Osti
Your party has a planner now.
Osti helps turn your ideas into a practical party plan, keep track of details and suggest what to do next.
Real parties. Real homes.
Osti for One Party
$39.99
One-time purchase. Does not automatically renew.
Osti for one specific party for up to 365 days from purchase. Rescheduling does not restart the clock. Normal planning ends when the party is completed; post-party help continues for up to seven days, but never beyond the 365-day purchase limit.
Osti: Three Months
$57
Paid once for three months from the purchase date. Does not automatically renew.
Choose up to three specific parties for this package. Once a party is designated, it remains one of the three package parties for that purchase term, even if completed, canceled, or deleted.
Osti: One Year
$190
Paid once for one year from the purchase date. Does not automatically renew.
Designate up to six active parties at one time. Completing or canceling a designated party frees an active position for another party during the remaining annual term.
A GreyDoor Goods purchase uses a secure claim link and can be gifted. A direct GreyDoor Events purchase attaches to the signed-in account after payment verification. Neither purchase activates Osti on a party until you confirm it.
Plan the party. Keep the memories.
Osti will help with preparation, timelines, menus, supplies, shopping, guest-message drafts and party-day guidance. You confirm before messages are sent or consequential changes are made.
Create and save basic parties without activating AI. Memberships allow more saved parties; only explicitly activated Osti parties use one of your three slots. Completing or canceling a party releases its slot immediately. Completing a party begins seven days of limited follow-up for cleanup, photos, thank-you drafts, final expenses, notes and reusable host lessons; preparation cannot resume without a new eligible activation and explicit confirmation. Otherwise, the slot is released seven days after its scheduled end.
Completing a mystery closes the game permanently. It does not finish the whole party or release that party’s Osti slot.
Themed and licensed experiences are purchased separately. A mystery purchase does not include Osti access unless the product explicitly says so.
Saved party information remains available after Osti access ends. AI use is subject to fair-use safeguards; these plans do not include unlimited, uncapped AI.
Create or open a basic party