Founder Story

From Dialing Lists to
Building the AI That Dials for You

Devin Mallonee spent years in the trenches of direct marketing — running campaigns, burning through call lists, and watching reps waste hours on voicemails. Then AI changed everything. Here's the story.

Chapter 1

Direct Marketing Taught Me What AI Still Can't Fake

My career started in direct marketing at a time when success was measured in dial rates, pickup percentages, and conversion ratios. I ran SMS blasts, email campaigns, cold outreach sequences — the full stack of interruption-based marketing. I learned quickly that the biggest variable wasn't the offer or the list. It was the conversation.

When a rep actually reached a prospect, magic could happen. But getting to that moment cost enormous amounts of time, money, and energy. For every live conversation, there were dozens of voicemails, hang-ups, and wrong numbers. The math never quite worked at scale — especially for small and mid-size businesses that couldn't afford a full outbound floor.

I became obsessed with that gap: the space between a qualified contact on a list and a real conversation. Everything in between was friction, and I wanted to eliminate it.

~4%
Average cold call connect rate
80%
Of calls go to voicemail
30%+
Lift with AI-powered personalization
Chapter 2

When I Discovered What AI Could Actually Do

I didn't come to AI through hype — I came through necessity. Working across client campaigns at Code Staff, I started integrating automation into marketing workflows: GPT for copy generation, voice synthesis for audio ads, LLM-driven segmentation for email sequences. What started as productivity tools became something much more interesting when I pointed them at the phone.

The first time I heard an AI voice agent handle a real outbound call — answer objections, pivot its tone, stay on script but sound completely human — I had one of those rare moments of clarity. This wasn't a novelty. This was the thing I'd been waiting for since my first day pulling call sheets.

Every workflow I'd built in direct marketing suddenly had a faster, cheaper, more scalable version — one that didn't need a commission structure, didn't burn out, and could run a thousand simultaneous conversations without dropping quality.

“I'd spent years optimizing the human side of outreach. AI let me take everything I learned and run it at a scale that was previously impossible.”

— Devin Mallonee, Founder, VoiceSell AI
Chapter 3

Why I Built VoiceSell AI

The tools that existed were either enterprise-priced black boxes or developer toys that required a team to set up. Nothing was designed for the kind of operator I'd been — someone running lean campaigns, managing contact lists in a spreadsheet, trying to get a real ROI on outbound without a $50k/month contact center contract.

VoiceSell AI was designed from that frustration. I wanted a platform where you could upload a contact list, configure an AI agent trained on your offer, and have it on the phone within minutes — not weeks. Where campaign analytics felt like the dashboards I'd built for SMS and email, not some engineering console. Where small businesses could access the same outreach capability as the biggest players in their space.

Every feature in VoiceSell AI maps back to something I learned managing real campaigns: why connect rate matters more than call volume, why the first five seconds of a call determine everything, why follow-up timing is the most underrated variable in outbound. The AI is the engine — the product philosophy comes from the trenches.

What's Next

Building the Future of Sales Conversations

VoiceSell AI integrates with the CRMs and marketing platforms operators already use — GoHighLevel, HubSpot, Twilio — so outbound AI calling becomes a native part of existing workflows, not a separate tool to manage. The vision is simple: any business, any size, should be able to have a consistent, high-quality conversation with every lead on their list.

I'm building this for the version of me that was three years ago — pulling numbers off a spreadsheet, wishing the phone would just pick itself up.

Full Stack

The Skills Behind the Platform

VoiceSell AI was built end-to-end — from voice AI infrastructure to payments to production deployments. Every layer was designed and shipped by one team, starting here.

AI & Voice

  • LLM Integration (OpenAI, Claude, Gemini)
  • Text-to-Speech (ElevenLabs, Deepgram TTS)
  • Speech-to-Text (Deepgram, Whisper)
  • LiveKit Voice Agents
  • Prompt Engineering & Fine-tuning
  • AI Workflow Automation

Frontend

  • React / Next.js
  • TypeScript
  • Tailwind CSS
  • Stripe Payments
  • Real-time dashboards
  • Mobile-responsive UI

Backend & APIs

  • Node.js / Express
  • REST API design
  • Webhook integrations
  • GoHighLevel API
  • HubSpot API
  • Twilio (Voice + SMS)

Database & Auth

  • PostgreSQL / Supabase
  • SQL query optimization
  • JWT authentication
  • Row-level security
  • User roles & permissions
  • Real-time subscriptions

Infrastructure

  • Linux VPS management
  • Nginx reverse proxy
  • SSL / HTTPS (Let's Encrypt)
  • Systemd process management
  • CI/CD pipelines
  • Domain & DNS configuration

Marketing & Growth

  • Direct mail & SMS campaigns
  • SEO strategy & execution
  • Cold outreach sequences
  • Campaign analytics
  • List segmentation
  • Conversion optimization

Custom Development

Want a Platform Like This
Built for Your Business?

Whether you need a full AI calling platform, a custom voice agent, a CRM integration, or an outbound automation system — I build it. From database design to live deployment, fully custom, no templates.

AI Voice Platforms

Custom outbound/inbound calling agents powered by real LLMs and TTS/STT.

CRM Integrations

Connect GoHighLevel, HubSpot, or any platform to your AI workflows.

Full SaaS Builds

React + Node + Supabase — auth, billing, dashboards, production deploy.

Let's Talk — devin.mallonee@gmail.com

Or connect on LinkedIn