RaySensei

Privacy Policy

Your lessons are yours.

This policy explains what RaySensei collects, why, who helps us process it, how long we keep it, and the choices you have. Last updated 16 October 2026.

RaySensei ("we", "us") provides an AI learning companion service that teaches through voice, a live drawing board, and interactive lessons, available at raysensei.com and app.raysensei.com. For anything in this policy, contact us at sarthak@raysensei.com.

Account information. When you create an account we collect your email address and a display name. If you sign in with Google, we receive your email address and the name on your Google account from Google. Passwords and sign-in tokens are handled by our authentication provider (see section 4); we never see your Google password. We also record which version of the terms you accepted and when.

Lesson content. The service works by conversing with you, so we process what you say or type during a lesson, your answers to checkpoint questions, the boards drawn in your sessions, and what Ray says back. Lessons are saved so you can revisit and replay them.

Files you upload. If you attach a photo or PDF to a question, it is sent to an AI model provider so Ray can read it. When you are signed in with an account (not as a guest), we also keep the original file so you can see it again beside your question, open it later from your dashboard, and so a lesson you share can show the picture it is about. Guest uploads are used for that question only and are not kept.

Learner profile. To pick up where you left off, the service writes a short learner profile from your completed lessons: a brief summary, a few observations about how you learn (for example, which ideas you found hard), the topics you have worked on, and recaps of your two most recent sessions. Anything you write about yourself in your dashboard profile is kept with it. This profile is included with your questions when we ask AI model providers to teach you. You can see what the tutor remembers, and clear it, in your dashboard.

Voice audio. If you use the microphone, your speech is streamed to a speech-to-text provider and converted to text. We keep the text as part of your lesson history; we do not store recordings of your voice, build voice profiles, or use your voice to identify you.

Usage and technical data. Server logs (IP address, browser type, timestamps, pages requested, and lesson events, which can include lesson text such as your display name, session titles and what Ray said); playback timing reports from your device (when each sentence's audio and drawing arrived and played, with your browser type, screen size and connection type); error reports from the app; and what each lesson cost us to run. We use these for security, debugging, and understanding how lessons are used.

How you found us. The first time you visit, your browser notes how you arrived: any campaign tags in the link (such as utm_source), whether the link came from an ad (never the ad's click identifier), the address of the page that sent you there (without its query string), the first page you opened, and when. When you sign in, we store that once with your account so we can tell which places bring learners to RaySensei. It is deleted with your account.

We do not collect payment information at this time, and we do not buy data about you from third parties.

  • To run your lessons: generating explanations, drawings, and spoken audio in response to what you ask, including reading files you attach.
  • To remember context between sessions through your learner profile, so a returning learner can pick up where they left off.
  • To improve the service: the people who run RaySensei review lessons, including individual lessons and any you flag, to find where teaching fails, fix bugs, and evaluate quality.
  • To keep the service safe: preventing abuse, enforcing our terms, applying daily usage limits, and protecting the service from attacks.

We do not sell your personal information, and we do not use your lesson content for advertising.

Delivering a lesson involves sending content to the following providers, acting on our behalf:

  • AI model providers: Anthropic (Claude) and Google (Gemini). Your messages, files you attach, your learner profile and the lesson so far are sent to them to plan the lesson, write what Ray says and draw the boards. When a question needs current information, Google may run a web search for the lesson on our behalf. OpenAI is used for a few short steps (such as the greeting at the start of a lesson) and as a fallback when another model is unavailable.
  • Lesson checks: TypeSafe. Short pieces of lesson text (your question, or a sentence Ray is about to say) are sent to TypeSafe's classifier to make quick yes/no decisions, such as whether a question needs a web search or whether a sentence contains maths that needs reading aloud carefully.
  • Speech services: ElevenLabs, Inworld and Cartesia. Audio you speak is transcribed by ElevenLabs. Ray's voice is synthesized from the text of what Ray says by Inworld, or by ElevenLabs or Cartesia when we switch voices.
  • Accounts and database: Supabase. Your account, sign-in, lesson history, learner profile and share links are stored with Supabase, which also handles sign-in (including Google sign-in, where Google is told you are signing in to RaySensei).
  • Hosting and delivery: Vultr and Cloudflare. Our servers, including the files you upload, run on Vultr in Bengaluru, India, with backups on a second Vultr server we operate. Cloudflare carries traffic to the app and hosts this website.

Several of these providers process data outside India, including in the United States. They process data only to provide their service to us and are bound by their own contractual and privacy commitments. We may also disclose information if required by law, or to protect the rights, safety, or security of RaySensei or others.

While your account is active. Lesson history, your learner profile, uploaded files and share links are kept so you can replay and continue past lessons, until you delete them or your account.

Logs and diagnostics. Server logs are deleted after at most 37 days (they are rotated weekly and kept for 30 days after rotation). Playback timing reports, app error reports and a cache of Ray's generated speech are capped in size and the oldest entries are overwritten as new ones arrive, so how long an entry lasts depends on how busy the service is; they are not removed when you delete your account. Web server and process logs are also rotated by size.

Deleting your account. When you delete your account (Dashboard → Profile → Delete account), or ask us to, your account, lesson history, learner profile, share links and uploaded files are removed from our live systems straight away. Some copies take longer to disappear:

  • uploaded files remain in our daily backups until those backups expire; we keep only the newest 30 daily backups, so a deleted file normally drops out of them within about 30 days (longer only if backups pause, because old ones are removed as new ones complete);
  • if someone running RaySensei reviewed one of your lessons, a review copy of your uploaded files (all of them, not only that lesson's) may remain on our second server until we remove it;
  • lesson text in server logs remains until those logs expire (at most 37 days, above), and in the size-capped diagnostic files above until it is overwritten;
  • our database provider's own backups may hold a copy until they expire;
  • anonymised usage totals (what a lesson cost to run, no longer linked to any account) and records we must keep to comply with law may be retained.
  • You can use text instead of voice at any time.
  • You can export any lesson's notes as a PDF or Markdown file, see and download the files you uploaded, and see what the tutor remembers about you, from your dashboard.
  • You can delete a single lesson or revoke a share link in the app, delete an uploaded file (Dashboard → My files), clear the tutor's memory of you (Dashboard → Profile → Clear memory), and delete your account and every lesson (Dashboard → Profile → Delete account).
  • You can request a copy of everything we hold about you, correction of inaccurate data, or deletion by emailing sarthak@raysensei.com.
  • Depending on where you live, you may have additional rights under local data-protection law; we will honor valid requests accordingly.

RaySensei is for learners aged 13 and over; you must be at least 13 to create an account, and we do not knowingly collect personal information from anyone younger. If you believe a child under 13 has an account, contact us and we will delete it. Where a learner is between 13 and the age at which they can consent to data processing in their country, a parent or guardian should review this policy with them and may review or request deletion of their data by contacting us. We collect no more information from young learners than the service needs to teach.

Lessons are served over encrypted connections, access to production systems is restricted, each request for your lessons and files is checked against your account, and uploaded files are stored outside any public web folder. No internet service can promise perfect security, but if we learn of a breach affecting your data we will notify you as required by law.

The app keeps your sign-in session, your first name and whether you have past sessions (so the start page greets you without waiting), a few preferences (such as Ray’s talking speed and the panel size), which introductions you have already seen, where you paused a lesson, and how you first found us (see section 2) in your browser's local storage, so you stay signed in and pick up where you were between visits. These are strictly necessary for the service to work; we set no advertising or third-party tracking cookies and run no analytics scripts. You can clear this storage at any time from your browser; you will simply be signed out.

If this policy changes materially, we will update the date at the top and, for significant changes, note it in the product. Continued use of the service after a change means the updated policy applies.

Questions? Write to sarthak@raysensei.com.