Launching today
Underdog
The most loyal AI, 100% local and private
1 follower
The most loyal AI, 100% local and private
1 follower
Underdog is a personal AI that runs 100% on your computer. It handles email, calendar, meeting notes, dictation and errands without sending your content to a cloud AI service. Its fast model, Woof 4B, runs at about 115 tokens a second on a MacBook Air, and the 27B model scores 33.7 on the Artificial Analysis Intelligence Index. Invite-only beta on Mac, with Windows in beta.
Underdog is a personal AI that runs on your own computer, built by Conway Research, and it's the most private way I've seen to put AI on top of your email and calendar.
Problem: The information that makes an AI assistant useful (your emails, meetings, appointments, tax paperwork) is the same information you least want to hand to a cloud service. The founder, Sigil Wen, built Underdog after a bug in a popular email app exposed his own private emails.
Solution: Underdog runs the AI on your device. It handles email, calendar, meeting notes, dictation and errands, and for sensitive tasks it finds what you need and gets the next step ready for your approval. Mail syncs directly between your computer and your email provider, and your content isn't sent to a cloud AI service.
What makes it different: The speed comes from building the model and the engine together. Woof is Underdog's own 4B-parameter model (about 2.4 GB), and Husky is an inference engine built only for Woof on Apple silicon. In Underdog's published tests on an M5 Max, Husky was faster than Apple's MLX on all 16 prompt types measured, up to 4.5x. Peak speed was 730 tokens a second, and a follow-up message gets its first word in about 35 ms. There's also a larger Underdog 27B model for harder tasks.
Key features:
Email, calendar, meeting notes, dictation and errands in one local assistant
Woof 4B for speed, Underdog 27B for harder tasks
Saved memories stay on your computer, and you can see, edit or delete them
Strips remote images, scripts and tracking pixels from email
A separate vault per account, with the key kept on your computer
"Naval mode," one switch so Underdog never calls home
Passed Leviathan Security Group's App Defense Alliance assessment (all 20 requirements) and approved by Google to read Gmail and Calendar
Who it's for: People who want an AI assistant for email and calendar without sending that data to a cloud AI service, including for work, where you can hand your security team the security page.
Backed by a16z (which led the first round), Khosla Ventures, Hummingbird, Anthology and angels including Patrick Collison, Naval Ravikant, Guillermo Rauch and Noam Brown. The team's thesis, "Underdog's Law," is that today's frontier-model capabilities will run on personal devices within six months.