What is a No-Build Headless CMS?

It is an architecture that offers the speed of a Headless stack without the complexity of build tools. RealMosaic uses a Just-In-Time (JIT) Asset Compiler to compile and cache-bust assets instantly on the server.

How does RealMosaic ensure 100/100 Lighthouse scores?

The engine uses a native Purger to scan site content and remove up to 88% of unused CSS bloat. This process is non-destructive, utilizing Shadow Swap technology to maintain original assets while serving optimized versions.

Can clients break the site design during editing?

No. RealMosaic utilizes a Sealed Engine logic where content is managed within defined design boundaries. By removing code execution from the template layer, design integrity is structurally protected.

What development tools are included in the Workspace?

The platform features a cloud-native IDE powered by Monaco (the engine behind VS Code), offering zero-latency development, live previews, and a native Git-style history with side-by-side diffing.

The agency platform for building and running client sites

RealMosaic is built for agencies managing multiple sites. Structured authoring, a designer friendly theme workspace, and performance first delivery.

Book a demo Why RealMosaic

View pricing | Theme workspace | Security overview

Real-world Performance

Subtle Difference Relaunch

100 Performance

RealMosaic performance audit showing 100/100 Lighthouse score

FCP

0.3s

LCP

0.5s

TBT

0ms

CLS

0

Verify live PageSpeed results

Built for agency reality

Expert governance for high-leverage digital estates.

Integrated Headless

The No-Build Headless CMS

RealMosaic delivers the blistering performance of Headless architecture without the fragile build pipelines. Our Just-In-Time (JIT) Asset Compiler runs natively on the server. You edit, you save, and we compile and cache-bust instantly.

Zero-Config Architecture

Deterministic Rendering

Guided Content Autonomy

Enable clients to manage their own narrative within the safety of defined design boundaries. RealMosaic allows for flexible content editing while ensuring the underlying design system remains protected and visually consistent.

By separating the content layer from the core layout, agencies can grant editing permissions with confidence, knowing that the "Web Craft" and brand integrity will stay exactly as intended.

Native Creative Primitives

Articles, Galleries, Forms, and Events are deep-integrated "First-Class Citizens" of the CMS. These aren't third-party add-ons; they are built-in features designed to work in perfect harmony with your theme.

With 95% of typical project needs covered natively, you can spend less time configuring plugins and more time on high-end design and performance.

Performance as a Baseline

RealMosaic delivers 100/100 Lighthouse scores through a JIT Asset Compiler that surgically removes unused CSS. Instantly reduce bloat by up to 88% with zero effort.

Shadow Swap Technology

Self-Healing Asset Revert

Optimisation Complete: 226KB → 49KB

The Governance Workflow

A streamlined path from design to a managed digital estate.

01 - Provision

Fleet Setup

Deploy instances on your branded Base URL with one-click orchestration and hard-walled isolation.

02 - Standardize

Lock Formats

Define authoritative templates using common-sense conditionals and declarative syntax.

03 - Launch

Optimize

Activate Performance Mode to surgically remove unused CSS and assets for a 100/100 baseline.

04 - Govern

Scale Clarity

Manage site density predictably using the Capacity Unit model as your agency portfolio grows.