The mostloyal AI.

The most

100% local AI. 100% private.

come on. I’ll show you.

Scroll to walk with me

I’m Underdog.

I’m a small but mighty AI model, trained to help you.

I run on your computer, not in a data center. Your data stays private. Less than 4GB on your computer.

I’m loyal. And a good boi.

02 Browser

Give me

I use your browser to book flights, reserve tables, order groceries, shop, and cancel forgotten subscriptions. You approve before I book, buy, or cancel. Take over any time.

united.com/book-flightUnderdog is using your browserTake over

RoundtripOne-wayMulti-cityWhere to?UnderdogRoundtripOne-wayMulti-cityWhere to?Underdog

Find a nonstop SFO → New York flight, Sep 18.Opening the flight search

Sample 1/4_No ticket purchased_

FlightsDinnerGroceriesSubscriptions

I’m very good at fetch.

03 Email

Fast email.

I connect directly to your Gmail and Outlook. Your credentials are stored securely on your computer.

EC⌘KMade for your keyboard.

AIMail

ComposeJD

Inbox 6Important 2Other 4

Today

Maya ChenWednesday’s design reviewCan we meet at 11? I’ll have the revised screens ready.9:42 AM

Elliot ParkCoffee after the call?There’s a new place around the corner.9:18 AM

Morning BriefA few things worth readingYour Monday reading list is here.8:30 AM

Weekend NotesYour weekend, a little slowerA few ideas for a quieter weekend.8:12 AM

Product WeeklyThis week in good designThree thoughtful products we found this week.7:50 AM

Studio JournalA little inspiration for todayFresh ideas from the studio.7:24 AM

New MessageSaving…

ToMaya Chen Cc Bcc

SubjectWednesday’s design review

B_I_UA⌄

SendSend laterRemind meShare draft

Your inbox. Your computer. Your business.

04 Meeting notes

You talk.

Fully private meeting notes, transcribed and summarized on your device. Underdog never sends your audio or notes to a data center for processing.

Monday team syncSample meeting

Monday team sync23:18

Camera offMC

Maya Chen

Camera offEP

Elliot Park

Camera offY

You

CC Call captions

Maya: I’ll finish the signup screens Tuesday. Let’s review them Wednesday at 11 and resolve any open design questions.

MicCameraShareLeave

Underdog

Monday team sync

Sep 14Sep 14 · 10:30 AM3 people24 min

NotesTranscript

Write your thoughts, or pause to generate notes…

Listening on your computer

23:18

Meeting in progressOn your computer

All ears. Every little detail.

05 Dictation

Speak

Underdog turns your voice into words, faster than you can type, in any app. Your audio is transcribed on your device, never streamed to a data center.

M

Maya Chen3:39 PM

How’s the launch coming along?

B_I_S

Message #launch

Draft · not sent

Y

YouJust now

Sent · demo

fnHold fnSpeak naturally.Hold fn

Underdog dictation

Your voice. Your words. Your computer.

06 Calendar

Fast calendar.

I find free time, flag conflicts, and prepare events for your approval. I connect directly to your Google Calendar and Outlook Calendar.

AICalendar

New eventJD

all-day

Launch day

9 AM10 AM11 AM12 PM1 PM2 PM

Morning walk10:00 AM

Monday team sync

Focus time12:00 PM

Coffee with Elliot

Revised screens9:30 AM

Lunch12:00 PM

Weekly planning

Project time1:00 PM

Check signup flow

Lunch12:00 PM

Launch check-in

Focus time11:00 AM

S13M14T15W16T17F18S19

Monday team sync10:30 AM – 10:54 AM

Focus time12:00 PM – 1:30 PM

Coffee with Elliot2:00 PM – 2:30 PM

Your week. Your way.

07 Sensitive tasks

Sensitive tasks.

Doctor’s appointments, prescription refills, tax paperwork. I find what you need and get the next step ready for your approval. Your information isn’t can’t be used to train AI models. It’s all on device.

AIChat

New chatJD

All ···Skills

Ask Underdog

Message Underdog…

Underdog

Return sends · Option-Return adds a line

Things to trySchedule a doctor’s visit

Doctor visitPrescriptionTax return

Your details. Your next step. Your say.

08 He protec

He protec.

I track down your personal information on data-broker sites and send removal requests. Less of you out there.

AIChat

Concept preview

New chatJD

All He protecSkills

Ask Underdog

Message Underdog…

Underdog

Return sends · Option-Return adds a line

Things to tryFind my data. Get it off data-broker sites.

A good boi on guard.

09 ALWAYS ON YOUR SIDE

Your life

I run on your computer. Mail syncs directly with your provider. Messages and bookings you approve go to their intended recipients or websites.

Close to you. Private by nature.

AT HOME, ON YOUR COMPUTER

MailNotesCalendarVoice

Private by nature. Local AI · No cloud AI service

STILL THE SAME SMALL, MIGHTY DOG.

And the rest

more tricks on the way.

Memory you can inspect.

Saved memories stay on your Mac. See, edit, or delete them in Settings.

100% local intelligence.

Summaries, drafts, and answers come from a model running on your computer. Your content isn’t sent to a cloud AI service for processing. Underdog’s models are trained to be fast, power efficient, and mighty on your computer.

Guards the door.

Keeps you safe from remote images, scripts, and tracking pixels — stripped on sight.

Tracks your expenses.Coming soon

Receipts out of your inbox, into a ledger, with nothing to file.

Does your taxes.Coming soon

Every W-2, 1099, and receipt he already saw, sorted into a return you only have to sign.

Protected where he sleeps.

Every account gets its own AES-256-GCM vault. The key lives in Apple Keychain, secured by the Secure Enclave, and never leaves the device — Underdog curls up on top of it.

BEFORE YOU BRING ME HOME

Questions,

Which AI does Underdog use?+

Our own. We are training models that are fast, power-efficient, and small but mighty — built to run on your computer. He may not top the leaderboards, but he is 100% yours: AI processing runs on your computer, without sending your content to a cloud AI service.

How does my email sync?+

Mail syncs directly between your computer and your email provider. Your AI processing happens privately on your computer.

What stays on my device?+

AI processing happens on your computer, where Underdog stores your recordings, notes, and transcripts. Mail syncs directly with your email provider. Messages you send and bookings you approve go to their intended recipients or websites.

What does Underdog need to run?+

A Mac with Apple silicon for the local AI. iPhone and iPad, Windows, Android, and Linux are coming — tick the ones you want and we’ll send one email per build when it ships.

When can I adopt him?+

Today, if you have a Mac with Apple silicon. Download Underdog. For every other device, pick yours below and we will send one email when that build is ready — nothing more.

And what about pricing? ↗

GOOD DAYS START WITH A GOOD DOG.

Bring me home.

Fast email. Calendar. Meeting notes. Dictation. Your own AI. 100% private. On your computer. And I’ll run your errands, too.

Adopt Underdog For Apple silicon Macs

your new best friend.

Waiting for another device? ＋

iPhone, iPad, Windows, Android, and Linux. Pick your devices and hear when I’m ready.

✦✦✦

loyal means loyal

Aligned with you — not advertisers, not an AI lab. You.

Underdog may not be the biggest model in the pack — just underrated and mighty. He listens, he remembers, he tries his best. His AI runs on your computer. Your content isn’t sent to a cloud AI service for processing. Mail syncs directly with your provider; messages you send and bookings you approve go to their intended recipients or websites. Local AI. Loyal to you.

z z z

A NOTE FROM MY CREATOR

“I’m building Underdog for myself.”

Read the founder’s note ↗