People approve what matters.
Agents draft, sort and prepare. Sending, publishing, spending and deleting wait for a yes, in the dashboard, Slack, Telegram, Discord or email.
We build the team small companies can't hire.
Brainstack gives a small company a brain that knows its clients, prices and decisions, and AI agents that do the repetitive work in its own tools. People stay in charge of everything that leaves the company.
AI can do the work. Handing it over is the hard part.
A company of ten has the same jobs as a company of a hundred: invoices to chase, an inbox to sort, ads to watch, reports to send, clients to onboard. It just doesn't have the people.
The AI to do those jobs already exists, and most teams already pay for it. What's missing is a safe way to hand the work over: an assistant that knows your company, works in your tools, keeps your data on your own server and asks before it sends anything.
That's Brainstack. One agent at a time, each one earning its place.
A week at a 10-person company
Chase late invoicesEvery MondayAgent
Sort the inbox, draft repliesEvery morningAgent
Weekly report per clientEvery FridayAgent
Answer support from the docsAll dayAgent
Approve what leaves the companyWhenever it mattersYou
Clients, product, decisionsThe rest of the weekYour team
Founder
Yaye Cáceres
Founder. Product builder.
5+AI products built
5,200+creators on Hooked"I've shipped five AI products in two years, and the last ones I built with agents working next to me every day. That changed what one person can do. Customers don't buy AI. They buy outcomes. Brainstack is the setup I run my own companies on, made safe enough that a ten-person team can hand over real work on Monday."
Why Brainstack works this way.
Three decisions we made early, and won't trade away for a faster demo.
Your data, on your server.
Every company gets a private server only it uses, with encrypted backups every 6 hours. Not a shared database with everyone else's clients.
The AI you already pay for.
Brainstack runs on your company's Claude, ChatGPT or Gemini plan. No markup on your AI, and no lock-in to one provider.
How we work, in five rules.
People stay in charge
Nothing leaves your company without a visible yes from someone with the right to give it.
No number we can't prove
If we can't show where a figure comes from, it doesn't go on the site, in a deck or in an agent's answer.
Your data stays yours
One server per company, permissions per person, and you can take everything with you.
One agent at a time
We'd rather you hire one agent that works than ten you don't trust.
Plain words
If a new colleague wouldn't understand it, we rewrite it. That goes for the product, the prices and this page.
A small team, with a lot of agents.
Small on purpose. We run Brainstack on Brainstack: the people bring the judgment, our own agents take the repetitive work, and nothing ships without a yes.
YCYaye CáceresFounder
EngineerBuilds and fixes the product, and opens every change for review.
GrowthWrites for the blog, watches SEO and checks the ads every morning.
And four more agentsFinance keeps the books and invoices, content makes the videos, sales writes proposals and support answers customers.