01 / MAIL
A home for
every conversation.
Bring your inboxes together. Read, reply and find what you need, without losing your place.
A FRIENDLIER KIND OF INBOX
Less inbox.
More day.
Email, meetings and to-dos, together in one thoughtful Mac app. With a little help from Si.
A little room to thinkToday · 2:00–2:30 pm
A LITTLE INTERACTIVE PREVIEW
For everything that starts with
“I’ll get back to that.”
Your mail Your time Your next move
A few less tabs.
A lot more headspace.
Your day doesn’t arrive in neat little boxes. Mailsi helps you put the pieces together.
A home for
02 / CALENDAR
Make room for
what’s next.
See your Google Calendar, check availability and make plans right beside your inbox.
03 / TASKS
“I’ll do that”
becomes a plan.
Turn an email into a task, add a due date and keep the original conversation one click away.
A LITTLE LOOK INSIDE
All the pieces.
One lovely place.
A familiar inbox, a clear calendar and a task list that remembers where things started.
Dates, availability and plans. Without another tab.
Your inbox.
Your business.
Your business.
KEPT CLOSE
It’s your inbox.
Let’s keep it that way.
The current build keeps mail and tasks in an encrypted database on your Mac, with account credentials in macOS Keychain. It connects directly to the providers you choose.
- Encrypted local mail and task storage
- Remote email images blocked by default
- Google sign-in in your own browser
Bring the things you already use.
GmailGoogle CalendarLinearOptionalIMAP + SMTP
Provider access varies. Linear is an optional import; Mailsi doesn’t send your emails to Linear.
Good questions.
Honest answers.
Here’s where we’re at.
What is Mailsi?
Mailsi is an early-access Mac app that brings email, Google Calendar and local tasks together. Si is our little paper helper and the face of the app.
Can I try it yet?
We’re preparing a private early-access release. Join the list and we’ll let you know when you can try it. Google approval and Apple notarization still need to be completed, so we’re keeping the first release small.
Will I need to upload a credentials file?
No. For Gmail, click Sign in with Google, select your account and review the permissions in your browser. Other email providers use IMAP and SMTP settings and may require an app password.
Is Si an AI that reads or sends my email?
Not in this early-access build. Today, you create tasks, check availability and send messages yourself. We’re exploring helpful intelligence, and any future feature that sends email content to an AI provider will need a clear choice from you.
Can I use my Linear tasks?
Yes. You can optionally connect Linear and pull issues assigned to you into Mailsi. Imported issues open in Linear for editing. Local tasks stay on your Mac.
What does it cost?
Public pricing hasn’t been announced. Joining the early-access list is free and doesn’t create a subscription. We’ll share any pricing before you choose to sign up for a paid plan.
Your day called.
It wants a little space.
Meet Mailsi. Make room for the good stuff.