These companies process customer content or account data to run Brain Dump. None of them train generalized models on your notes.
- Anthropic, PBC — the Claude Haiku 5.5 and Claude Sonnet 5.5 AI models, through Anthropic's commercial API. Anthropic does not train on customer data.
- xAI — Talk to your brain, the optional voice mode (US): a 30-second taste each month on Personal Free, minutes on paid plans. Your phone streams your voice to our servers, which relay it to xAI's realtime API, so your voice and the conversation transcript reach xAI, including anything it reads back to you, such as a reminder or a note snippet. Your phone never connects to xAI directly. Free on-device dictation never leaves your phone. Workspace admins can turn Talk to your brain off.
- Cloudflare, Inc. — hosts the web app and API, stores data (the database, the search index, and background jobs), sends and receives email, and runs two AI models on Workers AI: bge-m3, which indexes notes so search finds them by meaning, and Llama 3.2 3B, which does quick filing (titles, tags, to-dos) for imported notes and backfills.
- Twilio Inc. — text messages (SMS and MMS).
- WorkOS, Inc. — sign-in and single sign-on (SSO).
- Stripe, Inc. — subscription billing. Also receives a short marketing attribution summary (campaign tags and ad click id) with a subscription, when the account has one.
- PostHog, Inc. — product analytics (US Cloud). Receives page and click events from the public site, and from the app only your user id, workspace id, plan and seats, and named product steps. From our server it receives sign-up, workspace and subscription events (plan, seats, amount) with the account's marketing attribution, under a random user id. Never note content, email or name.
Apple Inc. delivers reminders to phones running the Brain Dump app, through Apple Push Notification service. For each one it receives the reminder's text (up to 240 characters) and your phone's push token, and the text can show on your lock screen.