Skip to main content

Built by makers, shipped in public

Sign in

MarklyKit 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.

MarklyKit compared with 30 Seconds of Knowledge
DetailMarklyKit logo MarklyKit30 Seconds of Knowledge logo 30 Seconds of Knowledge
What it doesBrowser extension for highlighting, annotating, and taking notes on any webpage Keep your engineering skills sharp with one real code snippet on every new tab
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFreemium Free
PricingFree plan includes unlimited highlighting and drawing with local-only storage. Pro plan costs $7.99/month with a 7-day free trial, including cloud sync, unlimited sticky notes, PDF export, AI connectors, and API access. Free
Key features
  • Privacy masking with blur tool for sensitive data
  • AI connectors for Claude, ChatGPT, and Grok via MCP server
  • Local-first storage with optional cloud sync on Pro plan
  • Keyboard shortcuts for rapid tool switching
  • Focus mode to toggle annotation visibility
  • Browser PDF highlighting support
  • 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
  • Designed specifically for academic research with citation-ready PDF exports
  • Built-in MCP server enabling direct AI integration without copy-pasting
  • No account required to start highlighting immediately
  • 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)Not checked yet no change since last check9 no change since last check
Trust Flow (Majestic)04
Citation Flow (Majestic)620
Referring domains (Majestic)273

5 details filled in for both companies.

More alternatives to MarklyKit More alternatives to 30 Seconds of Knowledge

Ask us