Privacy by design: why Hathi never trains on your messages

Most AI services say they care about privacy. Few build their entire architecture around it. Hathi was designed from the ground up so that your messages can never be used to train models — ours or anyone else's.

What "privacy by design" actually means

Privacy by design isn't a marketing slogan — it's a legal standard under GDPR. It means privacy is considered at every stage of engineering, not bolted on afterwards. For Hathi, this means your raw messages are processed to generate a response and extract memories, but they are never retained in a form that could be fed back into model training.

When you send a message, it travels through our secure infrastructure, gets processed by AI models we host ourselves, and produces a reply. The message itself is logged only for delivery-status tracking and is never added to a training corpus.

No third-party AI providers

Unlike most AI assistants, Hathi does not send your messages to OpenAI, Anthropic, Google, or any other external AI provider. Our models run on our own infrastructure within the European Union. This eliminates the risk of your data being retained, logged, or used for training by a third party.

The trade-off is that we have to build and maintain our own models. The benefit is that you never have to wonder where your data ends up.

"If you can't point to the server, you can't guarantee the privacy. We built Hathi so we know exactly where every byte lives."

Your rights, built in

Under GDPR, you have the right to access, correct, export, and delete your personal data. Hathi makes these rights practical, not theoretical. You can export your entire memory as a JSON file with one click. You can delete individual memories or purge everything when you close your account.

We also use the minimal data necessary. We mask phone numbers, store only what's needed for message routing, and keep logs only as long as required for security and fair-use enforcement.

Privacy isn't a feature you opt into. It's the default. And at Hathi, it always will be.