Lampline

by C4rohan

Lampline is a self-hosted tool for building, testing and running AI phone agents on your own computer or servers. It can import agents from Google's Dialogflow CX and CX Agent Studio, and it can test any phone agent by ringing it with an AI caller.

Hidden gemIt is a self-hosted voice agent builder that imports Dialogflow CX and CX Agent Studio agents and can run fully locally with no API keys. Its Evals tab places real phone calls to any agent (Vapi, Retell, IVRs too) using an AI caller and grades them, which is a practical feature that is hard to find elsewhere for free. Best for small teams running phone agents who want cheaper, self-hosted calls and testing.

New and promisingUnder two months old. Expect rough edges and fast changes.

View on GitHub

Stars: 267 +35 a day, est.
Licence: Apache-2.0
Runs on: A small server
Setup: Moderate
Language: Python
Age: 7 days

What you can do with it

Build a phone agent in a drag-and-drop builder that mixes AI steps with scripted pages
Import an existing Dialogflow CX or CX Agent Studio agent, edit it and export it back
Test any phone agent with an AI caller that grades each call against your checks

Could replace

Vapi

Our suggestion based on what it does, not a feature-by-feature comparison.

Ways a business could use it

Run an automated phone receptionist or support line for a few pence per call instead of paying a hosted contact-centre platform's per-call rate
Offer a phone-agent testing service to clients, or check your own IVR or voice agent for faults before customers meet them

Can you use it commercially?

Free to use, change and sell, including in paid products. Keep the copyright notice.

Not legal advice. Read the project's licence file before building a product on it.

Getting it running

Clone the repository and run a script (scripts/docker-up.sh --free) with Docker Compose v2; the free mode downloads about 3 GB of local models on first start.

Follow the official instructions in the project README.

Things to check

Free local mode uses a small model (Qwen3 4B), so replies are slower and simpler than cloud models
Real phone calls need your own Twilio, Telnyx or SIP trunk account, and cloud models need paid API keys
Free test calls rely on Google Voice and a browser extension, and you must press Call yourself
Google Cloud deployment and some PBX integrations (Genesys, Avaya, Cisco) are not yet available
Only test phone agents you own or have permission to call