Personal AI Agents
Personal intelligence, properly kept.
Not a cloud subscription. A device on your network — configured around your life, security hardened before handoff, maintained every month. You message it on Telegram. It does the rest.
The Problem
AI subscriptions remember you now — on their servers, under their terms. Retention policies change without warning. Your preferences, your context, your history — stored in infrastructure you'll never see.
Both major AI providers now train on your conversations by default. You can opt out — if you find the toggle. Default retention is up to five years.
AI subscriptions give you a login. That's it. No configuration around your workflows, no personalization for your business, no support when it breaks.
None run 24/7 as a dedicated agent on your own hardware. You open a tab, you type, you close the tab. It waits for you — it never works for you.
The Solution
A small device on your network. Not a cloud subscription. You talk to it through Telegram — always on, always yours.
Not learned over months of chat history on someone else's servers. Configured during a personal consult — your workflows, your tone, your rules — built in before handoff.
No inbound ports. Invisible from the internet. Broadcast-only on your local network.
We install, configure, secure, and maintain it. Monthly tune-ups included. You never touch a command line.
Security Architecture
No SSH, no port forwarding, no VPN holes. The device is invisible from the internet.
Every device has its own cryptographic keypair. If one is compromised, revoke it. No shared secrets.
The device calls out for updates only. Castellan never pushes in. Your data is never transmitted.
Conversations, memory, and context live on the device. Castellan never accesses your data — only the system that runs it.
The cloud manages the device. It never sees your data.
True today. True in every phase that follows.
Who It's For
Drowning in email, follow-ups, and admin work every night after the real work is done.
Your 45-minute nightly email chore becomes 5 minutes.
Notes to teachers, meal planning, appointment scheduling — all falling through the cracks.
Homework help at 9pm. Meal plans on demand. Nothing forgotten.
AI could help, but ChatGPT is confusing and nobody's offering to set it up.
If you can send a Telegram message, you can use this.
Therapists, lawyers, financial advisors — your data cannot live on someone else's servers.
Every word stays on hardware in your building. Period.
Real estate agents, coaches, consultants — you need help but can't afford to hire someone.
A personal assistant for $75/month that never calls in sick.
Castellan vs. The Rest
| AI Subscriptions | Castellan | |
|---|---|---|
| Knows you | Remembers you — on their servers, under their terms. | Configured around your life on day one. Memory stays on your device. |
| Your data | Stored up to 5 years. Trains models by default. | On a device in your home or office. Never transmitted. Never trains anything. |
| Security | Trust their infrastructure and changing policies. | Zero inbound ports. Per-device keys. Encrypted at rest. |
| Setup | Figure it out yourself. | Done for you. Personal consult. Handed over working. |
| Maintenance | You're on your own. | Monthly maintenance included. |
| Price | $20–200/mo. No setup help. | $300 setup + $75/mo. White-glove service. |
| Ownership | You're a subscriber. | Hardware & config are yours outright. |
ChatGPT is a gym membership.
Castellan is a personal trainer who shows up at your house.
Pricing
$300
One-Time Setup
$75
Per Month — Ongoing
AI API costs (typically $5–20/month) are billed directly to your own account — not bundled into our fee. You control the spending limit.
The Process
01
We learn your workflows, your tools, and exactly how you want your agent to behave. One conversation, zero jargon.
02
We configure your agent, set the rules, and connect it to your Telegram. Built to your exact spec — then reviewed by a second AI before it touches your hands.
03
Zero inbound ports. Spending caps. Encrypted keys. Dual-model QA. Nothing goes live with open issues.
04
Monthly maintenance, model updates, and ongoing tuning. Your agent gets smarter as your needs evolve.
Who We Are
Founder & Lead Technician
Controlled environment agriculture. Hydroponic production systems. Vocational training programs for adults with disabilities. The through-line has always been the same: take something powerful, strip away the barriers, and put it in the hands of people who need it.
AI is the most powerful tool most people can't use properly. Castellan exists to change that — one install at a time.
Infrastructure
25 years building and securing enterprise networks at organizations where downtime isn't an option and security isn't negotiable. The same discipline that protected trading floors and newsrooms now protects your personal AI agent.
Robert owns Castellan's infrastructure — the forks, the version control, the network architecture. If Austin builds the agent, Robert makes sure nobody can touch it.
Get Started
Personal intelligence, properly kept.