About LobbyStack
Voice AI agent that answers business calls, books appointments and transfers urgent calls
LobbyStack vs OpenAI Realtime Agents (2026)
A side-by-side comparison of LobbyStack and OpenAI Realtime Agents, two voice ai agents AI agents. Compare pricing, access model, and key features to decide which fits your workflow.
Category
Voice AI Agents
Voice AI Agents
Industry
Vertical
Horizontal
Pricing
Freemium
Free
Access
Open Source
Open Source
Upvotes
1
7
Views
1
4514
About OpenAI Realtime Agents
Prototype multi-agent realtime voice apps in minutes using OpenAI's Realtime API
Key features compared
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
Supports multiple operating systems (Linux, macOS, Windows, ARM)
Container support
Matrix builds for testing across multiple OS and runtime versions
Live logs with color and emoji
Built-in secret store
Newsletter
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