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Header Override vs Second Read

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

Header Override compared with Second Read
DetailHeader Override logo Header OverrideSecond Read logo Second Read
What it doesOpen-source browser extension to modify HTTP request and response headers and cookies Everything you save, read again.
StageNot given Startup
FoundedNot given Not given
Based inNot given Not given
Pricing modelOpen source Free
PricingNot given Free with no paid tier planned.
Key features
  • Modify request and response headers with a focused editor interface
  • Scope rules to specific URLs using browser-supported filter patterns
  • Customize response cookies with Domain, Path, SameSite, Lifetime, Max-Age, and Secure attributes
  • Create up to five local rule profiles for different projects and test setups
  • Import and export profiles as local JSON files between browsers
  • Enable, disable, delete, and annotate rules with comments
  • Support for Chrome, Edge, and Firefox
  • All rules stored locally in browser with no server transmission
  • 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
What makes it different
  • Open-source with MIT License and full transparency
  • Rules stored entirely locally with no analytics, tracking, or external servers
  • Lightweight alternative to ModHeader
  • URL scoping prevents rules from affecting unintended websites
  • Simple interface requires no coding knowledge
  • 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
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)8 no change since last check4 no change since last check
Trust Flow (Majestic)36
Citation Flow (Majestic)1815
Referring domains (Majestic)133

4 details filled in for both companies.

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