Open alpha · free while in alpha

The second brain
that doesn't need
maintaining.

You've tried Obsidian. You've picked PARA twice. You've rebuilt your vault and it still rots. LoomBrain is hosted, opinionated, and stays good — through Claude Code, Cursor, Claude Desktop, or any MCP client.

Start using it How it works

No credit card. Free while we're in alpha — rate-limited, not paywalled. Paid plan when we hit GA.

How it works

Three steps. Two of them aren't yours.

Every PKM tool you've tried handed you a blank canvas and a silent maintenance contract. Plugins to pick. Taxonomies to settle. Cron jobs to write. Graphs to prune. This is the three-step version. You do step one.

1.

You capture

You already do this. Bookmarks, half-finished screenshot folders, copy-paste into notes you never reopen. Save a URL, a selection, a file, or an agent session — from Chrome, the CLI, MCP, or the dashboard. Add one line of WHY: the reason you saved it right now. That's the whole job.

2.

We organize

This is the part that killed your last vault. Every capture gets classified into PARA, extracted into structured nodes, linked to the rest, and enriched against Wikidata when it earns it. Nightly workers consolidate what's redundant, decay what's dead, and strengthen what you actually come back to. None of it runs on your laptop. None of it asks you for a decision.

3.

Your agent reads

Your current brain doesn't talk. It waits. LoomBrain shows up inside Claude Code, Cursor, Claude Desktop, or anywhere you can plug in an MCP client. Your agent searches the graph, follows the links, and writes back what it learns. You stop visiting a vault. The vault stops being a vault.

What we believe

We already picked. So you don't have to.

You've redesigned your system three times this year. Each time, the graph started empty. Each time, you lost a month. Opinions are the tax you've been paying in setup costs. We paid them.

PARA is the taxonomy.

Projects, Areas, Resources, Archive. Tiago Forte already solved this. Every time you reinvented it with custom folders, you lost the fight. Not a template. Not a plugin. The structure. No more quarterly ontology redesigns. No more "maybe this time it'll stick." You bring the captures. We brought the shelf.

WHY is first-class data.

Your bookmarks folder is an archive of past-you with no notes to present-you. Every capture here carries the reason you saved it — one line, written then, surfaced later. Intent is the part every flat note-taker loses. It's the part that lets your graph answer "what did I think about this?" instead of just "what is this?"

Managed, not self-hosted.

Local-first sounds free until you count the hours. No Postgres. No pgvector. No twenty-one cron jobs. No debugging whether your Opus-dependent pipeline regressed on Haiku. Your vault is free. Your time isn't. We run the pipeline on Cloudflare's edge. You stop being the sysadmin of your own brain.

Your agent is the interface.

You open Obsidian to look at Obsidian. Then you forget to open it for three weeks. MCP is the primary surface — the same one we use internally. The dashboard is there when you want to look. The real loop: capture from anywhere, read from inside your agent. The brain that gets used is the brain that gets better.

Four ways in

Four small tools. No plugin manager.

Obsidian hands you 2,700 plugins and a Saturday afternoon. Every plugin you install is a liability the day its maintainer moves on. We ship four surfaces we built and we maintain. When custom skills come, we'll maintain those too.

CLI

For the terminal. lb capture, lb search, lb tree. Scriptable. Pipeable. No config.

MCP server

The primary surface. Twenty-one tools today, more coming. Your agent searches, reads, writes — without you babysitting the connection.

Chrome extension

One click. URL, selection, screenshot, plus a line of WHY. The pipeline takes it from there.

Dashboard

For when you want to look. Graph, PARA tree, captures inbox, activity. Not the daily driver. Not meant to be.

Works with Claude Code, Cursor, Claude Desktop, and anything that speaks MCP. No integrations to write. No tokens to wire.

Honest filter

Not for you if…

This whole product is one long opinion. Here are the ones we know push some people out. Save yourself the trial if any land.

You want to self-host. Running infrastructure is our job. The whole product only makes sense as a managed service. If you want Postgres on your laptop and a cron job you wrote, go use GBrain. It's a good tool. It's just a second job.
You want to customize the taxonomy. PARA is the bet. No custom top-level categories. No swappable ontologies. No "but my workflow is different." If you've spent more than an hour rearranging your folders this year, we're not selling you the relief you think.
You want a pretty notes app to visit daily. LoomBrain is meant to disappear into your agent. If the joy you seek is opening a sidebar and admiring your backlinks, we won't scratch that. Obsidian will. Heptabase will. Enjoy.
You need team collaboration today. Solo-first through 2026. One graph, one user. If a shared vault is on your roadmap this quarter, don't wait on us. We'll get there — but after a lot of other things.
You want a free tool forever. Free while we're in alpha so you can actually load it up. Paid at GA, by design. Maintenance has to be worth paying someone to do. If it isn't worth paying for, it isn't worth having.

Alpha pricing

Free while in alpha.

Decent rate limits so the pipeline doesn't catch fire. No credit card. No trial clock. When we leave alpha there'll be a paid plan — and we'll email you before we switch anything. No surprise bills. No lock-in. Your graph exports on demand.

Open the app

The second brainthat doesn't needmaintaining.