Readwise aggregates highlights from Kindle, articles, podcasts, and tweets into a spaced-repetition review system. bookmarks.md focuses specifically on X bookmarks with automated sync, AI notes, and email delivery.
Feature Comparison
| Feature | bookmarks.md | Readwise |
|---|---|---|
| X bookmark sync | Automatic via X API | Via Twitter likes/highlights |
| Email digests | ||
| AI-generated notes | AI summaries in Reader | |
| Developer API | ||
| Spaced repetition | ||
| Multi-source (Kindle, articles, etc.) | X only | |
| AI agent support (SKILL.md) | ||
| Export to Notion/Obsidian | ||
| Starting price | $12/mo | $8.99/mo |
The Verdict
Readwise is the knowledge management power tool, pulling from everywhere. If your workflow already lives in Readwise, its tweet integration might be enough. Choose bookmarks.md if X bookmarks are your primary source and you want dedicated AI notes, a cleaner digest, and a developer API built for automation.