According to AlphaMoat, as of 2026-09, the Chrome extension CleoSum has 29 users (+11.5% MoM), rated 5 (2 reviews) — ranked #6,600 of 9,324 AI browser extensions, and #509 of 744 in Writing.
What is CleoSum
AI analyzes YouTube videos before you click. See scores, summaries, comment insights & transcripts on thumbnails. Stop wasting time on low-quality YouTube videos. CleoSum uses AI to analyze any video before you watch it — so you know what's worth your time.
Hover over any YouTube thumbnail to instantly access four powerful tools: Analyze, Summarize, Comments, and Transcript. CleoSum works everywhere on YouTube — the home feed, search results, channel pages, and the watch page sidebar.
FEATURES
-- Analyze -- Get a full video breakdown in seconds. CleoSum's AI evaluates usefulness score (0-100), content density, filler detection, key topics, target audience, and a clear watch/skip/skim recommendation. Color-coded stat bars make it easy to see quality at a glance.
-- Summarize -- Read a structured summary instead of watching the whole video. Includes a TL;DR, key points, timestamped sections you can click to jump directly to that moment, and notable quotes. Perfect for research, studying, or catching up fast.
-- Comment Analysis -- Understand what the community thinks without scrolling through hundreds of comments. AI extracts the overall sentiment, recurring themes, top insights, and flags any controversy — so you get the pulse of the audience instantly.
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-- Full Transcript -- Access the complete video transcript with clickable timestamps. Copy the entire text to your clipboard with one click. Great for note-taking, quoting, or reading at your own pace.
-- Watch Page Panel -- On the video watch page, CleoSum adds a dedicated panel below the video player with all four tools accessible without hovering. Your analysis stays visible while you watch.
-- Deep Analysis (Pro+) -- Upgrade to Pro+ and unlock Deep Analysis mode — powered by a more capable long-context AI model for sharper, more thorough summaries on long-form content. 10 Deep Analyses per day on top of your 100 standard analyses.
-- Share and Copy -- Copy any analysis or summary to your clipboard with one click. Share insights with your team, paste into notes, or save for later.
-- Customization -- Adjust font size and analysis language. Supports 40+ languages, including English, Spanish, French, German, Chinese, Japanese, Korean, Arabic, Hindi, and many more.
HOW IT WORKS
1. Install CleoSum from the Chrome Web Store. 2. Sign in with your Google account (takes 2 seconds). 3. Browse YouTube normally. CleoSum buttons appear when you hover over any video thumbnail. 4. Click Analyze, Summarize, Comments, or Transcript. 5. Read the AI-generated results right on the thumbnail — no new tabs, no context switching.
PRICING
Free — 1 analysis to try the product, no credit card required.
$1 / 3-Day Pro+ Trial — full Pro+ access for 3 days. $1 charged today; auto-renews at $14.99/month (annual) on day 4 unless cancelled. Cancel in one click from the popup. The $1 trial fee is non-refundable; auto-billed subscription charges are eligible for refund within 14 days for EU/EEA customers per the EU Consumer Rights Directive.
Pro — $12.99/month or $7.99/month billed annually
- 50 analyses per day, 1,000 per month
- Full AI summaries, comment analysis, transcripts
- All 40+ languages
Pro+ — $19.99/month or $14.99/month billed annually
- Everything in Pro
- Deep Analysis mode (Claude Sonnet 4.6)
- 100 Quick + 10 Deep analyses per day
- Longer transcripts (40K characters)
Cancel anytime.
PRIVACY AND SECURITY
CleoSum only activates on YouTube. It does not track your browsing history, read your personal data, or access your YouTube account. Video transcripts are processed by AI solely to generate your analysis. Cached analyses are kept for up to 7 days by video ID (not user ID) and are never used for AI training. Payments are handled securely by Stripe — credit card numbers never touch our servers. Read our full privacy policy at https://cleosum.com/privacy.html
Built by CleoLead. Questions or feedback? [email protected]
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+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.