Summarize, bookmark and write with AI right in your browser

12 alternatives to Casper AI, matched by what they do.
| 3 | Gist AI | gistai.tech | 4.11K | -1.11K (-21.3%) | Free | India | 3.8 | Compare |
| 4 | Glasp | glasp.co | 889.56K | -146.38K (-14.1%) | Freemium | United States | 4.2 | Compare |
| 5 | Briefy | briefy.ai | 19.3K | 4.43K (+29.8%) | Freemium, Free Trial | United States | 4.1 | Compare |
| 6 | Gene | askgene.io | 2.49K | 1.16K (+87%) | Free | Global | 4.1 | Compare |
| 7 | Merlin AI | getmerlin.in | 1.38M | 159.85K (+13.1%) | Freemium | United States | 4.3 | Compare |
| 8 | AI Summary Generator | summarygenerator.io | 9.85K | -314 (-3.1%) | Freemium | United States | 3.8 | Compare |
| 9 | Sider | sider.ai | 2.64M | -314.2K (-10.6%) | Freemium | United States | 4.5 | Compare |
| 10 | HARPA AI | harpa.ai | 537.46K | 267.81K (+99.3%) | Freemium | United States | 4.6 | Compare |
| 11 | TLDR This | tldrthis.com | 82.61K | -21.29K (-20.5%) | Free | United States | 4.2 | Compare |
| 12 | BLUF | bluf.ai | 3.95K | -1.34K (-25.3%) | Freemium | United States | 4.1 | Compare |
Summarize, bookmark and write with AI right in your browser

Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
#2
One free Chrome extension that summarizes websites, YouTube videos and PDFs in a single click
Highlight the web, learn in public, and build your AI clone

Turn long articles, videos and PDFs into structured summaries you can actually search.

A low-cost AI assistant that lives in your browser tab

One AI assistant that plugs ChatGPT, Claude and Gemini into every tab
Summarize long text, articles and PDFs in one click
AI sidebar and browser agent for reading, writing and research
One browser agent that combines every major AI model with web automation

Turn any long article or webpage into a clean, clickable summary in one click

Bottom Line Up Front for every page, PDF and video you read
Summarize, bookmark and write with AI right in your browser
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
One free Chrome extension that summarizes websites, YouTube videos and PDFs in a single click
Highlight the web, learn in public, and build your AI clone
Turn long articles, videos and PDFs into structured summaries you can actually search.
A low-cost AI assistant that lives in your browser tab
One AI assistant that plugs ChatGPT, Claude and Gemini into every tab
Summarize long text, articles and PDFs in one click
AI sidebar and browser agent for reading, writing and research
Turn any long article or webpage into a clean, clickable summary in one click
Bottom Line Up Front for every page, PDF and video you read