Keep Osti nearby through the parties already waiting on your calendar.

Osti is GreyDoor’s AI party-planning companion. Osti creates and maintains your plans, remembers the details, and helps you know what to work on next—whether you are planning Halloween, Thanksgiving, Christmas, a birthday, or an ordinary gathering at home.

Osti can help with:

• Personalized checklists and timelines

• Invitations, RSVPs, and guest communications

• Budgets, purchases, and shopping lists

• Food, drinks, quantities, and serving plans

• Colors, decorations, music, and atmosphere

• Space, parking, weather, children, pets, and accessibility

• Party-day guidance and host preparation

• Shareable photos and notes for future parties

Your membership includes Osti assistance for up to three active parties at one time. You may save additional parties without activating Osti. Completing or canceling an active party releases its Osti slot.

Your first three months are charged together at checkout for $57. After the initial three months, your membership continues for $19 per month until canceled.

If you cancel during the initial three-month period, your membership ends after that prepaid period. Afterward, cancellation takes effect at the end of the current paid month.

Osti uses AI and may occasionally provide incomplete or inaccurate information. Review important details before acting. Osti will ask for confirmation before sending communications or making consequential changes.

Themed and licensed experiences are separate purchases unless expressly included with a product.