Attaché · The AI-powered email client
Your inbox,
staffed.
Attaché is an email client, powered by AI: connect the Microsoft 365 or Gmail account you already have, and it becomes the place you read, organize, search, and answer your email. Decisions ranked, replies drafted in your voice for your approval, promises tracked — and a receipt for every single action the AI takes.
Works with Microsoft 365 and Gmail · Nothing sends without your approval — per message, or via a rule you enabled
Hi Mara — Net-30 works on our side. I'll countersign today; invoices route to AP as before. Anything else blocking the renewal?
What is Attaché?
Attaché is a subscription web application: an AI-powered email client. You connect the email account you already have — Gmail, Google Workspace, Microsoft 365, or Outlook.com — and Attaché becomes the place you read, organize, search, and answer your email. It ranks what actually needs your attention, drafts replies in your own voice for you to approve, tracks the commitments made in your mail, keeps your calendar in view for meeting preparation, and records every action it takes in an activity log you can audit and undo.
Attaché is an independent product and is not affiliated with or endorsed by Google or Microsoft. It works alongside your existing account — your mail stays in your mailbox, and you can disconnect at any time.
How Attaché uses your account access
- Read and organize your email — to display your inbox, triage it, label and archive it, and answer your searches with citations. Nothing is deleted without your action.
- Send email — only messages you have written or explicitly approved. The one exception is an auto-reply rule you individually switch on (such as out-of-office); every send is logged in your activity log.
- View and edit calendar events — to show your schedule, create the meetings you ask for, and prepare you before each one.
Attaché's use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements: your data is used only to provide these features — never for advertising, never sold, and never used to train generalized AI models. Details in our privacy policy.
Built for what the giants can't ship
Summaries and generic drafts are free everywhere now. Attaché competes on the things incumbents structurally cannot do: real autonomy with receipts, one brain across providers, and a context graph that works for you — not their ad models.
| Capability | Attaché | Outlook + Copilot | Gmail + Gemini | Superhuman |
|---|---|---|---|---|
| One brain across Microsoft 365 + Gmail | Yes | — | — | Gmail-first |
| Ranked decisions, one at a time (the Deck) | Yes | — | — | split inbox |
| Replies pre-drafted in your voice | Yes | generic drafts | generic drafts | Yes |
| Ask your inbox — answers with citations, attachments included | Yes | summaries | summaries | Ask AI |
| Commitments tracked in both directions | Yes | — | — | — |
| Autonomy earned per rule, receipts + undo for every AI action | Yes | — | — | — |
| Follow-up sequences that stop when they reply | Yes | — | nudges | reminders |
| Automation canvas with human approval gates | Yes | Power Automate, separate | — | — |
| Connect your own AI assistant (read-only MCP) | Yes | — | — | — |
| Never trains shared models on your mail | Yes | enterprise terms | workspace terms | Yes |
| No tracking pixels, ever — sent or received | Yes | — | — | blocks inbound |
| Flat pricing, no AI usage caps | Yes | per-seat add-on | tiered AI | AI caps |
Competitor capabilities as publicly shipped, August 2026. Corrections welcome.
Verbs on your mailbox, not chat bolted onto IMAP
The Deck
Email as ranked decisions, not a pile. One card at a time, each explaining exactly why it needs you. Queue Zero is maintained by the system, not ground out by you.
Recall
Ask in plain language and get answers with numbered citations to the exact messages — attachments are part of the corpus, not dead weight.
Ghost drafts
Replies are already written in your voice when you open them, built from your own past answers. Nothing sends without your explicit double-confirm.
The Commitment Ledger
Every promise you made and every promise you're owed, extracted from real sentences, with due dates and sources. Nudges come pre-drafted.
The Paper Trail
Every AI action, forever, with its reason — filterable, undoable. Undo an autopilot action and the rule that caused it loses autonomy automatically.
Automation Canvas
Node graphs on inbound mail: classify, extract, look up, draft — with a human approval gate wherever you want one, and receipts everywhere.
Meeting prep
Thirty seconds before a meeting: every open thread with the attendees, unresolved commitments, drafts ready to go. Calendar-synced from your account.
Brand Studio
Drop in a logo and brand colors; get professionally designed, bulletproof signatures that render correctly in Gmail, Outlook, and Apple Mail.
Your mail is not our training data.
Everything Attaché learns from your mail — your voice, your rules, your priorities — stays in your account and dies with it. Disconnect an account and its data is deleted immediately, not archived.
- No shared-model training on customer mail, contractually
- Malicious mail is quarantined: it can never reach a tool or a draft
- Hard invariants live in code: nothing sends beyond your approvals and the rules you enabled
- Remote images blocked until you ask; tracking pixels never load
- Read-only MCP lets your assistants query mail without raw OAuth access
Flat pricing. No AI caps.
Every account starts with a free month of Professional — no card, no trial-ending surprise. Cancel any time.
Solo
The staffed inbox, for one mailbox.
- 1 connected mailbox
- The Deck, Brief, and Recall with citations
- Ghost drafts in your voice
- Commitment Ledger + Paper Trail
- 90 days of searchable history
Professional
Every account you run, fully automated.
- Up to 5 mailboxes, unified
- Everything in Solo, full-archive Recall
- Follow-up sequences + Automation Canvas
- Calendar sync + meeting prep dossiers
- Mailbox MCP for your AI assistants
- Brand Studio signatures
Team
The whole team, centrally managed and audited.
- Everything in Professional, per seat (3+ seats)
- Central admin console + user management
- Deployment-level AI provider control (BYO keys or local models)
- Org-wide Paper Trail audit + decision receipts export
- Shared automation gallery + org standing rules
- SSO / SCIM and white-glove onboarding
- Priority support with a named contact
Enterprise
Professional for everyone in the company at $25 per licence, from 20 to 1,000 licences. You buy the licences and invite people yourself — each one gets the full feature set.
More than 1,000 people? Contact us and we will price it with you.
Free month first — no card. Buy licences when you are ready.