GrapesJS vs Silex: an engine to embed or an application to host

Two layers of the same stack

Silex is what you get when someone takes the GrapesJS engine and builds the application nobody hands you: a workspace, storage connectors, a publication step, and an interface aimed at people rather than developers.

That makes the comparison unusually clean. The editing experience is largely shared. What differs is everything around it, plus the licence.

Choose Silex when

You want a finished builder to run. Agencies, non-profits and small teams who need a website builder rather than a component to integrate.

Free software governance matters to you. Silex Labs is a non-profit, there is no contributor licence agreement, and the dual licensing is structured to keep it free. For organisations that have been through a licence change elsewhere, this is substantive.

Static publishing fits your workflow. Output goes to a host or a repository, so sites are cheap to serve and portable.

You do not want to build an application. The 480 hours our calculator attaches to a GrapesJS build is largely what Silex already is.

Choose GrapesJS when

The editor goes inside your product. Silex is not designed for that, and the licence complicates it further.

You need a permissive licence. BSD-3-Clause against GPL-3.0 or MPL-2.0 is the difference between "ship it however you like" and "ask your lawyer".

You want to control the interface. Silex's application shell is the product; changing it is modifying a product rather than configuring a library.

You need commercial support options. A non-profit project is the wrong procurement shape for teams that require a contractual response time.

The licence question in practical terms

BSD-3-Clause imposes attribution and nothing else. You can build a closed commercial product on GrapesJS, resell it, and never publish a line.

GPL-3.0 imposes reciprocal obligations that depend on how you distribute. MPL-2.0 is file-level copyleft and more permissive in practice. Dual licensing means you may choose, which softens the issue considerably — but "we chose MPL" is still a decision your legal team should make rather than your architect.

For an internal tool or an agency using Silex to produce client sites, none of this is likely to bite. For a SaaS product built on it, get advice first.

Migration

Because Silex is built on GrapesJS, exported sites are HTML and CSS, and moving from Silex to a custom GrapesJS build means keeping the output and rebuilding the application layer. That is substantial work, but it is not a content migration.

Verdict

Silex if you want a free, well-governed website builder to run and use. GrapesJS if you are building a product and the editor is a component of it. The two are not competitors so much as adjacent floors of the same building — and if what you want is the Silex experience with commercial support and a permissive licence, Studio SDK is the third option, with the funding disclosure that page carries.

Decision checklist

1. Are we building a product or using a tool? Building means the engine; using means the application.
2. Has our legal team reviewed GPL-3.0 and MPL-2.0? Do this before the architecture decision, not after.
3. Do we need commercial support with a response time? A non-profit project is the wrong procurement shape for that.
4. Who hosts it? Silex is an application you run; GrapesJS is a library you embed in something you already run.
5. Is publication to a host or repository our workflow? That is Silex's design centre, and rebuilding it on the engine is real work.

The number that matters

Two licences against one. GrapesJS's BSD-3-Clause asks for attribution and nothing else; Silex's dual GPL-3.0 or MPL-2.0 gives you a choice that your lawyers rather than your architects should make. For an internal tool it will not bite. For a commercial product built on top, get advice before you write code.