Koberger vs Sigil

Koberger9.3Visit Sigil8.4Visit

Higher score Koberger #1 in eBook Creation Software 9.3/10 Free plan Free plan✓ 0 of 6 features Visit Koberger

vs

Sigil #7 in eBook Creation Software 8.4/10 Free plan Free plan✓ 2 of 6 features Visit Sigil

• Koberger fits best

  Authors needing a complete cross-platform workflow

• Sigil fits best

  Free EPUB editors and technically inclined authors

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Side by side

Feature	Koberger 9.3/10 Visit ↗	Sigil 8.4/10 Visit ↗
At a glance
Editor score	9.3	8.4
Ranking	#1 in eBook Creation Software	#7 in eBook Creation Software
Best for	Authors needing a complete cross-platform workflow	Free EPUB editors and technically inclined authors
Pricing model	Free plan + paid	Free
Starting price	$59.94/yr	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud, Browser extension	Desktop
Platforms	Web, Windows, macOS, Linux	Windows, macOS, Linux
Built for	Solo, Small business	Solo, Small business
Features Koberger 0/6 · Sigil 2/6
EPUB export	Not checked yet	✓ (best)
PDF export	Not checked yet	Not checked yet
Reflowable layout	Not checked yet	Not checked yet
Fixed-layout support	Not checked yet	Not checked yet
Ebook validation	Not checked yet	✓ (best)
Accessibility tools	Not checked yet	Not checked yet
Specs
Import formats	Not checked yet	EPUB, HTML, images, stylesheets
Our review
Pros	Imports DOCX manuscripts and detects chapters Supports EPUB accessibility checks and print PDF export Connects with Amazon KDP, IngramSpark, Apple Books, Kobo, and Google Play Books	Supports EPUB 2 and EPUB 3 editing with code and preview views Includes plugins, checkpoints, TOC tools, and configurable spell checking Runs on Windows, macOS, and Linux with EPUB validation tools
Cons	Finished-file exports require a Pro plan Monthly Pro applies to a single book No AI features are included	Focused on EPUB rather than broader publishing workflows PDF export is not part of its documented product capabilities Desktop software may not suit teams seeking a hosted service
Our verdict	Koberger is a browser-based book formatting platform from Hut Six Digital for indie authors and publishers. It runs on Windows, macOS, Linux, and Chromebook browsers without a native installation. Authors can import DOCX manuscripts,… Read the review →	Sigil is a free, open-source desktop application for creating, editing, formatting, and packaging EPUB ebooks. It supports EPUB 2 and EPUB 3 and is aimed at personal ebook formatting as well as professional editors publishing across… Read the review →

Strengths and trade-offs

• Koberger — where it wins

  • Imports DOCX manuscripts and detects chapters
  • Supports EPUB accessibility checks and print PDF export
  • Connects with Amazon KDP, IngramSpark, Apple Books, Kobo, and Google Play Books

  Where it doesn't

  • Finished-file exports require a Pro plan
  • Monthly Pro applies to a single book
  • No AI features are included

• Sigil — where it wins

  • Supports EPUB 2 and EPUB 3 editing with code and preview views
  • Includes plugins, checkpoints, TOC tools, and configurable spell checking
  • Runs on Windows, macOS, and Linux with EPUB validation tools

  Where it doesn't

  • Focused on EPUB rather than broader publishing workflows
  • PDF export is not part of its documented product capabilities
  • Desktop software may not suit teams seeking a hosted service

• Koberger9.3/10 · Free plan

  A complete cross-platform workflow with free formatting and paid exports.

  Visit KobergerFull verdict →
• Sigil8.4/10 · Free plan

  A capable free EPUB editor for authors comfortable with desktop publishing workflows.

  Visit SigilFull verdict →