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Publishing · head to head

Kobo vs Sigil

Kobo logo

Kobo

Publishing

Rakuten e-reader hardware, app and ebook store, the reader-facing side of the Kobo ecosystem

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: Kobo the overall ebook and audiobook catalogue, especially exclusive or first-run titles, is smaller than Amazon can offer through Kindle and Audible.; 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: Kobo covers E-ink devices, Sigil covers Direct EPUB editing.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Kobo and Sigil actually diverge.

Attributes where Kobo and Sigil differ
AttributeKoboSigil
Pricing modelFree store and app; hardware sold separately; optional subscriptionOpen source, no licence fee
PlatformsiOS, Android, Web, Kobo e-readersWindows, macOS, Linux

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

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 Kobo

  • E-ink devices
  • EPUB support
  • Built-in Libby integration
  • Kobo Plus
  • Kobo Store
  • Note-taking models

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.

Kobo

  • A reader who wants dedicated e-ink hardware instead of reading on a backlit phone or tabletnot Sigil
  • Someone who borrows heavily from a public library and wants OverDrive integration built directly into the devicenot Sigil
  • A reader outside the Amazon ecosystem who wants an open EPUB-based alternative to Kindlenot Sigil
  • Someone who wants the option of both buying individual ebooks and an unlimited subscription from one storenot Sigil

Sigil

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

Where each one falls short

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

Kobo

  • The overall ebook and audiobook catalogue, especially exclusive or first-run titles, is smaller than Amazon can offer through Kindle and Audible.
  • Kobo Plus, the unlimited subscription layer, is not available in every country the hardware and store otherwise serve.
  • Hardware pricing for higher-end note-taking models runs into the several-hundred-dollar range, which is a real commitment against reading on a phone for free.
  • Software updates and app polish have historically lagged the Kindle app in some regions, particularly around syncing and highlighting features.
  • This is a distinct product from Kobo Writing Life, and readers looking for author or publishing tools need that separate platform, not this one.

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

Kobo

Free
  • Kobo app and storeFree
    • Free app and store, pay per ebook or audiobook
    • Hardware sold separately, from around $110 for entry e-readers
    • Full library of individual purchases
  • Kobo Plus$9.99/month
    • Unlimited access to a Kobo Plus catalogue
    • Available in supported countries only
    • Layered on top of the regular store

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 Kobo if

  • You need e-ink devices.
  • You want to start without paying.
  • You work on iOS, Android, Web, Kobo e-readers.
  • You also want epub support.
Kobo 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 Kobo or Sigil better?
Neither clearly leads. Kobo 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, Kobo or Sigil?
Kobo starts at Free and Sigil at Free.
Does Kobo or Sigil run on more platforms?
Kobo runs on iOS, Android, Web, Kobo e-readers. Sigil runs on Windows, macOS, Linux.
Can I use Kobo for free?
Both have a free tier, so you can try either at no cost before committing.
What is Kobo best used for?
Kobo is most often used for a reader who wants dedicated e-ink hardware instead of reading on a backlit phone or tablet, someone who borrows heavily from a public library and wants overdrive integration built directly into the device, a reader outside the amazon ecosystem who wants an open epub-based alternative to kindle, someone who wants the option of both buying individual ebooks and an unlimited subscription from one store. Of those, a reader who wants dedicated e-ink hardware instead of reading on a backlit phone or tablet and someone who borrows heavily from a public library and wants overdrive integration built directly into the device are not what Sigil is typically brought in for.
What can Kobo do that Sigil cannot?
Kobo covers E-ink devices, EPUB support, Built-in Libby integration, Kobo Plus. Sigil covers Direct EPUB editing, Code and preview views, EPUB 2 and EPUB 3, Regex across files.

Answered from the vendors’ own pages

Kobo: Is this the same as Kobo Writing Life?

No, Kobo Writing Life is the separate self-publishing platform for authors; this entry is the consumer reading app, store and hardware.

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.

Kobo: Can I borrow library books on a Kobo device?

Yes, many Kobo devices have built-in OverDrive/Libby integration for direct library borrowing.

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.

Kobo: Do I need a subscription to use Kobo?

No, you can buy ebooks and audiobooks individually; Kobo Plus is an optional unlimited add-on where available.

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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