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30 Seconds of Knowledge vs Vocnu

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

30 Seconds of Knowledge compared with Vocnu
Detail30 Seconds of Knowledge logo 30 Seconds of KnowledgeVocnu logo Vocnu
What it doesKeep your engineering skills sharp with one real code snippet on every new tab AI voice-over and subtitles for any video in your browser in 38 languages
StageNot given Not given
FoundedNot given Not given
Based inNot given LT
Pricing modelFree Freemium
PricingFree Premium: 2 credits per minute voice-over, or 0.2 credits when replaying a voiced video; Standard: 1 credit per minute, or 0.2 credits replayed; Economy: 0.5 credits per minute, or 0.2 credits replayed. Subtitles only: 1 credit per minute (Premium translation) or 0.5 credits (Economy). One-time packs
Key features
  • 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
  • Works on any video player including YouTube, streaming sites, course sites, and live streams
  • No subtitles required; translates from audio directly
  • 38 languages supported for voice-over and subtitles
  • Maintains consistent character and place names throughout series
  • Synchronized voice-over that follows pauses and seeking
  • Original audio remains audible at adjustable levels
  • Automatic language detection
  • Subtitles-only option at lower credit cost
What makes it different
  • 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
  • Works where subtitles don't exist, translating directly from audio
  • Proper translation support for small languages like Lithuanian, Slovak, Czech and Ukrainian with correct grammar
  • Free replay of already-voiced content within 90 days and for archived videos
  • Only 40 free credits needed to start, no card required
  • Library of pre-voiced popular videos to watch immediately without waiting
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)10 +1 (up) since last check1 no change since last check
Trust Flow (Majestic)41
Citation Flow (Majestic)2015
Referring domains (Majestic)735

5 details filled in for both companies.

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