No need to login or sign up
Start from the place you already work: your inbox.
Your Website. One Email.
Casso is an AI agent that builds and maintains websites entirely through email.
You're in.
Check your inbox for next steps from Casso.
No login. No signup. Free hosting on a .bycasso.com address for as long as you want it.
Prefer a screen to an inbox? Build it in your browser — same agent, same free hosting, and you watch the site appear as it is made. That one does need an email address and a password.
Meet Casso
Hi, I'm Casso
An email-based AI agent to build, deploy and maintain your websites.
No login
No signup
Fast static hosting
Email-based updates
Human backup
Benefits
Benefits of using me.
Update your website from your phone
Send edits by email whenever you notice something that should change.
Fast website load times
Sites are published as lightweight static pages designed to load quickly.
Human support when I can't do it
If a request needs capabilities outside the agent, Casso can route the conversation for human follow-up.
Connect yours free, or we buy you one
Already own a domain? We connect it for free. Do not own one? On the $96 a year plan we buy and register it for you.
SEO optimized structure
Pages can include clear titles, headings, metadata, internal links, and readable content structure.
Not just pages
Your website can actually do things.
Most AI website tools hand you a brochure: text and pictures that never change and never react. Ask Casso for any of these and it builds the working version, wired up, on the free plan. The $96 a year plan raises the limits; it does not unlock the features.
A contact form that emails you
Someone fills it in on your site and the message arrives in your inbox, with their reply address on it. Nothing to check, nothing to log into.
A private inbox only you can open
Booking requests, orders, applications and sign-ups are stored on your site’s own database. Visitors can add to it; reading it needs your key. Casso builds the page you read them on.
Change prices and hours yourself
Menus, price lists, opening hours, fixtures, listings — Casso can put them behind an admin page that asks for your key and saves your edits straight to the live site. No rebuild, and no waiting on us.
People can sign up and log in
Real accounts, with the password checked on our server and never in the page. Each person sees only their own data — their orders, their bookings, their saved notes — and you see everyone’s. That is a members’ area or a client portal, not a brochure. Forgotten passwords reset themselves by email, so you are not the help desk.
Your site can call an API you pay for
If you already have an account somewhere — an AI model, a weather feed, a lookup service — your site can use it on your account. You enter the key through a one-time link; Casso never sees it and it is never written into the page.
Honest about the limits: Casso cannot take card payments on your site, and visitors cannot upload files. If you ask for one of those it will say so rather than build something that looks like it works.
Free Casso hosting
Websites can stay live on a .bycasso.com domain indefinitely at no cost.
Your own domain, connected free
Already own a domain name? Send it over and we connect it at no cost. If you do not own one yet, the $96 a year plan buys and registers it for you.
Plain-language edits
Ask for copy, layout, image, page, and navigation updates in normal email language.
Hosting + domains
Free to publish, and free on a domain you already own.
Use a free Casso subdomain for as long as you want, and if you already own yourbusiness.com we will connect it for free, certificate included. The $96 a year plan is for when you do not own a domain yet and want us to buy and register one for you.
Start here
Give Casso an inbox to reply to.
Click through to the get-started page, enter your email, and check your inbox for next steps.