Building a drag-and-drop landing page builder into your SaaS

This is a product feature, not an editor

The mistake that sinks these projects is scoping them as "add a page builder". What you are actually shipping is a multi-tenant publishing product, and the editor is one component of it.

The full scope, at minimum:

• an editor your customers can use without training;
• a block library that reflects what your customers sell;
• asset upload with per-tenant quotas;
• draft and published states with a preview;
• publishing to a URL, and eventually to a custom domain;
• permissions so one tenant cannot open another's page;
• an analytics story, because customers will ask on day two.

Our build-versus-buy calculator puts the engineering at around 520 hours before custom domains, which are their own project.

Decision one: how much styling freedom

This decision shapes everything else, and it is a product decision rather than a technical one.

Constrained — users choose components and fill in props. Pages stay on brand, support load is low, and the editor is simple. Puck implements this model natively.

Free-form — users change spacing, colour and typography. Customers ask for this constantly, and it produces pages that look worse and generate more tickets. GrapesJS is the engine that supports it properly, with a style manager that writes CSS.

Most successful in-product builders are more constrained than their customers initially wanted. Pick deliberately, and expect to defend the choice.

Decision two: where published pages live

Rendered by your app. Simplest: a route that fetches page data and renders it. Works well with Puck, keeps everything in one deployment, and means your app's availability is the page's availability.

Static HTML on object storage. Publish generates HTML and uploads it; a CDN serves it. Fast, cheap, resilient, and it fits GrapesJS's output naturally.

Custom domains. What customers ask for once they are serious. Certificate automation, DNS validation and routing per tenant — plan a month, not a sprint.

Decision three: who owns templates

Customers start from templates or they abandon the feature. Someone has to build them, keep them current and make them look like the customer's brand rather than yours.

Three routes: build a starter set yourself (a week per template done properly), buy a template library for your engine, or let customers save their own pages as templates — which is the cheapest and only works once you have customers producing good pages.

A sequencing that works

1. Spike the editor with three real blocks from your own product, not a generic hero.
2. Put it in front of one customer. Interaction assumptions are where these projects fail, and one session tells you more than a month of internal review.
3. Build persistence and preview before adding more blocks.
4. Then assets, then permissions. Both are harder to retrofit than to build.
5. Custom domains last, and only when customers ask with money attached.

What to read next

Puck vs GrapesJS is the library decision in detail; white-label builders covers the case where your customers are agencies with their own clients; and the build-versus-buy calculator puts a number on the whole thing before you commit a quarter to it.