Your External
Brain

SecondYou is a private, local-first AI that thinks, writes, and speaks like you—because the best person to think with is yourself.

Powered by Gemma3N

Your External Brain runs fully on-device using Retrieval-Augmented Generation (RAG) over your personal writings, essays, and past chats to deeply understand your tone, thoughts, and style. Nothing goes to the cloud, and no data is shared—your mind stays yours.

Whether you're brainstorming ideas, co-writing content, or simply thinking through a problem, SecondYou reflects the real you with context-aware responses pulled from your own life.

You can choose to give selective context to the AI to give access to other people in other things (like integrating on your website, support, chat for creators, etc).

More than a chatbot—
an extension of your identity

External Brain

A literal extension of your mind that understands your thoughts, writing style, and decision-making patterns.

Privacy First

Fully local processing means your thoughts never leave your device. Your mind stays yours, always.

Local-First

No cloud dependency, no data sharing. Your AI runs entirely on your device for maximum privacy and speed.

Smart Context

Advanced RAG technology over your personal data creates responses that truly sound like you.

Identity Extension

Converse with past versions of yourself, tune your mood, or explore how you might think years from now.

Flexible Access

Lightweight API for public access, full local experience for power users. Your second brain adapts to your needs.

Your Privacy is Sacred

Built from the ground up with privacy as our foundation, not an afterthought.

Local Processing

Everything runs on your device. No data ever leaves your computer.

Encrypted Storage

Your personal data is encrypted and stored locally with military-grade security.

Zero Cloud Dependency

No accounts, no servers, no tracking. Just pure, private AI assistance.

About

Born from the belief that AI should amplify human intelligence rather than replace it, SecondYou represents a fundamentally different approach to artificial intelligence—one that respects your privacy, understands your uniqueness, and grows with you over time.

Our Mission

To create AI that truly understands and reflects your individual thinking patterns, helping you become the best version of yourself while maintaining complete privacy and control.

Our Vision

A world where everyone has access to personalized AI that enhances their creativity, productivity, and decision-making without compromising their privacy or autonomy.

Ready to meet yourself?

SecondYou isn't just another chatbot—it's a radically personal approach to AI. One where your second brain doesn't just assist, it embodies.

Your ExternalBrain