Second brain app

A second brain app that writes itself

Sofie Wiki is a second brain with an AI that captures, organizes, and links your notes for you. You think out loud, the wiki takes care of the structure. Free for you, upgrade for your team.

The second brain method is simple in theory: capture everything you learn, organize it, and retrieve it when you need it. The hard part is the organize step. Most second brain apps hand you a blank note and a tagging system, then leave you to do the filing. You start strong, fall behind, and end up with a graveyard of unlinked notes.

Sofie Wiki removes the part everyone gives up on. You chat with an AI assistant, it creates or updates the right page, cross-links related entries, and versions the change. Your second brain stays current without you sitting down to organize it on a Sunday.

The reading experience is familiar: a Wikipedia-style interface with table of contents, search, categories, and full revision history. You do not need to learn a new tool to retrieve your own thoughts. You ask, you read, you get on with your day. And when you bring it to your team, the same wiki scales up to a shared workspace.

What you get with Sofie Wiki as your second brain

Capture by chatting

Talk to the assistant in plain language. Send a link, a half-thought, or a voice memo transcript. The AI files it on the right page and cross-links it to what you already know.

A brain that organizes itself

No folders to maintain, no tags to babysit. Related notes cross-link automatically and every change is versioned. Your second brain updates itself as you learn and change your mind.

Find anything in seconds

A Wikipedia-style reading interface with table of contents, hyperlinks, and categories. Stop scrolling through a notes app to find the thing you wrote down three months ago.

Remember every version

Every edit is tracked. Go back to any previous version, see the diff, and restore when an idea evolved in the wrong direction. Your second brain has an undo button.

Start your AI knowledge base

Start free. No credit card required. Upgrade when the wiki is part of your day.