Inboxbook - DM-to-Appointment Booking Assistant
Turn Instagram DMs, WhatsApp, and texts into confirmed appointments with no double bookings or missed clients.
Solo and small salon pros take bookings across Instagram DMs, WhatsApp, and SMS while paying for a separate booking app, leading to double bookings and paper-notebook backups. Existing tools assume clients use booking links, so DM conversations never become conflict-free appointments.
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The Business
$2-4B
Market Size
$20-$40
Global
Worldwide Potential
Customer
Solo and micro (1-5 staff) beauty and trade pros (stylists, nail techs, barbers, estheticians) who book primarily via Instagram DM, WhatsApp, and SMS.
Pricing
Monthly subscription of $20-40 per pro as an add-on to their existing booking tool. Single paid tier at launch with a free trial; later add a higher tier with multi-channel inbox and calendar sync. Distributed via the Chrome Web Store.
$480K
Estimated Annual Revenue
2,000 customers at $20-40/mo
10% market capture
Features
Sidebar injected into Instagram and WhatsApp web that surfaces booking actions inside the chat the pro is reading.
AI parses incoming DMs to flag booking requests and extract requested service, date, and time.
Built-in availability calendar that blocks double bookings and shows open slots in real time.
Confirm an appointment and auto-send a formatted reply with date, time, and service into the DM thread.
Generates available time options to paste back when a client's requested slot is taken.
Lightweight client profiles tied to each conversation with notes, services, and visit history.
Single panel pulling pending booking requests across Instagram, WhatsApp, and SMS.
Saved quick replies for pricing, policies, and availability questions.
Automated appointment reminders sent back into the original DM channel.
Two-way sync with Google Calendar so the pro's existing schedule stays the source of truth.
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Tech Stack
apis
Instagram Graph / Messenger API
Read and reply to Instagram DMs within Meta platform policy
WhatsApp Cloud API
Send and receive WhatsApp booking messages compliantly
Anthropic Claude
Detect booking intent and extract service, date, and time from messages
Google Calendar API
Two-way sync with the pro's existing calendar
Twilio
Send SMS confirmations and reminders
backend
Next.js API Routes
Backend for calendar logic, intent parsing, and auth on Vercel
hosting
Vercel
Hosts the Next.js backend and API routes for the extension
database
Supabase
Stores appointments, client profiles, availability rules, and user accounts
frontend
5 Day Sprint UI
Component library for the extension popup, sidebar overlay, and calendar UI
WXT (Web Extension Toolkit)
Build, bundle, and ship a Manifest V3 Chrome extension with React
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