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Publishing · head to head

Pressbooks vs Stable Diffusion

Pressbooks logo

Pressbooks

Publishing

Open source book production built on WordPress, and the default tool for open textbooks

From
Free
Rated
-
Full reviewWebsite
Stable Diffusion logo

Stable Diffusion

AI

Open-source AI image generation

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Pressbooks self-hosting is free in licence terms only; it requires WordPress multisite administration, upgrades and backups, which is a real staff cost most institutions underestimate.; Stable Diffusion generated images have lower resolution and quality at non-standard dimensions
  • They diverge on capability: Pressbooks covers Single source, three outputs, Stable Diffusion covers Text-to-image.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Pressbooks and Stable Diffusion actually diverge.

Attributes where Pressbooks and Stable Diffusion differ
AttributePressbooksStable Diffusion
Pricing modelOpen source, no licence feeUnknown
PlatformsWeb, Self-hostedWeb, Local (GPU-based), Cloud APIs
CategoryPublishingAI
FoundedUnknown2019

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Pressbooks

  • Single source, three outputs
  • Cloning and adaptation
  • H5P interactive content
  • LMS integration
  • Open source under the GPL
  • Accessibility tooling

Only in Stable Diffusion

  • Text-to-image
  • Image-to-image
  • Inpainting
  • LoRA support
  • ComfyUI
  • Automatic1111
  • Multiple UIs
  • Local support

What people use each for

The jobs each tool is most often brought in to do.

Pressbooks

  • A university library replacing a commercial textbook by adapting an existing open textbook rather than commissioning a new onenot Stable Diffusion
  • A course team that wants readings delivered inside Canvas or Moodle with embedded exercises rather than as a static PDFnot Stable Diffusion
  • A research institute publishing reports that must exist as a web page, an EPUB and a printable document without maintaining three filesnot Stable Diffusion
  • A consortium standardising open textbook production across several institutions with a shared catalogue of adaptable titlesnot Stable Diffusion

Stable Diffusion

  • ai tools managementnot Pressbooks
  • Workflow automationnot Pressbooks
  • Reportingnot Pressbooks

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Pressbooks

  • Self-hosting is free in licence terms only; it requires WordPress multisite administration, upgrades and backups, which is a real staff cost most institutions underestimate.
  • Professional print PDF output depends on a commercial rendering engine that is licensed separately, so the genuinely free self-hosted route produces web and EPUB output but not press-quality print.
  • Design control is limited to the supplied themes unless someone writes custom CSS, so books tend to look recognisably like Pressbooks books.
  • There is no distribution, no ISBN service and no retail channel, so it produces files and web pages but plays no part in selling anything.
  • The editing experience inherits WordPress conventions, and authors working on long or heavily structured manuscripts find it slower than a dedicated writing application.

Stable Diffusion

  • Generated images have lower resolution and quality at non-standard dimensions
  • Struggles with complex multi-object prompts and text generation
  • Poor rendering of human hands, limbs, and faces due to training data limitations
  • Trained primarily on English-language descriptions, reinforcing Western cultural bias
  • Requires significant GPU computational resources for local deployment

Pricing, plan by plan

Pressbooks

Free
  • PressbooksFree
    • GPL licensed, self-hostable with no software fee
    • WordPress multisite administration is your responsibility
    • Print PDF export depends on a separately licensed rendering engine

Stable Diffusion

Free

No published plan breakdown. See the Stable Diffusion review.

Which should you pick?

Choose Pressbooks if

  • You need single source, three outputs.
  • You want to start without paying.
  • You work on Web, Self-hosted.
  • You also want cloning and adaptation.
Pressbooks review

Choose Stable Diffusion if

  • You need text-to-image.
  • You want to start without paying.
  • You work on Web, Local (GPU-based), Cloud APIs.
  • You also want image-to-image.
Stable Diffusion review

Questions people ask

Is Pressbooks or Stable Diffusion better?
Neither clearly leads. Pressbooks starts at Free and Stable Diffusion at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Pressbooks or Stable Diffusion?
Pressbooks starts at Free and Stable Diffusion at Free.
Does Pressbooks or Stable Diffusion run on more platforms?
Pressbooks runs on Web, Self-hosted. Stable Diffusion runs on Web, Local (GPU-based), Cloud APIs.
Can I use Pressbooks for free?
Both have a free tier, so you can try either at no cost before committing.
What is Pressbooks best used for?
Pressbooks is most often used for a university library replacing a commercial textbook by adapting an existing open textbook rather than commissioning a new one, a course team that wants readings delivered inside canvas or moodle with embedded exercises rather than as a static pdf, a research institute publishing reports that must exist as a web page, an epub and a printable document without maintaining three files, a consortium standardising open textbook production across several institutions with a shared catalogue of adaptable titles. Of those, a university library replacing a commercial textbook by adapting an existing open textbook rather than commissioning a new one and a course team that wants readings delivered inside canvas or moodle with embedded exercises rather than as a static pdf are not what Stable Diffusion is typically brought in for.
What can Pressbooks do that Stable Diffusion cannot?
Pressbooks covers Single source, three outputs, Cloning and adaptation, H5P interactive content, LMS integration. Stable Diffusion covers Text-to-image, Image-to-image, Inpainting, LoRA support.

Answered from the vendors’ own pages

Pressbooks: Is Pressbooks really free?

The software is GPL licensed and free to self-host. The hosted service is priced, and professional print PDF output requires a commercially licensed renderer, so budget accordingly.

Stable Diffusion: Is Stable Diffusion truly free and open-source?

Yes. Stable Diffusion is released under the CreativeML Open RAIL-M license, allowing free use for both commercial and non-commercial purposes, and the code is open-source on GitHub.

Source
Pressbooks: Can I sell a book made in Pressbooks?

You can sell the EPUB or the printed book through any distributor, but Pressbooks itself provides no ISBN, no storefront and no distribution.

Stable Diffusion: Can I use Stable Diffusion commercially for free?

Yes, if your organization has less than $1M annual revenue. Organizations exceeding $1M annually must obtain an Enterprise License from Stability AI.

Source
Pressbooks: Why do universities use it for open textbooks?

Because an openly licensed book can be cloned into another institution network and adapted for a different course, which turns a finished textbook into a starting point rather than a fixed artefact.

Stable Diffusion: What are Stable Diffusion's image resolution limitations?

The base model was trained on 512x512 pixel images, and image quality degrades noticeably when deviating from this resolution. Newer models like SDXL support higher resolutions.

Source
Stable Diffusion: Can I run Stable Diffusion locally on my computer?

Yes. Stable Diffusion is open-source and can run locally on compatible hardware, though it requires a GPU for reasonable performance.

Source
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