// case study
KEEL
Fully autonomous multi-agent B2B outreach platform — a founder runs the whole pipeline from WhatsApp. Built from Chennai.
Claude (Sonnet)FastAPIFirestoreCloud RunPub/SubExpandiInstantly.aiMeta WhatsApp APIGCP
Problem
01
Automate the entire top-of-funnel sales motion — find leads, research them, write personalized multi-channel outreach, qualify replies, and book meetings — with the founder only ever touching WhatsApp.
Architecture
02
architecture diagram
drop SVG/PNG here
What I built
03
- 01A multi-agent system on the Claude API that finds leads, researches each one, and sends personalized messages across LinkedIn, email, and WhatsApp.
- 02Reply-qualification and meeting-booking agents that triage responses and brief the founder.
- 03An event-driven architecture on GCP: FastAPI services on Cloud Run, Firestore for state, Pub/Sub for agent orchestration, integrated with Expandi, Instantly.ai, and the Meta WhatsApp API.
Results
04
800+
Qualified leads generated through the pipeline
1
Interface — founder operates everything through WhatsApp
3
Channels orchestrated: LinkedIn, email, WhatsApp
Stack
05
Claude (Sonnet)FastAPIFirestoreCloud RunPub/SubExpandiInstantly.aiMeta WhatsApp APIGCP
Links