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Blens vs SlideSieve

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

Blens compared with SlideSieve
DetailBlens logo BlensSlideSieve logo SlideSieve
What it doesBrowser extension that tracks browsing habits and provides productivity insights with privacy-first approach Auto-capture slides from course videos into clean PDFs with synced transcripts
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Freemium
PricingNot given Free Plan: $0 forever with up to 50 slides and 3 transcript trials. 3-Month Access (Students): $6.99 one time, expires 90 days after purchase. Pro Lifetime (Best Value): $16.99 one time (originally $24.99, 32% launch discount), pay once and use forever with unlimited slides, transcripts, and PDF exp
Key features
  • Browsing Analytics - Track time spent on different websites with detailed breakdowns and visualizations
  • Creativity Assessment - Evaluate browsing diversity and depth with proprietary algorithm
  • Productivity Insights - Identify peak productive times and distractions
  • Time Tracking - Monitor daily, weekly, and monthly browsing patterns with charts
  • Local Storage Only - All data stored on device, never sent to servers
  • Data Encryption - Local data encrypted for maximum security
  • Customizable UI - Dark and light modes with personalized dashboard layout
  • Full Control - Delete data at any time or choose which websites to track
  • Multi-browser Support - Compatible with Chrome, Edge, and Firefox
  • Automatic slide detection that identifies real slide frames and skips instructor webcams, code editors, and transitions
  • Transcript extraction with automatic pulling from supported platforms in Timed View or Readable View
  • Manual snap capture with keyboard shortcuts (Ctrl+Shift+9) for code, notebooks, and demos
  • Customizable Slide Detection Zone to manually define capture area or set exclusion zones
  • PiP Magic Eraser that removes webcam overlays and fills background areas smoothly
  • Deduplication that skips duplicate slides while preserving bullet builds and progressive reveals
  • Multi-View Slide Browser with grid, list, and full-screen presentation views
What makes it different
  • Completely privacy-focused - no data ever sent to servers or shared with third parties
  • Unique Creativity Score - proprietary algorithm evaluates browsing patterns for exploration diversity, engagement depth, browsing balance, connection making, and browsing rhythm
  • Local-only processing - all data stays on your device with no external tracking
  • Self-awareness through objective data - understand personal browsing habits with clear visualizations
  • Works across multiple platforms (DeepLearning.AI, Coursera, Udemy, YouTube) with same toolbar and workflow
  • Free plan with 50 slide captures and 3 transcript trials, no credit card or signup required
  • Lifetime Pro ownership model ($16.99 one time) with all future features included and no recurring subscriptions
  • Supports Chromium-based browsers (Chrome, Edge, Brave, Opera, Arc) officially and on other variants
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 checkNot checked yet no change since last check
Trust Flow (Majestic)30
Citation Flow (Majestic)1816
Referring domains (Majestic)323

4 details filled in for both companies.

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