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.
SIMPLE, PLANNED PRICING
A little more room
for your day.
When Mailsi’s paid plan opens, it’s planned to include Mailsi AI and cost:
MonthlyUS$8 / month
YearlyUS$75 / yearUS$6.25 per month, billed yearly
Planned pricing · Billing and cloud plans aren’t open yet. No subscription is created by joining early access.
Good questions.
Honest answers.
Here’s where we’re at.
What is Mailsi?
Mailsi is a 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 download it now?
Yes. The signed, notarized Apple silicon build is available as early access on our download page. Google sign-in is in early access while verification is completed. Google may limit access or display an unverified-app warning. Paid cloud plans are not open yet.
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.
What can Si do with AI?
Mailsi AI is optional. If you enable email search in Settings and choose it for a request, Si searches conversations synced on this Mac and shares only relevant matches for your answer. Calendar access also has a Settings permission; when you include it, Si uses the dates and calendars currently displayed. Selected email content is shared only after you allow it for that request. Reply style matching is a separate opt-in in Settings: up to five sanitized examples from your sent mail may guide a reply draft. Your instruction and selected context go to Mailsi’s service on Netlify and then to OpenAI. Si prepares suggestions for you to review; it does not send email or change your calendar on its own. Read the privacy note.
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.
Your day called.
It wants a little space.
Meet Mailsi. Make room for the good stuff.
Get Mailsi for Mac