AI Marketing & Automation — Phoenix, Arizona

Your next customer is already calling.

Sigma Design builds AI call agents, search visibility, and cold email systems for small businesses — across the US and internationally. Affordable by design, personal by default. Your success is our success.

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Live signal — our AI agents answer in under five seconds, 24/7

Arizona desert with saguaro cacti at golden hour — home base of Sigma Design in Phoenix, Arizona
01Home base — Phoenix, Arizona. Clients across the US & worldwide.

What we do

Five ways we keep your pipeline full.

Pick one service or let us run the whole engine. Every engagement is scoped to a small-business budget — no bloated retainers, no jargon, just leads and answered phones.

01

Inbound AI Call Agents

Every call answered on the first ring — day, night, weekends. Our AI agents greet customers, answer questions, qualify leads, and book appointments straight into your calendar.

  • 24/7 answering
  • Lead qualification
  • Appointment booking
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02

Outbound AI Call Agents

Friendly, compliant outbound campaigns that follow up on inquiries, re-activate old leads, and confirm appointments — at a fraction of the cost of a call center.

  • Lead follow-up
  • Re-activation
  • Reminders
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03

SEO

Technical fixes, local maps visibility, and content that ranks. We get small businesses found on Google by the customers already searching for them.

  • Local SEO
  • Technical audits
  • Content strategy
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04

GEO

Search is changing. We structure your brand so AI assistants like ChatGPT, Gemini, and Perplexity recommend you when buyers ask who to call.

  • AI search visibility
  • Entity building
  • Citations
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05

Cold Email Marketing

Deliverability-first outreach systems that put your offer in front of the right prospects — researched lists, personal-feeling copy, and replies routed to your inbox.

  • List research
  • Copywriting
  • Inbox placement
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Live audio waveform from an AI call agent on a studio monitor
02Voice AI in production — natural, on-brand, always awake.
Ask what this costs
A small business owner taking a customer call at her family-run store
03The people we build for — owners who answer to customers, not boards.

Our approach

Small business.Personal touch.

We started Sigma Design because small businesses were being quoted enterprise prices for technology that should be accessible to everyone. We keep our systems lean and our pricing honest — because when your phone rings more and your calendar fills up, we win too. Your success is our success.

Affordable by design

Enterprise-grade AI and marketing systems, scoped and priced for small-business budgets.

A personal touch

You work directly with the people building your systems. One point of contact, real answers, no ticket queues.

Arizona roots, global reach

Based in Phoenix, serving small businesses across the United States and internationally.

How it works

Three steps. No mystery.

01

Discover

A free, no-pressure call. We learn how your business wins customers today and where leads are leaking — missed calls, invisible search rankings, cold lists.

02

Deploy

We build and launch your system — AI call agents trained on your business, search and AI visibility work, or a cold email engine — typically live within weeks, not months.

03

Scale

We monitor, tune, and report in plain English. As results compound, we scale what works and cut what doesn’t. You always know what you’re paying for.

Most clients see their system live in 2–4 weeks

Contact

Tell us where you want to grow.

Send a note and a real person — not a bot — will reply within one business day with honest advice and a clear, affordable quote.

  • Sigma Design LLC
    10810 N Tatum Blvd, Ste 102-970
    Phoenix, Arizona 85028
  • Serving small businesses across the US & internationally