Build your own AI receptionist with a free, open-source stack
A voice agent that answers every call, books appointments and answers questions in a natural cloned voice, day and night.
Front desks miss calls every day, and every missed call is a lost booking. An AI receptionist sold for $300 a month pays for itself with one saved appointment.
The stack
- Chatterbox ↗Clones a warm, natural voice for the receptionistMIT
- Whisper ↗Understands what the caller saysMIT
- LiveKit ↗Takes live phone calls in real timeApache 2.0
- Claude ↗The brain: reasons, plans, writes the code and talks to usersPaid API
How to build it
- 1Connect a phone number to LiveKit so calls stream in live.
- 2Transcribe the caller with Whisper and reply with a Chatterbox voice.
- 3Let Claude follow the business's script, booking rules and FAQs.
- 4Book straight into the calendar and text a confirmation.
- 5Sell it per location per month.
100 clients at $300 a month is $30,000 a month.
- Dentists
- Realtors
- Gyms
- Clinics
- Salons
- AI image generator API →
- Qwen-Imagefree
- Claudepaid
- A rented cloud GPUpaid
- Private ChatGPT for companies →
- LibreChatfree
- Claudepaid
- MCP connectorsfree
- AI employee for one niche →
- Claudepaid
- OpenClawfree
- Lightpandafree
Common
questions.
Straight answers. If yours isn't here, ask on a 20-minute call.
What is this list?+
Every week our reels break down an AI product a real company is making money with, and the free, open-source stack you could build your own version on. This page keeps all of them in one place, newest first, with the tools, the licences, the money maths and the reel.
Is the stack really free?+
The software is. Every tool listed is open source or fair-code, and the licence is shown next to it so you can check commercial use. You still pay for hosting, GPUs and the AI model's API, which for most of these products is a few hundred dollars a month at launch.
Which licences allow commercial use?+
MIT and Apache 2.0 allow commercial use with attribution. AGPL-3.0 does too, but if you change the code and offer it as a service you must publish your changes. Fair-code licences such as n8n's Sustainable Use License allow internal and client use but restrict reselling the tool itself, so read them before you build on them.
Can Axionry build one of these for me?+
Yes. We build AI products on open-source stacks with $0 upfront: each checkpoint is invoiced only after you have seen it working. Book a 20-minute call and bring the niche you want to sell to.
Want your own AI receptionist built for your niche?
Twenty minutes, straight to the engineer. No sales rep, no deck.