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LemonInk

Ebook & audiobook watermarking and DRM

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LemonInk is a service for protecting and delivering ebooks and audiobooks sold online. It applies watermarking or Readium LCP DRM to files in EPUB, MOBI, PDF and MP3 formats, hosts the protected copies, and provides download pages for buyers, handling access control and delivery so sellers can focus on their catalog.

It offers watermarking that signs each copy with the buyer's name, and Readium LCP DRM (in invite-only beta) that encrypts files with expiring personal licences for lending and subscriptions. Integrations cover Shopify, WooCommerce, PrestaShop, Shoper and Zapier, plus a RESTful JSON API with a PHP client library for custom stores. Download links can also be sent by email with custom templates. Protection method can be chosen per book.

LemonInk is aimed at publishers and authors selling directly rather than through large platforms. Pricing is credit-based: one credit per ebook sale, whether watermarked or DRM-protected, with storage and repeat downloads included. A free trial provides initial credits on sign-up, and auto-recharge can be configured for ongoing use.

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