Austin, TX

Custom AI automation and software for small businesses.

Built fast. Priced fair. You own everything.

Kallisti Upton
Austin, TX · Working with businesses across the US

What I build

Flat-fee projects. No retainers. No surprises.

Live in 7 days. Month-to-month. You own everything.

Offering Price Timeline
Custom website

Hand-built site, mobile-first, fast as hell, your domain, your code. No website builders, no monthly tax.

$2,500 5-7 days
AI voice agent (use your existing phone)

Answers your phone 24/7 in your voice. Books appointments, takes messages, transfers calls when it matters.

$1,500 3-5 days
Custom website + AI voice agent (combo) Most popular

Both above, wired together. Phone, web form, and calendar all funnel to one place.

$3,500 7 days
Custom automation / integration

Connect the tools you already pay for. CRM to email, scheduler to texts, lead form to phone.

$1,500–3,500 3-7 days
Custom software / MCP build

Bespoke applications, internal tools, MCP servers, dashboards. Built for your workflow.

$5,000+ 7-14 days
Hosting + maintenance

Cloud hosting, uptime monitoring, security patches, small tweaks. Cancel anytime.

$99-300/mo ongoing

Hourly engagements available at $150/hr on request — most clients prefer flat-fee projects.

Recent work

Things I’ve shipped.

Real businesses, live in production. Demo numbers and live URLs below.

Studio 27 — One and Only Studio 27

Custom website + AI receptionist for a tattoo shop in Austin.

Visit live site →
  • Bilingual — handles English and Spanish callers natively
  • Blind transfer — sends real callers to the shop phone
  • Booking — schedules walk-in visits over the phone
Loom walkthrough — coming soon

bizbox-mcp — MCP server

I built a Model Context Protocol server that lets businesses use Claude as a natural-language interface to their actual stack — Jobber, Twilio, GitHub, Railway, Resend.

22 tools · 5 services
Claude Desktop bizbox -mcp 22 tools Jobber Twilio GitHub Railway Resend

Stack: TypeScript + MCP SDK + Streamable HTTP on Railway.

Claude Desktop talks to the MCP server, the server talks to your real tools. No screen scraping, no fragile glue.

Loom walkthrough — coming soon.

Ace Plumbing — voice agent demo

Demo voice agent for a fictional plumbing company, used in content production. Bookings, dispatch, customer service — over the phone.

Loom walkthrough — coming soon

ForThePeople Tattoo

Custom site + AI receptionist for a second Austin tattoo shop.

Kallisti trading agents

Self-built quant trading system. Trade the noise on 1-min timeframes with recovery-mode risk management. Multi-agent architecture in TypeScript on Bun runtime.

Business in a Box — AI agency for trades

My AI agency for tradesmen. Done-for-you AI receptionists, custom websites, and automation systems — built specifically for HVAC, plumbing, electrical, AV, tattoo, and other appointment-based trades. Every build custom, no contracts, you own everything.

bizinabox.one →

BuildaBox — self-serve AI receptionist SaaS

A productized AI receptionist platform I built. Sign up, configure your agent, point your phone number at it — running in minutes, not days. For service businesses that want to do it themselves.

buildaboxagents.com →
Kallisti Upton

About

I work for the people who actually run the businesses.

I work full-time at a pool service company in Austin. I build software on the side because I saw what small businesses actually need and nobody was building it for them.

I know what tools you actually use, I know what’s a waste of money, and I know what works because I built it for myself first.

I work directly with TypeScript, Python, Node, real-time voice infrastructure, and AI tooling. No middlemen, no low-code platforms — every line of your project is custom for you.

Born and built in Texas.

Now

What I’m working on this week.

  • Just shipped

    Alfred — a personal AI assistant that runs my calendar, texts, and a nightly check-in call

  • Currently building

    AI receptionists, custom sites, and local SEO for a portfolio of Austin service businesses

  • Exploring

    Real-time speech-to-speech voice agents — comparing OpenAI, ElevenLabs, and Grok

Contact

Tell me what you’re trying to build.

I read every message myself. Most replies go out within a few hours.

Or just grab a slot:

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