Underdog
A private, local AI for Mac email, calendar, and tasks.
At a glance
Price not confirmed · Source review 2026-11-02- Price & billing
首页观察、未独立核验、购买前请复核官网：the observed FAQ says mail, calendar, notes and AI stay free, but no plan price fact is asserted in this B-mode pass and adoption is invite-only.
- Free allowance
首页观察、未独立核验、购买前请复核官网：the observed FAQ says mail, calendar, notes and AI stay free, but no plan price fact is asserted in this B-mode pass and adoption is invite-only.
- Best suited to
Running a private personal AI for email, calendar, notes and errands on-device.
Fit is editorial guidance, not a measured result.- Platforms
Access: not separately verified. Operating systems not separately verified.
Published-source facts and editorial guidance. No product test is implied. Confirm current conditions before purchase.
No product screenshot is claimed for this listing. Use the official website ↗ to inspect the current interface.
What to know before choosing
Good fit
Running a private personal AI for email, calendar, notes and errands on-device.
Limits and trade-offs
Invite-only beta with device limits; purchase revenue model needs reading before use.
Plans and free allowances
首页观察、未独立核验、购买前请复核官网：the observed FAQ says mail, calendar, notes and AI stay free, but no plan price fact is asserted in this B-mode pass and adoption is invite-only.
Evidence
Official Underdog homepage and FAQs ↗ (reviewed 2026-11-02)
Official published page review; no authenticated product test
Dates: Last reviewed 2026-11-02. Last reviewed is the latest source or editorial review date; it is not a content-change date.
A closer look at Underdog
Underdog is a private personal AI for email, calendar, meeting notes, dictation and errands that runs on the user's own computer, so nothing leaves the house.
Editorial guidance based on published documentation. The workflow below is a suggested starting point, not a measured product result.
When to choose Underdog
- A user wants a personal AI for email, calendar, notes and errands with 100% local intelligence.
- A privacy-minded user wants mail synced directly with the provider, inspectable on-device memory, and a Naval mode that never calls home.
- A Mac user with Apple silicon wants to adopt an invite-only beta personal AI today.
When to choose something else
- A user without an invite or without a Mac with Apple silicon cannot adopt it today; Windows is in beta and other devices are coming.
- A user needing cloud access from any device is outside the on-device model.
A practical starting workflow
- Adopt Underdog with an invite and a Mac with Apple silicon, or join the Windows beta and waitlist for other devices.
- Ask Underdog to handle sensitive tasks such as doctor's appointments, prescription refills or tax paperwork, letting it find what is needed.
- Review the next step Underdog gets ready for approval before any booking or purchase goes ahead.
- Inspect, edit or delete saved memories in Settings, and switch on Naval mode when Underdog should never call home.
Check before committing
- Underdog is in invite-only beta and getting better every day, so availability and behaviour are not final.
- Model speed and score claims are estimates or third-party index scores, not independently verified here.
- This entry describes published homepage features and does not compare assistant quality through testing.
Common questions
Is Underdog free? What is the catch?
Mail, calendar, notes and AI stay free; when asked to buy something, Underdog finds the cheapest, best option and pays with a one-time card made for that order, from which the vendor makes a tiny bit.
Which AI does Underdog use?
Its own models running on the computer, including a small fast model and a larger 27B model, so content is not sent to a cloud AI service.
What stays on my device?
AI processing happens on the computer, where recordings, notes and transcripts are stored; mail syncs directly with the email provider, and sent messages and approved bookings go to their intended recipients or websites.
What does Underdog need to run?
A Mac with Apple silicon, or a Windows PC in beta; iPhone and iPad are coming soon, with Android and Linux also coming.
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Sources and checks
Last source review is not a date of product testing. No rating or test result is implied by inclusion. Check the current plan and terms before buying.