A code-first tool for newsletters

The CMS for
Newsletters

Celaro turns newsletter creation into a CMS experience with code-based blocks, edited in a simple admin interface.

Code-First
For Developers

With Celaro, you define your newsletter blocks in code. All fields are typed and validated, so you can be sure your newsletter will look great every time.

Typed blocks
Define structure in code with full type safety and validation before send.
Reusable content
Ship consistent layouts while editors work from shared block libraries.
One source of truth
Update blocks once; every campaign inherits the same behavior and styling.

Content-First
For Marketers

All blocks are built in code, while the newsletters are composed in the admin so that marketers can focus on content, not code.

Visual editing
Arrange and tune content in a focused admin, without touching markup or deploys.
Content-led workflow
Write copy and fill block fields; structure and safety stay defined in the codebase.
Consistent quality
Reusable blocks keep layouts on-brand and reduce last-minute design surprises.

Bring back the control.
Get early access

Work with your favorite tools

The CMS forNewsletters

Code-FirstFor Developers

Typed blocks

Reusable content

One source of truth

Content-FirstFor Marketers

Visual editing

Content-led workflow

Consistent quality

Bring back the control.Get early access

The CMS for
Newsletters

Code-First
For Developers

Content-First
For Marketers

Bring back the control.
Get early access