Map
Coming soonPlot every shortlist pick on a live Google Map โ beaches, restaurants, landmarks โ so the whole group zooms, compares routes, and plans the trip visually in one shared view.
Plan trips, brainstorm ideas, and figure things out in tandem.
Feeling nostalgic? Try a throwback skin
Three steps. No friction. Just open a room, invite someone, and start thinking together.
Start a shared AI conversation in one click.
Share a link. No sign-up required.
Ask, explore, and decide -- together with AI.
TandemChat works wherever a group and an AI can think better together.
Plan your next adventure with someone you love -- not alone in a notes app.
Work through the hard stuff side by side. Weigh trade-offs together with AI clarity.
Riff on ideas together. Let AI build on your collective momentum.
Navigate important conversations with a thoughtful, neutral perspective in the room.
Align on direction and make sharper decisions, faster -- with shared AI context.
Scheme together behind the scenes. Let AI handle the logistics while you bring the magic.
TandemChat is designed to protect your privacy at every step. Your conversations are encrypted and processed ephemerally -- we never store what you discuss, and your messages are never used to train AI models.
And when you bring TandemChat AI into the room, your data stays in the room. No third-party tracking, no ad targeting, no fine print. Just a private space for the people -- and AI -- you choose to invite.
Under the hood, every message flows through a purpose-built real-time pipeline -- from human thought to AI insight in milliseconds.
What about Ubud for day 3?
I found a villa with a pool!
Budget check -- are we under $2k?
@tandem build us a day-by-day plan
Supabase Realtime
Broadcast + Postgres Changes + Presence
Messages
Postgres Changes
AI Stream
Broadcast
Typing
Broadcast
Presence
Heartbeat
Supabase Postgres
Source of truth
Vercel AI Pipeline
Route Handlers + OpenAI
TandemChat AI
streamingHere's a 5-day Bali itinerary under $2k per person: Day 1-2 Seminyak (beach + temples), Day 3 Ubud (rice terraces + monkey forest), Day 4-5 Nusa Penida (snorkeling + cliffs). Villa with pool for all 4: $89/night. Shall I lock this into the plan?
Sub-30ms sync. Every message flows through Supabase Realtime over persistent WebSockets. Presence, typing, and AI streaming all share the same connection -- no polling, no delays.
Zero-knowledge AI. AI context is assembled per-request from the canonical message log and discarded after each run. Nothing is stored outside your room, and nothing is used for model training.
Edge-first delivery. Vercel Route Handlers execute at the edge nearest to your room. Supabase Realtime fans out to all connected clients across 12 regions simultaneously.
On the roadmap
TandemChat already keeps your plan in sync. Next up: maps, bookings, and splitting costs โ without leaving the room.
Plot every shortlist pick on a live Google Map โ beaches, restaurants, landmarks โ so the whole group zooms, compares routes, and plans the trip visually in one shared view.
Let TandemChat Agent dial for you โ restaurants, museums, ferries, and more โ securing reservations for the group while everyone stays in the conversation.
Split activity costs with everyone in the room the moment plans land. Fair shares, zero spreadsheet math, and no awkward Venmo chase after the trip ends.
Start a room and invite someone into the conversation. It only takes a few seconds.