Privacy Policy

Last updated: 10 July 2026

Plot45 is built to collect as little as possible. This policy explains what we collect, why, and what happens to it. Plot45 is operated from South Africa and this policy is written with the Protection of Personal Information Act (POPIA) in mind.

If you don't sign in

You can use the analysis tool without an account. Your data and graphs are saved only in your own browser (local storage) — they are not sent to us. Clearing your browser data removes them.

Analytics

We use Plausible Analytics, a privacy-friendly service that is cookieless and collects no personal data — just anonymous, aggregated usage (page views and a few feature events). There is nothing that identifies you, which is why Plot45 shows no cookie banner.

If you sign in

Signing in is optional. When you sign in with a third-party provider (such as Google or Microsoft), we receive a basic profile — your email address, name, and a provider account ID — which is stored by our authentication provider, Supabase. We never see or store your password. A small sign-in token is kept in your browser so you stay signed in. When you are signed in, your work is not kept in the browser's local storage — it lives in your account instead, so nothing personal is left behind on a shared computer after you sign out.

Work you save to the cloud

Files you save to your workspace (labs, sketches, documents) are stored with Supabase and linked to your account. We don't read, mine, or analyse the content of your files; they are processed only to provide the service (saving, opening, showing a student's work to their teacher, embedding a figure in a report).

Student accounts

Student logins on a Teacher plan are designed to hold no student personal information: the teacher chooses a username, and no student email address, real name, or other identifying detail is required by us. What a student saves under that account is visible to their teacher — student workspaces are supervised classroom spaces. If a teacher chooses to put personal information in a username or file, that is under the teacher's and school's control, not ours.

Quotes and contact forms

If you request a quote or contact us, we receive what you submit — typically your name, work email, school, role, and location. We use it only to respond, prepare the quote, and manage the resulting subscription. Form submissions are processed by Netlify (our hosting provider) and delivered to our mailbox, which is hosted by Google Workspace.

How we use information

Account and contact information is used to sign you in, provide the features you use, manage subscriptions and billing, and respond to you. We do not sell your data or use it for advertising.

Service providers

We are a small company and rely on established providers to run Plot45. Your information is handled by them on our behalf:

• Supabase — sign-in, account data, and cloud file storage.
• Netlify — website hosting and form handling.
• Cloudflare — DNS and network services.
• Plausible — anonymous, cookieless analytics.
• Google and Microsoft — optional sign-in.
• Google Workspace — our email.
• Once card payments open, a payment provider (such as Paddle) will process payments — we never see full card details.

These providers store data in data centres that may be outside your country. Each is bound by its own security and privacy commitments; our protection of your data relies on, and cannot exceed, theirs.

Retention and deletion

We keep account data and cloud files while your account is active. After a paid plan ends, cloud files are kept for at least 30 days (see the Refund Policy) and may be deleted after that. We may also delete accounts unused for more than 12 months, with prior notice where we have an email address. You can ask us to delete your account and its data at any time — email us and we will action it within a reasonable time. Residual copies may persist briefly in our providers' backups until those cycle out.

Your rights

You may ask us what personal information we hold about you, ask us to correct it, or ask us to delete it. Email hello@plot45.com from the address on your account and we will help. If you are in a region with specific privacy rights (such as POPIA or the GDPR), we will honour requests those laws give you.

Children

Signing in with your own account requires you to be 16 or older, or to have permission from a parent, guardian, or teacher. Younger students can use Plot45 without an account, or through a teacher-managed student login, which is designed to hold no personal information about them.

Changes

If this policy changes materially, we will post the update here and note the date above.

Contact

Email hello@plot45.com.