Square21 CMS

A CMS shaped to your website — not the other way around.

Block-based editing in your design language, multi-site and multi-language, forms, media and SEO — custom-built to your site’s exact needs, on infrastructure we operate.

What you get

Your design system, editable.

Editors work with blocks that already look like your brand — and we run the infrastructure underneath.

Block editor in your design

Pages composed from blocks matched to your design system — nothing off-grid, nothing broken.

Multi-site & multi-language

One admin for every site and locale — content shared where it should be, separate where it must be.

Forms & leads

Build forms without a developer; submissions land where your team already works.

Media library

Central assets with focal-point crops and automatic optimisation.

SEO tools

Metadata, redirects, sitemaps and previews — built in, not bolted on.

Operated by us

Monitoring, backups, updates on infrastructure we run — SLA-backed.

Editing that can’t break the design

Every block is built from your design system, so editors compose freely and the result always looks intentional — on any screen size.

  • Blocks matched to your brand
  • Live preview while editing
  • Safe drafts and scheduled publishing

Every site, every language, one admin

Run one brand site or a whole group of them — shared components, per-site content, per-locale copy, all from a single login.

  • Multi-site from one admin
  • Full multi-language content
  • Shared design, local control

Run by the people who built it

We operate the CMS on our own infrastructure: monitoring, backups, zero-downtime updates — and someone who picks up the phone.

  • SLA-backed operations
  • Automatic backups
  • Zero-downtime updates
Next step

See your website in the editor.

One conversation is enough to tell whether we’re the right partner.

Square21 CMS — A CMS shaped to your website — not the other way around.