How it all fits
The whole system, at a glance.
The author creates. SESY.AI powers. NEO Library opens knowledge to everyone. Contributions, clients and the shop keep it alive.
The name is the method
SE is everything. Everything is SESY.
Six SE's, one system: semantic first, built with AI, run by seniors, made to reach your goals.
SEmantic
Library science for your business: we order who you are, what you offer and where, so people, Google and AI understand you.
SEnior
30+ years of engineering and strategy behind every system we launch.
SEll
Systems to sell your products, services and activities, with checkout, booking and WhatsApp built in.
SEO
Promote your image: found on Google, Maps and the answers of AI assistants.
SErver
Fast, secure hosting we run ourselves — no third-party lock-in.
SErvice
Real people, in your language, one WhatsApp away.
SE+SY=Sesy.AISemantic · Systems · AI
For every project
Library science for your business.
You don't need to be academic, quite the opposite. We order what you do so people and machines find you, trust you and choose you.
Culture, art & projects
Collections and causes, ordered like a library. Our own: NEO Library.
30+Years building systems
$0Setup & monthly fees
5.5%Only when you sell
4Languages of the Americas
NEO LibraryNEO Library, the new library for the new civilization, is the life's work of our founder, Librarian Joséf Sánchez Coach. SESY.AI is the semantic technology that powers it, and every client helps fund it.
Visit NEO Library ↗
- 01
Onboarding
Two minutes of taps: what you sell, your goals and the site you dream of.
- 02
Google Meet interview
15 minutes face to face to verify your business and accredit you for the free program.
- 03
Sell System
Senior work begins: we build your landing page, you approve it and you sell. 5.5% only when you sell.
Your landing page
One page built to sell: your offer, your products and one clear button.
Hosting & SSL
Fast and secure, with your free yourbusiness.sesy.ai address.
SEO & semantic data
Ready for Google, Maps and AI assistants from day one.
Analytics
Visits, clicks and sales — measured with GA4, not guessed.
WhatsApp built in
Customers reach you in one tap from every page.
Checkout & booking
Sell and take reservations. 5.5% only per completed sale.
Always free
- One landing page on a tested template
- Free subdomain (yourbusiness.sesy.ai), hosting and SSL
- Base SEO, Google Maps and semantic data
- GA4 analytics
- Your products with WhatsApp, checkout and booking
- Updates and maintenance, on our schedule
Optional add-ons (paid)
- Your own domain (.com, .mx…): annual fee by extension — or connect the one you already have
- Extra pages and multi-page sites
- Changes on demand and custom design
- Google Merchant, ads, social media and AI agents
- Consulting and training
You only pay 5.5% when you sell through SESY.
Do the math
Others charge you to exist. We earn only when you sell.
A typical websiteSESY · Free forever
To get startedDesign fee upfront$0
Every monthHosting, plugins, upkeep$0
A month with no salesYou still pay$0
A month with salesThe same fees5.5% of what you sell
Radical transparency
We only win when you win.
No fees, no subscriptions, no lock-in. A flat 5.5% on sales processed through SESY checkout and booking. Sell outside SESY? You pay nothing.
5.5%per completed sale through SESY
$5,000 USD
SESY earns$275 USD
You keep$4,725 USD
Setup: $0. Monthly fee: $0. Sell nothing, pay nothing. Payment processor fees are separate.
- 01
Accredited members only
Every application is verified by a person in a 15-minute video call. No anonymous sign-ups.
- 02
One landing per business
A tested template, updated on our schedule. Extra pages and on-demand changes are paid add-ons.
- 03
5.5% only through SESY
The fee applies only to sales processed by SESY checkout and booking.
- 04
Active operation
Dormant or abandoned sites can be revoked. Free is for businesses that operate.
Free forever is for accredited members and subject to our Terms & Conditions · Privacy Policy
Who is behind SESY
Joséf Sánchez Coach
Librarian · Founder & creator of SESY.AI · Author of NEO Library
30+ years building software, infrastructure and digital growth for tourism, retail, real estate, education, culture and professional services — as engineer, systems architect, DevOps and technical lead.
Why semantic systems? Because a business that people and machines cannot understand is invisible. Library science orders it, AI multiplies it and senior experience makes it sell. That's the system I give you, from hotels and restaurants to shops, services and cultural projects.
30+ yearsSystems architectMSc · UNAMEN · ES · FR · PT
TulumQuintana Roo · México
Mexico CityCDMX · México
North American · nearshoreYour time zone, your language, senior talent — at Latin American cost.
Questions, answered
Straight answers.
Is it really free forever?
Yes. Accredited members get one landing page on a free sesy.ai subdomain, with hosting, SSL, base SEO, analytics, WhatsApp, checkout and booking at zero cost. No setup fee, no monthly fee, no credit card — as long as you follow our Terms.
How does SESY make money?
A flat 5.5% on sales processed through SESY checkout and booking, plus optional add-ons. If you don't sell through SESY, you don't pay.
What does accredited mean?
You run a real business and complete a 15-minute Google Meet interview where we verify who you are and that you're a fit for the free program.
Can I change my page whenever I want?
Your free page uses a tested template and is updated on our schedule. It stays one page. Extra pages and on-demand changes are paid add-ons.
Who pays for advertising?
You do, directly to the ad platform. Ad management is an optional add-on.
Which countries do you serve?
All of the Americas, in English, Spanish, French and Portuguese, from our offices in Tulum and Mexico City.
Can I use my own domain?
Yes — it is the first step to grow. Your free page lives at yourbusiness.sesy.ai. Your own domain is a paid add-on: we register a new one for an annual fee that depends on the extension (.com, .mx…), or we connect the domain you already own by pointing its DNS to SESY.