Privacy Policy
Last updated: July 29, 2026
Grainstorm ("we," "us," or "our") operates the website grainstorm.news and related subscriber services, including email newsletters and optional SMS sell alerts for Strategy-tier subscribers. This Privacy Policy describes how we collect, use, and protect your information.
Information we collect
- Account and profile information: name, email address, city, state, subscription tier, and billing status.
- Payment information: processed by Stripe. We receive billing identifiers (such as Stripe customer id) but not full card numbers.
- SMS information (optional): mobile phone number in E.164 format, SMS opt-in status, per-crop alert preferences, and opt-in/opt-out timestamps.
- Usage and delivery data: login/session data via our authentication provider, email delivery metadata, and SMS send/delivery records when you opt in to text alerts.
How we use your information
- Provide and manage your Grainstorm subscription and subscriber dashboard.
- Deliver newsletters and account-related communications.
- Send optional Strategy-tier SMS sell alerts when you have explicitly opted in.
- Process payments and maintain billing records.
- Respond to support requests and comply with legal obligations.
SMS sell alerts (Strategy tier)
SMS alerts are optional and available only to active Strategy-tier subscribers. You may opt in at grainstorm.news/dashboard.html by entering your US mobile number and checking the consent box. Consent is not required to purchase a subscription.
If you opt in, we may send automated text messages when the published Strategy newsletter includes a model-portfolio sell signal for commodities you selected (corn, soybeans, and/or wheat). Message frequency varies depending on market conditions; you may receive zero messages on days with no sell signal, and typically no more than a few messages per month when sell signals occur. Message and data rates may apply.
You may opt out at any time by replying STOP to any message, or by disabling SMS alerts on your dashboard. Reply HELP for assistance.
Mobile information non-sharing: No mobile information will be shared with third parties or affiliates for marketing or promotional purposes. All the above categories exclude text messaging originator opt-in data and consent; this information will not be shared with any third parties.
We do not sell or rent your phone number. SMS messages are transmitted through Twilio, our messaging provider, solely to deliver the service you requested and to process STOP/HELP replies.
Service providers
We use trusted providers to operate Grainstorm, including:
- Supabase — authentication and database hosting
- Stripe — payment processing
- Resend — transactional and onboarding email
- Twilio — SMS delivery and inbound STOP/HELP handling
These providers process data on our behalf according to their own privacy policies and our agreements with them.
Data retention
We retain account and subscription data while your account is active and as needed for billing, support, and legal compliance. SMS opt-in/opt-out timestamps and send logs are retained for compliance and audit purposes.
Security
We use industry-standard measures to protect subscriber data, including encrypted transport (HTTPS) and access controls on backend systems. No method of transmission or storage is completely secure.
Your choices
- Update profile and SMS preferences on your dashboard.
- Manage billing through the Stripe customer portal linked from your dashboard.
- Opt out of SMS by replying STOP or disabling alerts on your dashboard.
- Contact us to request access, correction, or deletion of personal information, subject to legal and billing record requirements.
Children
Grainstorm is not directed to children under 13, and we do not knowingly collect personal information from children.
Changes
We may update this Privacy Policy from time to time. The "Last updated" date at the top will reflect the latest revision.
Contact
Questions about this Privacy Policy or your data: chris.mick@grainstorm.news