Unverified50% confidenceFactExact time
Amazon Kindle uses the proprietary AZW/KFX format, Kobo uses the Kepub format, and the open-standard EPUB is widely supported.
1
Sources
50%
Confidence
Long-term
Relevance
10/28/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedKindle relies on Amazon's bookstore ecosystem and hardware devices, while Kobo has its own user base thanks to its openness and multi-format support.75% similarUnverified亚马逊 Kindle 使用的 AZW/KFX 格式和 Adobe 的 EPUB DRM 均是 DRM 的典型实现70% similarUnverifiedReadr can open EPUB and PDF format files that users own themselves.53% similarUnverifiedEPUB 是由国际数字出版论坛（IDPF，现并入 W3C）制定的开放标准，是目前最被广泛支持的非专有电子书格式52% similar
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