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Productivity · head to head

LibreOffice vs Sigil

LibreOffice logo

LibreOffice

Productivity

Free and open-source office suite that runs entirely offline

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: LibreOffice real-time collaborative editing is far behind Microsoft 365 and Google Workspace, and for teams who co-edit this alone usually decides the question; 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: LibreOffice covers Full suite, Sigil covers Direct EPUB editing.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which LibreOffice and Sigil actually diverge.

Attributes where LibreOffice and Sigil differ
AttributeLibreOfficeSigil
CategoryProductivityPublishing

Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), platforms (Windows, macOS, Linux), 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 LibreOffice

  • Full suite
  • Works offline
  • OpenDocument native
  • Microsoft format support
  • No telemetry or AI
  • Extensions and macros

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.

LibreOffice

  • Organisations where documents cannot leave the premises for policy or statutory reasonsnot Sigil
  • Replacing per-seat office licences at scalenot Sigil
  • Long-term archives needing a format not defined by a single vendornot Sigil
  • Reviving older hardware that current commercial suites strainnot Sigil

Sigil

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

Where each one falls short

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

LibreOffice

  • Real-time collaborative editing is far behind Microsoft 365 and Google Workspace, and for teams who co-edit this alone usually decides the question
  • Mobile support is weak, which is disqualifying for a workforce that reviews documents on phones
  • Complex Microsoft Office documents still lose formatting in transit, so exchange-heavy workflows need testing with real files
  • Central policy management, conditional access and audit tooling are thin against the commercial suites
  • Advanced spreadsheet work is where the gap with Excel is widest, and it affects exactly the users least willing to change

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

LibreOffice

Free
  • LibreOfficeFree
    • Full suite
    • Commercial use permitted
    • No per-seat licence

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 LibreOffice if

  • You need full suite.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want works offline.
LibreOffice 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 LibreOffice or Sigil better?
Neither clearly leads. LibreOffice 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, LibreOffice or Sigil?
LibreOffice starts at Free and Sigil at Free.
Does LibreOffice or Sigil run on more platforms?
Both run on Windows, macOS, Linux, so platform support will not decide this one for you.
Can I use LibreOffice for free?
Both have a free tier, so you can try either at no cost before committing.
What is LibreOffice best used for?
LibreOffice is most often used for organisations where documents cannot leave the premises for policy or statutory reasons, replacing per-seat office licences at scale, long-term archives needing a format not defined by a single vendor, reviving older hardware that current commercial suites strain. Of those, organisations where documents cannot leave the premises for policy or statutory reasons and replacing per-seat office licences at scale are not what Sigil is typically brought in for.
What can LibreOffice do that Sigil cannot?
LibreOffice covers Full suite, Works offline, OpenDocument native, Microsoft format support. Sigil covers Direct EPUB editing, Code and preview views, EPUB 2 and EPUB 3, Regex across files.

Answered from the vendors’ own pages

LibreOffice: Is LibreOffice really free for business use?

Yes. It is open source with no per-seat licence and no restriction on commercial use. The Document Foundation is funded by donations and sponsors.

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.

LibreOffice: Does it have AI features?

No. The 26.8 release states it contains no generative AI, that documents are not transmitted to remote services, and that no component requires network access.

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.

LibreOffice: Can it open Microsoft Office files?

Yes, and save back to them. Round-tripping complex documents is imperfect between any two suites, so test with your own files before committing to an exchange-heavy workflow.

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.

LibreOffice: Why do governments use it?

Two reasons: no per-seat cost at scale, and OpenDocument is an ISO standard implemented by more than one vendor, which matters for archives that must stay readable after a vendor relationship ends.

LibreOffice: What is the biggest reason not to use it?

Collaborative editing. If several people work on the same document simultaneously, Microsoft 365 and Google Workspace are substantially better and that gap is not closing.

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