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LobbyStack Review

LobbyStack is an open-source AI receptionist software designed for small businesses to automate phone calls, qualify leads, and book appointments.

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LobbyStack — product screenshot

Why it matters

1Offers a free plan with 30 voice minutes and 10 alert SMS segments.
2Provides self-hosting options for greater control over deployment and data.
3Integrates with existing tools like Twilio for voice and various calendar/email providers.
4Supports specific trades including plumbers, HVAC, and electricians.

Specs

API Available

Yes, public API

overview

What is LobbyStack?

LobbyStack is an AI receptionist tool that enables small businesses to automate phone calls, qualify leads, and book appointments. It functions as an AI-powered virtual receptionist capable of handling phone calls, SMS messages, scheduling, and lead qualification, ensuring businesses never miss an inbound interaction.

features

Key Features of LobbyStack

LobbyStack provides a comprehensive suite of features designed to automate customer interactions and streamline business operations, particularly for appointment-based and service-oriented businesses. Key capabilities include AI-driven communication and robust management tools.

  • AI phone answering and SMS response capabilities.
  • Automated appointment scheduling, rescheduling, and cancellations.
  • After-hours and 24/7 support for continuous customer engagement.
  • Lead qualification, capturing caller names, contact information, and service needs.
  • Call routing with context, including IVR and transfers to human agents.
  • Knowledge base integration, allowing the AI to answer from website content, PDFs, and FAQs.
  • Self-hosted deployment option for data control and infrastructure management.
  • Review of call recordings, transcripts, and summaries for oversight.
  • Dedicated phone number included in all plans.

use cases

Who Should Use LobbyStack?

LobbyStack is primarily designed for small to mid-sized businesses that rely heavily on inbound calls and appointments. Its automation capabilities are particularly beneficial for industries requiring constant customer interaction and scheduling management.

  • Small Businesses: To automate routine phone calls, lead qualification, and appointment booking.
  • Home Services (Plumbers, HVAC, Electricians): For managing inbound service requests, scheduling appointments, and providing after-hours support.
  • Dental Offices, Salons, and Spas: To handle appointment scheduling, confirmations, and customer inquiries efficiently.
  • Consultants and Agencies: For automating initial client contact, lead qualification, and meeting scheduling.
  • Businesses Needing 24/7 Coverage: To ensure no call is missed outside of regular business hours or during high call volumes.

how to use

How to Use LobbyStack

To begin using LobbyStack, users can sign up for a plan and configure their AI receptionist through the web dashboard. The platform requires users to integrate their own provider accounts for telephony and AI services.

  • 1Sign up for a LobbyStack account (Free, Starter, Pro, or Enterprise plan).
  • 2Configure business details, services, availability, and knowledge base via the web dashboard.
  • 3Integrate external provider accounts for telephony (e.g., Twilio) and AI services.
  • 4Train the AI using business FAQs, policies, documents, and website content.
  • 5Set up call routing rules and human agent transfer protocols.
  • 6Monitor call recordings, transcripts, and summaries for performance review.

pricing

LobbyStack Pricing & Plans

LobbyStack offers a tiered pricing structure, including a free plan, to accommodate various business needs. All plans include a dedicated phone number and unlimited booking and contacts.

  • Free Plan ($0/month): Includes 30 voice minutes, 10 alert SMS segments, 2 outbound call attempts, 100 MB knowledge storage, and community support.
  • Starter Plan ($30/month): Includes 150 voice minutes, 50 alert SMS segments, 20 outbound call attempts, and email support.
  • Pro Plan ($100/month): Includes 500 voice minutes, 200 alert SMS segments, 100 outbound call attempts, and priority email support.
  • Enterprise Plan (Custom Pricing): Offers higher volume, multiple numbers, multi-location routing, custom fallback rules, and self-hosting implementation support.

Pros

  • +Open-source core provides transparency and adaptability.
  • +Self-hosting option offers full control over data and infrastructure.
  • +Free plan includes 30 voice minutes and essential features.
  • +Comprehensive AI receptionist capabilities for calls, SMS, and scheduling.
  • +Integrates with existing telephony, calendar, and email providers.
  • +AI can be trained using business-specific knowledge (website, PDFs, FAQs).

Cons

  • Requires users to integrate their own provider accounts for telephony and AI services.
  • Limited public user reviews and reception data available as of August 2026.
  • Self-hosting may require technical expertise for setup and maintenance.
  • Managed cloud hosting is available, but self-hosting is a key differentiator.

Policies

Pricing Page

View Pricing

Similar Tools

LobbyStack vs Competitors

LobbyStack distinguishes itself in the AI receptionist market through its open-source nature and self-hosting capabilities, offering businesses greater control over their data and infrastructure compared to many proprietary SaaS solutions.

1
AIReceptionist

It is a production-grade, open-source AI receptionist that uses OpenAI's Realtime API for high-fidelity speech-to-speech, aiming for human-like conversations without latency.

Like LobbyStack, AIReceptionist is open-source and self-hostable, providing full control over the deployment. The trade-off is that it requires more technical setup and integration compared to LobbyStack's more complete 'platform' offering, as it's a framework for building the agent rather than a ready-to-use application.

2
AI-Call

This open-source, AI-powered calling application leverages voice synthesis and real-time communication technologies to simulate intelligent phone conversations.

Similar to LobbyStack in being open-source and self-hostable, AI-Call gives users full control over their stack. However, it is a more foundational application for AI calling, meaning users would need to build out the full receptionist logic (like lead qualification and complex scheduling rules) themselves, whereas LobbyStack offers more of that out-of-the-box.

3

Goodcall is an AI phone agent specifically designed for budget-conscious small businesses, offering customizable agents to answer calls, book appointments, and capture leads.

Goodcall is a hosted SaaS solution, offering a simpler setup and managed service compared to LobbyStack's self-hosted option. The trade-off is less control over the underlying infrastructure and potentially less customization depth for advanced users who prefer to integrate their own AI/telephony providers.

4
Zeeg

Zeeg offers an AI voice agent that natively handles the entire flow from answering calls to qualifying leads and booking meetings without requiring external integrations for booking.

Zeeg is a hosted SaaS solution that aims for a seamless, all-in-one experience for AI appointment scheduling and lead qualification. Unlike LobbyStack, which allows users to integrate their own providers, Zeeg provides a more bundled solution, potentially offering quicker setup but less granular control over individual components.

5
Upfirst

Upfirst provides a hosted AI receptionist service with strong language support and a focus on direct scheduling, warm transfers, and detailed call summaries.

Upfirst is a hosted SaaS alternative, offering a straightforward setup and managed service, which contrasts with LobbyStack's self-hostable nature. While it provides comprehensive receptionist features, it lacks the open-source transparency and the ability to integrate custom AI/telephony providers that LobbyStack offers.

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