For work
The noise stays outside.
Cloister reads your mail, meetings, chats and tasks, and lets in only what needs you: ranked, explained, with replies drafted for you to send.

How it works
Everything arrives. Only what needs you comes in.
Cloister sorts every thread into Needs you, Noted or Kept outside, joins what belongs together into cards, and gives you the few that need you one at a time, each with the reason it needs you now. Three rules hold for every one of them.
You send every message yourself.
Replies are drafted and wait for your hand. Cloister has no code that sends, and asks Microsoft for no permission to send.
It shows its evidence.
A card says why it needs you in the words of what Cloister read, and each quote is checked word for word against its source. A quote that doesn’t match is dropped.
It says what it couldn’t check.
Cloister calls a day Quiet only when every source has checked in. If one stops answering, it tells you which.
What it reads
What Cloister reads, and the permission it asks for.
You connect each account yourself, and you can remove Cloister’s access at any time. The full list is in the privacy policy.
Outlook and Outlook Calendar
Reads your mail and calendars, saves drafts for you to send, and files mail only when you say so.
Permissions:
Mail.ReadWriteCalendars.ReadUser.ReadPeople.Readoffline_accessNo permission to send mail.
Microsoft Teams
Reads your chats and channels. It never posts, replies, reacts or marks anything as read.
Permissions:
Chat.ReadChannelMessage.Read.AllTeam.ReadBasic.AllChannel.ReadBasic.AllRead-only.
Gmail and Google Calendar
Reads your mail and calendars, saves drafts for you to send, and archives mail only when you say so. Google’s permission screen names Sanctum, the makers of Cloister and Alcove.
Permissions:
gmail.modifycalendar.readonlyopenidemailGoogle’s Gmail permission would also allow sending. Cloister has no code that sends.
Your meetings
The Cloister app records a meeting when you start it, on Zoom, Google Meet, Teams, Webex or in the room. Nothing joins the call.
Permissions:
Your microphone and your computer’s sound, while you recordOnly when you press record.
Your data
Your work stays yours.
Sealed for each account.
Each account’s database, files and backups are under its own key, and deleting the account destroys the key.
Not used to train AI.
Your mail, chats and meetings are used to do your work. Neither Cloister nor the AI providers it uses train models on them.
Google data, for your features only.
Cloister uses Google user data only to provide the features you see, under Google’s Limited Use rules. How Cloister handles Google user data.
Read the privacy policy and Cloister’s terms. Questions about your data: privacy@usecloister.com.
Pricing
One plan.
US$14.99 a month
Start with 7 days free. The trial starts with a payment method on file, and billing begins on day 8 unless you cancel.
- One subscription for Mac, Windows and iPhone.
- Buy it in the iPhone app, or by card on the web and in the Mac and Windows apps.
- In the US and Canada, in US dollars, plus any tax that applies.
- Cancel any time. How cancelling works.
Download
Install it, sign in, connect your accounts.
Sign in with Apple, Microsoft or Google. Nothing else to install.
- Cloister for MacComing soon
- Cloister for WindowsComing soon
- Cloister for iPhoneComing soon
Questions before then: support@usecloister.com.