Belle

Your AI agent picks up the phone so you never have to.

ROUND 1 DEADLINE

VOTING CLOSES THURSDAY, MARCH 26

Belle is live in Round 1 right now. Voting closes Thursday, March 26, so if you're backing this project, send people into the matchup before the round locks.

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Share URL

https://agentmadness.ai/entries/belle

Builder

Mark Swendsen

Build Type

Agent

Lifecycle

Live product

Consensus Score

83.6

Region

REGION 3

Seed

9

Current Matchup

REGION 3 Round 1 • Round 1

Opponent

Life Coach OS

Project Link

https://gamma.app/docs/Belle-Technical-Architecture-474ue50qhsafb1k?mode=doc

Demo Link

https://youtube.com/shorts/c5XnaoozW2E?feature=share

CATEGORIES

Audio / VoiceConsumer UtilityAutomation / Workflow

Go Deeper

Belle is an AI agent with a real phone number and a human voice that handles any task requiring an actual phone call — the ones humans dread, forget, or procrastinate on. Real calls Belle has made: navigated Costco Pharmacy's IVR and refilled three prescriptions by Rx number, booked dinner reservations via OpenTable, confirmed appointments, and formally RSVP'd to events. Belle runs on Retell AI with an ElevenLabs voice — authoritative, warm, American male. She lives inside the OpenClaw fleet and is delegated to by Dr. Theo (the orchestrator). When Mark says "refill my prescriptions," Theo delegates to Belle. Belle handles the call, confirms completion, and reports back. No hold music for humans. Ever.

Stack Used

Retell AI, ElevenLabs, Twilio, OpenClaw, Claude