Open42 · built on gbrain

The AI that knows your company — and turns answers into tools your team can reuse.

Connect your docs, chats, and email. Open42 becomes your team's shared brain — answering with citations, and turning any answer into a one-click Skill anyone can run again.

refund-policy.answer.mdworkspace acme · brain
# How do refunds work?
## Annual plans · enterprise exceptions

Yes — within 30 days of purchase, unless the account has an enterprise exception flagged by legal.

1. refund window is 30 days from invoice
2. enterprise tier overrides require legal approval
3. renewal clause: see section 8 of the MSA

***Cited from your brain — not generated.***

[1]: refund-policy.md   updated 2d ago
[2]: sales-exceptions.md   version 14
Save as Skill
  • ReceiptsEvery answer cites its source, version, and date.
  • HonestAdmits when it doesn't know. Flags stale sources.
  • YoursSelf-host or cloud. One private brain per workspace.
[ How it works ]

Connect, ask, and turn the answer into a Skill.

  • Connect your knowledge

    Notion, Drive, Slack, Gmail, GitHub, Linear — plug in the tools you already use. Each workspace gets its own private brain, on its own database. Never mixed with anyone else's.

  • Ask, and get receipts

    Every answer shows where it came from — the source, the version, the date. Click a citation to jump to the exact line. When Open42 doesn't know, it says so.

  • Save it as a Skill

    Save any useful answer as a Skill — a reusable mini-app. Ask once ('summarize this week's customer calls'), then anyone on your team can run it again with one click.

Skill · v3 · last run 2h ago⌘K

Summarize this week's customer calls

Reads transcripts from Gmail + Drive, groups by account, surfaces three product themes per account, and drafts the Monday digest.

GmailDrive12 sourcescited
Anyone on the team can run this
[ What's inside ]

A brain that answers — and turns those answers into tools.

Open42 connects your knowledge to your team. It cites sources, flags stale info, and turns any answer into a Skill anyone can run again.

Receipts on every answer.

Source, version, and date on every line. No claim without a citation. You can always trace an answer back.

answer · trace

The 30-day refund applies unless the account is enterprise12

Enterprise overrides need legal sign-off3

[1] refund-policy.mdupdated 2d ago
[2] sales-exceptions.mdversion 14
[3] legal-renewal-msa.mdupdated 11d ago

Skills, not just chat.

Turn any answer into a one-click, reusable mini-app the whole team can run. Versioned. Shareable.

Skills · workspace acme3
  • Weekly customer digestran 12×
  • Draft investor updateran 4×
  • Find stale Notion docsran 28×

Honest when it doesn't know.

"I don't have that in your brain." Stale sources get flagged. No confident wrong answers.

chat · no source

user ›what's our refund policy for trial users?

I don't have anything about trial-user refunds in your brain. Add a source, or rephrase.

Your brain, fully isolated.

One workspace, one private brain, one database. Cloud or self-hosted. Your data is never mixed with anyone else's.

runtime · one tenant per workspace
acme

gbrain · isolated

postgres · /data

oauth · per-tenant

globex

gbrain · isolated

postgres · /data

oauth · per-tenant

soylent

gbrain · isolated

postgres · /data

oauth · per-tenant

no shared retrieval layer
[ Connect ]

Connect the tools your team already uses.

  • Notion
  • Drive
  • Slack
  • Gmail
  • GitHub
  • Linear
  • Open42
  • Confluence
  • Hubspot
  • Intercom
  • Zendesk
  • Dropbox
  • Figma

More connectors via Composio. Same security and citations on every one.

[ Architecture ]

Two boundaries. One brain per workspace.

Open42 handles users and metadata. gbrain runs the brain itself. Each workspace gets its own private brain on its own machine — no shared storage between workspaces.

Open42 boundary · user + metadata
workspace brain · per workspacegbrain boundary

User auth

Magic-link sign-in. Open42 holds the server session.

Open42 API

Sessions, connectors, chat routing, Skills.

Metadata DB

Users, workspaces, and encrypted secrets.

gbrain runtime

Private brain per workspace, with scoped OAuth access.

Workspace DB

Pages, chunks, and embeddings. Isolated per workspace.

Your API keys never reach the workspace brain. All Anthropic and OpenAI traffic flows through a per-workspace proxy.
Built on gbrain

We didn't reinvent the brain. We made it run for teams.

gbrain is the open-source agent brain Garry Tan built to run his own daily work. Open42 pins it at a verified version, runs one isolated instance per workspace, and wraps it in the team layer it doesn't ship — auth, billing, connectors, UI.

17,888 pages pages indexed in Garry's personal brainBrainBench P@5 49.1 — beats vector-only RAG by +31MIT · 34 skills · MCP with OAuth 2.1Read the gbrain README
[ Pricing ]

Run it on us, or run it yourself.

Same product, two ways to run it. Self-host the open-source code on your own machines. Or let us run it — one private brain per workspace, billed per user.

Open source

$0

Self-host the whole stack. Bring your own API keys.

Includes:

  • Unlimited workspaces on your machines
  • Bring your own Anthropic or OpenAI key
  • All Skills, citations, and connectors included
  • gbrain runtime pinned to a verified version

Cloud

Most teams
$29/user/mo

We run it. One private brain per workspace.

Start free

Includes:

  • Private brain runtime per workspace
  • Connectors managed for you
  • Magic-link sign-in, billed per workspace
  • Bring your own API key (optional)

Enterprise

Custom

Private cloud, SSO, audit logs, dedicated support.

Talk to us

Includes:

  • Private cloud or on-prem deployment
  • SSO/SAML, audit logs, and data-loss hooks
  • Custom connectors and Skill review
  • SLA with a named engineer
[ FAQ ]

Common questions, clear answers.

How the brain stays accurate, where your data lives, and what a Skill actually is.

  • A Skill is a saved answer. Ask once — 'summarize this week's customer calls' or 'draft the weekly investor update' — and Open42 saves the steps as a reusable mini-app. Anyone on your team can run it again in one click. Skills are versioned, so each run uses the latest sources, not a stale snapshot.

  • Open42 only answers from your workspace brain. When the answer isn't in there, it says so — 'I don't have anything about this in your brain' — instead of guessing. Every claim links back to the exact source line, with the version and date it came from.

  • Each workspace gets its own brain — a private runtime with its own database. On Open42 Cloud, that's a dedicated machine with its own volume. Self-hosted, it's a Docker container with its own volume. There is no shared storage between workspaces, ever.

  • No. Your workspace brain never sees your real Anthropic or OpenAI key. It calls a proxy with a proxy token, and the proxy swaps in the real key on the way out — yours if you brought one, otherwise ours. The brain itself can't read or leak your keys.

[1] refund-policy.md[2] sales-exceptions.mdSave as Skill →version 14

Give your AI the company memory it keeps pretending to have.

Connect your docs in five minutes. Ask the first question. Save the first Skill. From there, your team's brain only gets sharper.

Start free