LobbyStack
The open-source AI receptionist for phone calls and appointments
LobbyStack is an open-source AI receptionist platform for small businesses. It answers phone calls, books appointments, handles appointment changes, and transfers calls to a person when needed.
It is built for clinics, salons, repair shops, local service companies, restaurants, and any business that loses revenue when nobody is available to answer the phone.
LobbyStack gives teams a modern AI front desk that can be hosted in the cloud or self-hosted on their own infrastructure.
Website · Try the app · Docs · Self-hosting · GitHub · Discord
Why teams use LobbyStack
Most AI receptionist tools are closed, expensive, and difficult to adapt to real business workflows. LobbyStack is different.
- Open source by default. Inspect the code, self-host it, extend it, and keep control of your data.
- Built for real phone calls. Handle natural voice conversations, interruptions, live transfers, and messages for your team.
- Calls and texts in one place. Review calls, recordings, transcripts, and incoming texts from the same dashboard.
- Scheduling built in. Book, reschedule, and cancel appointments through Google Calendar.
- Designed for small businesses. Guided setup, transparent pricing, and no enterprise-only feature gatekeeping.
- Human fallback. Transfer calls or escalate messages when the AI should not handle something alone.
Core features
☎️ AI phone receptionist
LobbyStack answers inbound calls with a natural voice agent trained on your business information. It can answer common questions, collect caller details, take messages, qualify requests, offer appointment slots, and transfer to a human when required.
💬 Text messages
LobbyStack saves texts sent to your business number and alerts your team. You read the thread and reply by hand from the dashboard. The AI doesn't answer texts; STOP and HELP get fixed replies.
📅 Appointment scheduling
LobbyStack connects to Google Calendar, Cal.com or Calendly, checks availability, offers time slots, books appointments, and sends a confirmation text and one reminder text 24 hours before, if the caller agrees. Callers can also reschedule or cancel during a later call.
📚 Knowledge base
Upload business information, FAQs, services, pricing, policies, and internal notes. The AI uses this knowledge to answer accurately and consistently.
🧑💼 Human handoff
LobbyStack can transfer a live call, take a message, or notify the team by email or opt-in SMS when a person needs to respond.
📥 Shared inbox
Review calls, SMS threads, transcripts, recordings, appointments, and customer details from one dashboard.
🔌 Integrations
LobbyStack books into Google Calendar, Cal.com or Calendly. A REST API, signed webhooks, Zapier and an MCP server connect it to your other tools. It doesn't sync with CRMs or practice-management software yet.
Use cases
LobbyStack can be adapted for many local business workflows:
- Clinics and healthcare offices
- Salons, spas, and barbershops
- Auto repair shops
- Home service companies
- Restaurants
- Dental offices
- Law firms and professional services
- Property managers
- Any business that receives appointment, pricing, hours, or availability questions by phone
Product areas
| Area | What it gives you |
|---|
| Voice reception | Inbound phone and browser calls answered by OpenAI GPT-Live, with phone numbers from Twilio or Telnyx. |
| Business knowledge | Answers from structured business facts, text entries, documents, and imported website pages. |
| Booking | Service-aware scheduling with availability checks and calendar handoff. |
| Appointment changes | Safer cancellation and rescheduling flows with appointment lookup and verification. |
| Human handoff | Live transfer and follow-up tasks for calls that need staff attention. |
| Messages | Incoming texts with manual replies, connected to customer history. |
| Website widget | Embeddable chat, lead capture, and browser calls with per-site access controls. Restricted: new widget keys are off unless you set WIDGET_KEY_ISSUANCE_ENABLED=true. |
| MCP server | A Model Context Protocol server at /api/mcp that lets Claude, ChatGPT and other assistants read calls and book appointments. |
| Dashboard | Calls, messages, contacts, appointments, recordings, transcripts, follow-ups, and analytics together. |
| Usage and billing | Hosted plans, voice usage, alert SMS, transfer attempts, storage, and spending caps. |
| Bring your own API keys | Self-hosted deployments can use your own Twilio or Telnyx, OpenAI-compatible AI, calendar, email, analytics, and billing provider credentials. |
MCP server
LobbyStack runs a Model Context Protocol server, so you can connect Claude, ChatGPT, Claude Code, Cursor, VS Code or any other MCP client to a business and ask in plain language: "Who called yesterday and didn't book?" or "Book Dana Whitfield for a cleaning on Tuesday morning."
This is the beginning of the README. Read the rest at the original. Read the full README ↗
