Calibre — E-readers (Open Source)

Calibre is an open-source E-readers solution from Calibre. Review its features and licensing on FreeSoftwareX — by features, licensing and price — and request a quote or demo free in 2026.

What is Calibre?

Calibre is open source — its source code is publicly available and free to use, modify and self-host, usually with an active community and no licensing fees. It is categorised under E-readers and published by Calibre. Buyers typically evaluate Calibre when they need a dependable E-readers option and want to weigh the trade-offs between free, open-source and paid tools before committing.

• Category: E-readers
• Brand: Calibre
• License: Open Source

Frequently asked questions

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