Voice AI agent that answers business calls, books appointments and transfers urgent calls
LobbyStack is the open-source AI receptionist for small business. It answers every call or only the ones your team misses. During the call it books, moves and cancels appointments, answers from your website, PDFs and FAQs, and transfers urgent calls to the right person. You set its behavior with plain-language rules. Calls run on OpenAI GPT-Live and open in 15 languages. Bookings can sync with Google Calendar, Cal.com or Calendly. Other agents can work with it too: its MCP server lets Claude or ChatGPT read calls and book appointments. The code is MIT-licensed.
-
Answers every call, or only after-hours and overflow calls
-
Books, moves and cancels appointments during the call
-
Transfers urgent calls and takes a message when nobody answers
-
Plain-language rules instead of call-flow builders
-
MCP server, REST API and webhooks; MIT-licensed and self-hostable
-
Plumbing and HVAC companies catching emergency calls at night and on weekends
-
Dental and medical offices booking appointments while the front desk is busy
-
Salons and spas taking bookings around the clock
-
Property managers logging maintenance requests and routing urgent ones
-
Letting Claude or ChatGPT check today's calls and book through MCP
Shopify Apps
Wix Apps
Ecwid Apps
BigCommerce Apps
