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Photography · head to head

darktable vs Sigil

darktable logo

darktable

Photography

Free open-source RAW photo editor and digital darkroom

From
Free
Rated
-
Full reviewWebsite
Sigil logo

Sigil

Publishing

Open source EPUB editor for working directly on the file, not generating it

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: darktable open-source with no vendor pricing: Darktable is released under GPL 3.0; no cost or licensing applies; Sigil it produces no print output whatever, so any book that needs a paperback interior requires a completely separate tool and a second workflow.
  • They diverge on capability: darktable covers Non-destructive RAW editing, Sigil covers Direct EPUB editing.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which darktable and Sigil actually diverge.

Attributes where darktable and Sigil differ
AttributedarktableSigil
Pricing modelfreeOpen source, no licence fee
Platformswindows, mac, linuxWindows, macOS, Linux
CategoryPhotographyPublishing

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 darktable

  • Non-destructive RAW editing
  • Virtual lighttable
  • Wide camera RAW support
  • Tethered shooting
  • Color management and modules

Only in Sigil

  • Direct EPUB editing
  • Code and preview views
  • EPUB 2 and EPUB 3
  • Regex across files
  • Validation
  • Python plugins

What people use each for

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

darktable

  • Processing RAW photos without paying for a subscription editornot Sigil
  • Organizing and cataloging large personal photo librariesnot Sigil
  • Tethered shooting directly into an editing workflownot Sigil
  • Applying non-destructive edits that preserve the original RAW filenot Sigil

Sigil

  • Fixing an EPUB that a retailer validator has rejected, without re-exporting from the tool that generated itnot darktable
  • Correcting the table of contents, reading order or metadata in a file supplied by a conversion servicenot darktable
  • Preparing a back-catalogue title where the only surviving source is the EPUB itselfnot darktable
  • Applying a consistent stylesheet or a bulk text correction across every chapter of a book at oncenot darktable

Where each one falls short

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

darktable

  • Open-source with no vendor pricing: Darktable is released under GPL 3.0; no cost or licensing applies
  • Self-hosted photography workflow: customers bear full responsibility for hosting, maintenance, and support outside community
  • No commercial support model published: community-driven project with mailing lists and forums only; no commercial SaaS alternative
  • Community contribution required for feature development: no vendor roadmap for prioritized feature work; community volunteers drive development

Sigil

  • It produces no print output whatever, so any book that needs a paperback interior requires a completely separate tool and a second workflow.
  • Meaningful use requires reading and writing HTML and CSS, which puts it out of reach of most authors who simply want a finished file.
  • There is no cloud storage, sync or collaboration, so the book exists as a file on one machine and version control is whatever you set up yourself.
  • Development depends on a small number of volunteer maintainers, so release timing and platform builds follow their availability rather than a roadmap, and a lapse in maintenance would leave no obvious successor.
  • It provides no distribution, no retailer connection and no Kindle-native output, so it sits in the middle of a workflow that other tools have to complete on both sides.

Pricing, plan by plan

darktable

Free
  • FreeFree
    • Full RAW editing and lighttable features
    • Open-source under GNU GPL v3
    • No account or subscription required

Sigil

Free
  • SigilFree
    • GPL licensed with no cost or account required
    • Full functionality with no feature gating
    • Community support through forums and the issue tracker

Which should you pick?

Choose darktable if

  • You need non-destructive raw editing.
  • You want to start without paying.
  • You work on windows, mac, linux.
  • You also want virtual lighttable.
darktable review

Choose Sigil if

  • You need direct epub editing.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want code and preview views.
Sigil review

Questions people ask

Is darktable or Sigil better?
Neither clearly leads. darktable starts at Free and Sigil at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, darktable or Sigil?
darktable starts at Free and Sigil at Free.
Does darktable or Sigil run on more platforms?
darktable runs on windows, mac, linux. Sigil runs on Windows, macOS, Linux.
Can I use darktable for free?
Both have a free tier, so you can try either at no cost before committing.
What is darktable best used for?
darktable is most often used for processing raw photos without paying for a subscription editor, organizing and cataloging large personal photo libraries, tethered shooting directly into an editing workflow, applying non-destructive edits that preserve the original raw file. Of those, processing raw photos without paying for a subscription editor and organizing and cataloging large personal photo libraries are not what Sigil is typically brought in for.
What can darktable do that Sigil cannot?
darktable covers Non-destructive RAW editing, Virtual lighttable, Wide camera RAW support, Tethered shooting. Sigil covers Direct EPUB editing, Code and preview views, EPUB 2 and EPUB 3, Regex across files.

Answered from the vendors’ own pages

darktable: How much does Darktable cost?

Darktable is free and open-source under the GPL 3.0 license. There are no licensing fees, subscription costs, or commercial restrictions.

Source
Sigil: Can I write my book in Sigil?

You can, but you should not. It is an EPUB editor, not a word processor, and writing long-form prose in it is unpleasant. Write elsewhere, import, then finish in Sigil.

darktable: Is Darktable created by a commercial vendor?

No. Darktable is a community-driven open-source project 'created for photographers, by photographers.' It has no commercial vendor or SaaS model.

Source
Sigil: Does it make Kindle files?

Not natively. Produce a valid EPUB in Sigil and let Amazon convert it, or use a separate conversion tool for other Kindle formats.

darktable: How can I get support for Darktable?

Darktable is supported through community channels including mailing lists and forums. There is no commercial support option published on the website.

Source
Sigil: Is it safe to rely on a volunteer project for commercial work?

The files it produces are standard EPUB, so nothing is locked in. The risk is that maintenance stops, not that your books become unreadable.

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