Your people, together
Family, friends, and trusted groups share one place for plans, decisions, and daily logistics.
Pre-launch beta
Join waitlistJoin the waitlist. Create an account and Cosmo will notify you when they're ready.
Cosmo AI Messenger
Where your people and your AI live together.
A private messenger for families and friends with the Cosmo AI assistant embedded in each chat to handle coordination and logistics for the group.
Family logistics
2 people · Cosmo is here
Today
Reminder set · 5:15 PMThe Saturday pickup, handled
Cosmo checks the calendar and covers the handoff.
Reservation confirmed · 6:30 PMDinner booked in the thread
Five minutes from the field, vegetarian mains for Ashley.
4 of 5 voted · Cabin tripGroup decisions, decided
Summarize, compare, vote, and follow up without switching tools.
About
A messenger for shared life.
Everyone else bolts an agent onto your inbox. Cosmo starts where coordination already happens: the thread.
Coordinate everything. Share only what you choose.Cosmo helps with the handoffs, reminders, and decisions that make group life feel heavier than it should.
Cosmo in the thread
Ask once. Cosmo can summarize the plan, compare options, draft the reply, or prepare the next step.
Memory you can see
Preferences, constraints, and loose ends become visible context, not buried chat history.
Share only what you choose
Connections are scoped, calendar writes ask first, and trust controls stay close to the conversation.
Household context
The details people keep retyping.
Useful help depends on the people, preferences, constraints, commitments, and loose ends already in play. Cosmo keeps that context visible and correctable.
The more your household shares, the less everyone has to brief the thread.
Sarah is gluten-freeDad prefers morningsPickup is ThursdayGroup wants parkingDana needs a replyCalendar is scopedProfessional
Precise answers, clean drafts, and coordination that respects the room.
Friendly
Warm when it helps, brief when the thread needs momentum.
Proactive
Cosmo can notice loose ends and ask before taking sensitive steps.
Voice
An executive assistant, in text.
Cosmo can be casual with your family, polished with a third party, and exact when the details matter.
Groups first
Made for the threads people actually use.
Direct chats are fast. Group chats are first-class. Cosmo can summarize, compare, vote, schedule, and follow up without making the group switch tools.
Direct chatsGroup chatsPeoplePlansFollow-upsCalendar
Privacy and control
Trust and privacy by design.
Cosmo was built from the ground-up to ensure you have control over your data with respect to how our AI uses and accesses it. Messages are encrypted following best-in-breed methodologies, data and context are transparent and reviewable, and you have full control over what you share and with who.
Read the Trust pageScoped by thread
Cosmo works from the conversation, people, and connections involved in the request.
Visible memory
Review what Cosmo remembers, inspect details, and correct or remove editable facts.
Approval before action
Calendar writes require confirmation. Higher-impact actions should follow the same pattern.
Integrations
Connected to the tools your household already uses.
Cosmo works with the services you rely on — so plans, confirmations, and calendar events flow in automatically without forwarding or copy-pasting.
Google CalendarGoogle DocsGoogle SheetsGmail
Bring Cosmo into the thread.
Create an account to join the waitlist for a messenger where your people and your chief of staff can coordinate in one place.