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Libraries · head to head

Libby vs Rollup

Libby logo

Libby

Libraries

Free ebook and audiobook app from OverDrive, gated entirely on an active public library card

From
Free
Rated
-
Full reviewWebsite
Rollup logo

Rollup

Web Development

JavaScript module bundler built for libraries

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Libby popular and new titles are frequently unavailable for weeks or months due to holds queues, which makes it unreliable for reading something the day you want to start it.; Rollup slower than the Go and Rust bundlers that followed it, since it is written in JavaScript
  • They diverge on capability: Libby covers Library card authentication, Rollup covers Tree shaking.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Libby and Rollup actually diverge.

Attributes where Libby and Rollup differ
AttributeLibbyRollup
Pricing modelFree with a participating library card, no subscriptionOpen source, no licence fee
PlatformsiOS, Android, Web, Kindle (for ebooks)Linux, macOS, Windows
CategoryLibrariesWeb Development

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 Libby

  • Library card authentication
  • Holds queues
  • Multi-library support
  • OverDrive Read and Listen
  • Send to Kindle
  • Tags and shelves

Only in Rollup

  • Tree shaking
  • Clean output
  • Multiple output formats
  • Plugin API

What people use each for

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

Libby

  • A reader who wants free access to bestsellers and is willing to wait weeks in a holds queue for popular new releasesnot Rollup
  • Someone who holds cards for multiple library systems and wants to widen their available catalogue in one appnot Rollup
  • A reader who wants ebooks sent directly to a Kindle without buying themnot Rollup
  • A budget-conscious reader who already pays library taxes and wants to use the benefit fully instead of also paying for Everand or Storytelnot Rollup

Rollup

  • Publishing a JavaScript library in several module formatsnot Libby
  • Builds where output size and cleanliness matter more than build speednot Libby
  • Producing ES module output for consumers who will bundle it themselvesnot Libby

Where each one falls short

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

Libby

  • Popular and new titles are frequently unavailable for weeks or months due to holds queues, which makes it unreliable for reading something the day you want to start it.
  • Borrow and hold limits are set per library, so the experience is inconsistent between library systems and can change without notice.
  • Not every library subscribes to OverDrive, and even those that do vary hugely in how many digital copies of any given title they can afford to licence.
  • It requires a real library card tied to residency or another eligibility rule in most systems, so it is not available to everyone regardless of willingness to pay.
  • There is no offline bulk downloading beyond what is borrowed, and loan periods expire automatically, returning the book whether or not you finished it.

Rollup

  • Slower than the Go and Rust bundlers that followed it, since it is written in JavaScript
  • Application concerns like dev servers and hot reloading are not its job, so app builds need Vite on top
  • Configuration for non-trivial applications gets verbose compared with tools that assume more

Pricing, plan by plan

Libby

Free
  • LibbyFree
    • Free with an eligible library card
    • Borrow limits set by your library, not Libby
    • Holds queues on licensed copies

Rollup

Free
  • RollupFree
    • Full functionality
    • Commercial use permitted
    • Community support

Which should you pick?

Choose Libby if

  • You need library card authentication.
  • You want to start without paying.
  • You work on iOS, Android, Web, Kindle (for ebooks).
  • You also want holds queues.
Libby review

Choose Rollup if

  • You need tree shaking.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want clean output.
Rollup review

Questions people ask

Is Libby or Rollup better?
Neither clearly leads. Libby starts at Free and Rollup at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Libby or Rollup?
Libby starts at Free and Rollup at Free.
Does Libby or Rollup run on more platforms?
Libby runs on iOS, Android, Web, Kindle (for ebooks). Rollup runs on Linux, macOS, Windows.
Can I use Libby for free?
Both have a free tier, so you can try either at no cost before committing.
What is Libby best used for?
Libby is most often used for a reader who wants free access to bestsellers and is willing to wait weeks in a holds queue for popular new releases, someone who holds cards for multiple library systems and wants to widen their available catalogue in one app, a reader who wants ebooks sent directly to a kindle without buying them, a budget-conscious reader who already pays library taxes and wants to use the benefit fully instead of also paying for everand or storytel. Of those, a reader who wants free access to bestsellers and is willing to wait weeks in a holds queue for popular new releases and someone who holds cards for multiple library systems and wants to widen their available catalogue in one app are not what Rollup is typically brought in for.
What can Libby do that Rollup cannot?
Libby covers Library card authentication, Holds queues, Multi-library support, OverDrive Read and Listen. Rollup covers Tree shaking, Clean output, Multiple output formats, Plugin API.

Answered from the vendors’ own pages

Libby: Do I pay for Libby?

No, it is free, but you need an active card from a library that uses the OverDrive/Libby system.

Rollup: Is Rollup free?

Yes, open source under the MIT licence.

Libby: Why is the book I want unavailable?

Libraries licence a limited number of digital copies, so popular titles go into a holds queue just like physical books.

Rollup: Rollup or webpack?

Rollup is the usual choice for libraries thanks to cleaner output and better tree shaking. webpack remains stronger for complex applications with heavy asset handling.

Libby: Can I use Libby without a library card?

No, a valid card and PIN from a participating library are required for every feature.

Rollup: Do I need Rollup if I use Vite?

Not directly. Vite uses Rollup for production builds, so you already benefit from it.

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