Kobo Stack Syncs Personal Ebooks for Monthly Fee
The paid service works on four recent Kobo e-readers and is available now in six countries, with older devices promised later.
Updated on Nov. 6, 2026 in Data Centers
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Kobo has launched Stack, a monthly subscription service that lets users upload their own ebooks and documents to Kobo's servers and sync reading progress, highlights, and annotations across devices. The service is shipped in its initial rollout, limited to Canada, Ireland, Australia, New Zealand, the UK, and Spain, and is excluded from the US.
Why it matters
Stack extends the e-reader from a store-bought library into a cloud-synced personal document shelf, a pattern where hardware makers monetize storage and sync rather than just content. Its country-by-country rollout shows how licensing and distribution still gate the rollout of consumer cloud services.
The figures come from Kobo's own launch announcement, not independent testing, and the 200MB per-file cap and 90-day trial are the only specifications published. Supported e-readers are limited to the Clara BW, Clara Colour, Libra Colour, and Elipsa 2E, and older devices made between 2018 and 2024 are only said to get access soon, with no date given.
The players
Kobo
E-reader maker whose hardware, Kobo Cloud storage, and iOS and Android apps form the stack that Stack builds on, with its 6.0 software update now carrying the service.
The details
Stack lets subscribers push EPUB and PDF files to Kobo Cloud, either by dragging them onto Kobo's website or by emailing them to a custom address assigned at signup. Once stored, the documents sync to the iOS and Android apps, the Kobo website, and supported e-readers, carrying reading progress, highlights, and annotations with them. The service is tied to the 6.0 e-reader software update, which Kobo released with Stack included.
Timeline
Kobo's Stack launch article was published on November 6, 2026.
New subscribers get a 90-day free trial before billing begins.
After cancellation, uploaded files remain for a 60-day grace period before they are deleted.
The Tech Race
Stack places Kobo in the subscription-and-sync contest among e-reader makers, where the value is shifting from a device to the cloud account that holds a user's library. The narrow four-device compatibility list and staged country rollout suggest the feature is still an early test of that model rather than a full platform.
Subscribers in the six launch countries can upload EPUB and PDF files up to 200MB and read them across the Kobo apps and supported e-readers. Owners of the Clara BW, Clara Colour, Libra Colour, and Elipsa 2E get access now, while the release for 2018 to 2024 devices is only projected without a date.
The takeaway
Watch whether Kobo extends Stack beyond the six launch countries and the four listed e-readers, since the source gives no timeline for US availability or for older devices. Also track the 6.0 update's wider official release after its beta period, which will determine when the full device list actually gets the feature.
Further reading
For the cloud storage side of services like this, see the Data Centers section.
Source note: This article includes information reported by The Verge.
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