Short answer: Underdog is a personal AI agent. 100% local personal AI for email, calendar, meeting notes, dictation and errands — runs on your device, not in the cloud.

Underdog

personal agent

Key facts

Website	https://underdog.ai/
Vendor	Conway Research (founded by Sigil Wen, per TechCrunch)
Channels / category	Mac (invite-only Apple silicon beta); iPhone and iPad on the App Store (no invite needed per site FAQ); Windows BETA; Linux and Android on the way (underdog.ai). TechCrunch (6 Oct 2026) described Macs and Windows initially with Linux, iPhone and Android coming soon.
Pricing / availability	100% free because it runs on your computer (underdog.ai/pricing); monetization is a tiny take when the agent buys something with a one-time card (site FAQ). Never ad-supported (TechCrunch).
Launched	2026-10-06
Funding (reported)	First round raised April 2026 (underdog.ai); a16z led per a16z announcement (Chris Dixon) and TechCrunch; amount and valuation undisclosed. Investors named on site/TC: Andreessen Horowitz, Khosla Ventures, Hummingbird, Anthology fund (Menlo + Anthropic), SV Angel, Breakneck; angels include Patrick Collison, Naval Ravikant, Guillermo Rauch, Noam Brown (and Deedy Das per TechCrunch).
Channels confirmed	Desktop appMobile app
From the site (verbatim)	“A loyal AI for your mail, calendar, and everyday work. Runs locally on your computer.”
Sources	[1] [2] [3] [4] [5]
Last checked	2026-11-11

What can Underdog do?

Invite-only beta launched Monday 6 Oct 2026; founder Sigil Wen (Thiel Fellow); company Conway Research source
Product: your own AI for email, calendar, meeting notes, dictation and errands; 100% local AI, 100% private source
Platforms on site: Mac; iPhone and iPad on App Store; Windows BETA; Linux and Android on the way. Mac invite-only (Apple silicon); iPhone/iPad no invite needed (FAQ) source
Powered by Husky inference engine Wen built; uses a 27B reasoning model fine-tuned from Qwen3.8-27B (TechCrunch) source
Models named on site: Woof 4B (fast), Saluki 27B (light), Underdog 27B (smart); Underdog 27B built on Qwen 3.8 27B; site claims 33.7 vs 31.9 for Claude Opus 4.6 Max on Artificial Analysis Intelligence Index (speeds are estimates per site disclaimer) source
Pricing: 100% free because it runs on your computer; tiny take when agent buys something with a one-time card source
Free at first, never ad-supported; plans take a tiny % of payment transactions via Stripe (Patrick Collison angel) source
Security: passed Leviathan Security Group App Defense Alliance assessment (all 20 requirements); Google approved Gmail/Calendar access; pen tests under way source
Privacy: AI processing on device; mail syncs directly with email provider; memories on device; Naval mode never calls home source
First funding round raised April 2026 (site); a16z led the round (a16z announcement, 2 Oct 2026); round size undisclosed source
Featured in TechCrunch text-agent roundup 10 Oct 2026: invite-only beta early Oct, on-device, Mac/Windows initially, free initially, never advertising source

Frequently asked questions

What is Underdog?

100% local personal AI for email, calendar, meeting notes, dictation and errands — runs on your device, not in the cloud.

How much does Underdog cost?

100% free because it runs on your computer (underdog.ai/pricing); monetization is a tiny take when the agent buys something with a one-time card (site FAQ). Never ad-supported (TechCrunch).

Compare Underdog

Related personal agents

Meta Muse

personal agent

Meta's personal AI agent: message it in the Muse app or WhatsApp, and it works on your goals inside a dedicated secure virtual machine.

Amoo

personal agent

StepFun's personal AI agent built into Step AOS 1.0, the operating system of its STEPX Neo phone: tell the phone what you want and Amoo carries out the steps across apps and services.

Bees

personal agent

Free open-source desktop app that runs a team of AI agents on your computer; bring your own model; asks before risky actions.

Use cases to try

Updated 2026-11-11