Every inbox. One place.

Ostra brings every address you own into one fast, keyboard-first inbox, and finds the real mail from real people inside the noise.

Join the waitlist Get the desktop app

Gmail · Outlook · IMAP · your own domain via Resend

The Ostra inbox: three accounts in one list, newsletters folded into a bundle row, and a conversation with an investor open.

The name

Ostra means oyster.

In Spanish and Portuguese, ostra is an oyster: a plain shell that holds something worth finding.

Your inbox is the same. Inside the receipts, digests and alerts there are a few emails from people who are waiting on you. An investor asking for a model. A customer who needs an answer. Your mother asking about Sunday.

Ostra opens the shell. Every account flows into one place, the noise folds away, and the pearls stay on top.

Features

Fast enough to keep up. Smart enough to sort.

One inbox, every address

GI

Gmail, Outlook, any IMAP host and your own domain through Resend, merged into one list sorted by time. A colored dot tells you where each email arrived.

Real mail on top

Y

Newsletters, notifications and promotions fold into quiet rows at their place in time. People who write to you stay in plain sight.

Labels that apply themselves

L

Start from a template pack or your own. Ostra labels mail as it arrives, and every correction teaches it.

Never the wrong address

R

Replies come from the address the mail was sent to. New mail goes out from the address you last used with that person.

Drafts in your voice

Tab

A suggested reply waits under every conversation. Press Tab to open it, then make it shorter, warmer or more formal.

A second look before send

⌘↵

Ostra catches the wrong account, a missing attachment, or a line that reads harsher than you meant. It never stops you from sending.

Keyboard first

Your hands never leave the keys.

Every action has a key, and ⌘K finds the rest. Moving through mail is instant, because Ostra reads from a local cache first.

  • command bar ⌘K
  • move J K
  • archive E
  • trash #
  • label L
  • category Y
  • reply R
  • compose C

Private by design

Your mail stays yours.

  • Passwords, tokens and message bodies are encrypted at rest, each with its own key.
  • AI is a switch: turn it off for everything, for one account, or for one label. Off means no mail reaches a model.
  • Ostra never changes your mailbox without you. Archive in Ostra, and it's archived in Gmail too.

Pricing

Free while we're in beta.

Beta

$0
  • Unlimited accounts
  • AI sorting, labels and drafts
  • Web and desktop
  • A direct line to the people building it
Join the waitlist

Pro

at launch

Everything in the beta, plus snooze, send later, follow-up reminders and a focused reply queue. We'll share pricing well before the beta ends, and beta users keep a discount.

Download

On your desktop, or in any browser.

macOS soon
Windows soon
Linux soon
Web open

Find the pearls in your inbox.

We're letting people in a few at a time.