Underdog

Yes. Underdog’s pricing page says it is free because the AI runs on your own computer, so there is nothing to bill. Its terms add that if this ever changes, users will be told clearly before anyone is charged. Access currently needs an invite; without one you can join the waiting list on underdog.ai.

It triages and drafts email, manages your calendar, records and summarizes meetings, types dictation into other apps and answers in chat. A browser agent works in your own browser for errands, and for sensitive tasks such as doctor’s appointments, prescription refills or tax paperwork it finds what is needed and prepares the next step for your approval.

A Mac with Apple silicon, and a Windows PC in beta. Underdog says iPhone, iPad, Android and Linux versions are on the way and offers an email alert per platform. Mail and calendar connect through your own Google or Microsoft account.

Underdog says no AI processing happens in the cloud: its own models (Woof 4B, Saluki 27B and Underdog 27B, built on Qwen 3.8 27B) run on your computer, and it uses no third-party AI provider. Mail syncs directly between your computer and Google or Microsoft. Its servers hold your account email and membership, an optional daily usage count that contains no content, and crash reports only if you choose to send one.

Underdog says the browser agent asks before it buys, pays, sends or deletes anything, and fills saved passwords without reading them. Its terms note that what the browser agent does in your browser counts as you doing it and that AI output can be wrong, so check drafts and bookings before you approve them.

Underdog’s security page lists a passed App Defense Alliance CASA Level 1 assessment by Leviathan Security Group (September 2026) and Google’s restricted-scope approval for Gmail and Calendar access. A penetration test and an independent teardown of the Mac app were still under way when this page was checked. Naval mode limits the app to the servers it needs, such as your mail provider.