and machine data — when you activate a strategy, our software sends a license key and a machine identifier (a one-way SHA-256 hash derived from your operating system's machine GUID) so a license can be bound to a single machine. We cannot reverse this hash to identify your computer beyond license enforcement.
• Technical data — when your software activates or checks in, and when you submit a form, we log the request's IP address and timestamp. We use this for security, abuse prevention, and rate limiting.

How we use your information

• To issue, deliver, activate, and validate your license keys.
• To provide the software download and product updates tied to your keys.
• To process subscriptions and enforce access — licenses are automatically suspended if a subscription is cancelled or a payment fails.
• To respond to support inquiries and send essential service notices.
• To protect our systems from fraud and abuse.

We do not sell your personal information, and we do not use it for third-party advertising.

Payment processing

Payments are handled by Stripe, a PCI-compliant payment processor. When you check out, your payment details are submitted directly to Stripe. Their use of your information is governed by Stripe's own privacy policy.

Cookies and tracking

Our marketing website does not set advertising or third-party tracking cookies. The checkout flow is hosted by Stripe, which may use cookies necessary to process your payment and prevent fraud.

Service providers

We rely on a small number of infrastructure providers to operate QuantStack:

• Cloudflare — website hosting, license database storage, and transactional email delivery.
• Stripe — payment processing and subscription management.

These providers process data on our behalf under their own security and privacy commitments.

Data retention

We retain your email, license records, and subscription identifiers for as long as your account is active and as needed to provide support, meet legal and accounting obligations, and enforce our licenses. Activation and check-in logs are retained on a rolling basis for security purposes. You may request deletion of your personal data as described below, subject to records we are required to keep.

Your rights

Depending on where you live, you may have the right to access, correct, export, or delete the personal information we hold about you, and to object to certain processing. To make a request, email us at support@quantstackai.com and we'll respond within a reasonable timeframe.

Children

QuantStack is not directed to anyone under 18, and we do not knowingly collect personal information from children.

Changes to this policy

We may update this policy from time to time. When we do, we'll revise the "Last updated" date above. Material changes will be communicated where appropriate.

Contact

Questions about this policy or your data? Email support@quantstackai.com.