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Second Read vs 30 Seconds of Knowledge

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Second Read compared with 30 Seconds of Knowledge
DetailSecond Read logo Second Read30 Seconds of Knowledge logo 30 Seconds of Knowledge
What it doesEverything you save, read again. Keep your engineering skills sharp with one real code snippet on every new tab
StageStartup Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Free
PricingFree with no paid tier planned. Free
Key features
  • Drag-and-drop text capture from any screen element
  • Automatic passage selection on new tabs based on spaced repetition
  • Kindle highlight synchronization
  • Telegram bot integration
  • Email and Telegram digests
  • Web library with search and tagging
  • Export to Markdown or JSON
  • Works offline with local storage
  • Optical character recognition for non-selectable text
  • No password authentication
  • Support for JavaScript, Python, React, Git, C++, C#, CSS, Dart, Go, HTML, PHP, and Interview Questions
  • Live Preview for CSS snippets
  • Random snippet or browse favorites and all snippets
  • Available on Chrome, Firefox, Edge, Brave, and Arc
  • Open source project on GitHub
What makes it different
  • Runs entirely offline with no external server storage of your captures
  • Uses spaced repetition to surface passages you are most likely to forget
  • No paid tier or premium features planned
  • Helps prevent engineering skill atrophy in the age of AI
  • One real code snippet delivered every new tab without requiring courses or streaks
  • 25,000+ developers using the extension with 1,000+ GitHub stars
  • Featured as #2 Product of the Day on Product Hunt
  • 5-star rating on Chrome Web Store
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)4 no change since last check9 no change since last check
Trust Flow (Majestic)64
Citation Flow (Majestic)1520
Referring domains (Majestic)373

5 details filled in for both companies.

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