Privacy Policy
Effective September 21, 2026
The short version. Your image files never leave your computer. We keep what we need to run your account (email addresses, your lab's name and members, and your subscription dates) and nothing else. We don't sell data and don't use advertising trackers.
Your images
Blotto opens your image files in your browser. They are never uploaded. When you quantify, only the region of interest you selected is sent to our server as unlabeled pixel data, without sample names, filenames or identifying metadata. It is analyzed, the numbers are sent back to your browser, and the region is not stored.
What we collect
- Account details: your email address, which you use to sign in.
- Lab details: your lab's name, the email addresses of the members and admins you add, and who owns the lab.
- Subscription details: your trial and subscription dates, and a reference to your purchase in Stripe.
- Usage: the date your lab last ran a quantification, so we know whether a new lab has tried Blotto. We don't record what you measured.
- Payments: handled entirely by Stripe. We never see or store your card number.
How we use it
- To sign you in and give your lab members access.
- To send account emails: sign-in links, invitations, trial and subscription reminders, and receipts.
- To answer you when you write to us.
We don't sell or rent personal information, and we don't use it for advertising.
Services we rely on
We use a small number of providers to run Blotto, each only for its stated purpose:
- Supabase: account and lab database, and sign-in
- Vercel: hosting for the website and application
- Stripe: payments, receipts and tax
- Brevo: sending account emails
Cookies and storage
Blotto stores your sign-in session in your browser so you stay signed in. We don't use advertising or cross-site tracking cookies.
How long we keep it
We keep account and lab information while your account exists. Database backups are kept for up to 30 days. Stripe keeps payment records for as long as the law requires.
Your choices
- A lab owner or admin can remove a member at any time.
- You can ask us to see, correct or delete your information. Email admin@blotto.app and we'll respond within 30 days.
Changes
If we make a material change, we'll email lab owners before it takes effect.
Contact
Blotto, LLC: admin@blotto.app