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Mattrbld

mattrbld.com

Free plan WebiOSAndroidSelf-hosted
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Spec score 7.8 #15 of 23 in Git-Based CMS

What it is

Mattrbld is a Git-based headless CMS for creating and managing content without tying editors to a particular frontend framework. Content remains in Git repositories rather than on Mattrbld’s external servers. After importing a project, users can edit offline, but must reconnect to publish changes. Schemas define content fields and validation rules, which Mattrbld uses to create editing forms. It supports JSON and Markdown files with YAML frontmatter; plain YAML support is planned but not implemented. Developers can implement a preview route using Mattrbld’s protocol to show content updates in real time. Repository communication uses Git; its documentation names GitLab, GitHub, and Bitbucket as providers that require a CORS proxy. Mattrbld does not require its own account, but collaborators need Git-provider accounts to access private repositories or sync. It is free, with an official hosted instance and a self-hosted core. The hosted instance has no availability guarantee, and its provided CORS proxy is intended for small-scale private projects. Mattrbld can also be built from source and hosted as a single-page application.

Spec sheet

Product
Mattrbld is a Git-based headless CMS for creating, editing, and managing content independently of a particular frontend framework.Read 5 Oct 2026 · mattrbld.com
Intended users
The maker describes it as suited to developers or agencies helping small to medium-sized clients manage website content, and says it is not a drag-and-drop website builder.Read 5 Oct 2026 · mattrbld.com
Authentication
Mattrbld does not require its own account, but collaborators need accounts with the Git provider and must authenticate to import private repositories or sync changes.Read 5 Oct 2026 · mattrbld.com
Automation
Mattrbld cannot schedule publishing because it only runs while a user is actively using it.Read 5 Oct 2026 · mattrbld.com
Content storage
Content lives in Git repositories and is not stored on Mattrbld’s external servers.Read 5 Oct 2026 · mattrbld.com
Credential handling
Mattrbld says it does not store passwords or access tokens, but credentials and repository requests pass through the configured CORS proxy when one is required.Read 5 Oct 2026 · mattrbld.com
Data modelling
Schemas define content fields and validation rules, and Mattrbld uses them to generate editing forms.Read 5 Oct 2026 · mattrbld.com
Git integrations
Mattrbld communicates with repositories using Git rather than proprietary provider APIs, and its documentation names GitLab, GitHub, and Bitbucket as providers requiring a CORS proxy.Read 5 Oct 2026 · mattrbld.com
Live previews
Developers can implement a preview route using Mattrbld’s protocol so editors can see content updates in real time.Read 5 Oct 2026 · mattrbld.com
Notable limitation
Mattrbld does not support Git LFS and is not suited to media-heavy projects or content containing large amounts of binary data.Read 5 Oct 2026 · mattrbld.com
Offline editing
After importing a project, users can create and edit content offline, but cannot publish changes until they reconnect.Read 5 Oct 2026 · mattrbld.com
Self-hosting
Mattrbld can be built from source and hosted as a single-page application on a hosting service of the user’s choice.Read 5 Oct 2026 · mattrbld.com
Supported content formats
Mattrbld supports JSON and Markdown files with YAML frontmatter; plain YAML support is planned but not implemented.Read 5 Oct 2026 · mattrbld.com

Plans and prices

Official hosted instance Free Free to try No guarantee for availability · Provided CORS proxy intended for small-scale private projects Read 5 Oct 2026 · mattrbld.com
Self-hosted core Free Free to use for self-hosting Open source under GNU AGPL · Core features Read 5 Oct 2026 · mattrbld.com

Every Mattrbld plan and price →

Strong points and limits

Strong points

  • Content stays in Git repositories
  • Offline editing after project import
  • Schemas generate forms with validation rules
  • Supports real-time previews through an implemented route

Limits

  • Publishing requires reconnecting after offline edits
  • Plain YAML support is not implemented
  • Hosted instance has no availability guarantee
  • Does not support Git LFS

Who it suits

Mattrbld suits developers or agencies helping small to medium-sized clients manage website content. It is not a drag-and-drop website builder.

Verdict

Mattrbld offers a free Git-centered editing workflow, with hosted and self-hosted options. Consider the proxy requirements and Git LFS limitation, especially for projects with substantial binary media.

Where Specifiction places it

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