AI sidebar and browser agent for reading, writing and research

12 alternatives to MARK•R, matched by what they do.
| Rank | Tool & Tagline | Official Domain | Monthly Visits | MoM Growth | Pricing Model | Primary Market | Rating | Compare |
|---|---|---|---|---|---|---|---|---|
| ● | MARK•R | mark-r.com | 43 | -825 (-95.1%) | Freemium | Global | 4.2 | Profile |
| 1 | Sider | sider.ai | 2.64M | -314.2K (-10.6%) | Freemium | United States | 4.5 | Compare |
| 2 | Merlin AI | getmerlin.in | 1.38M | 159.85K (+13.1%) | Freemium | United States | 4.3 | Compare |
| 3 | Monica | monica.im | 4.51M | -573.08K (-11.3%) | Freemium | United States | 4.3 | Compare |
| 4 | Glasp | glasp.co | 889.56K | -146.38K (-14.1%) | Freemium | United States | 4.2 | Compare |
| 5 | Chippy | chippyai.com | 2.99K | 683 (+29.6%) | Freemium | Uzbekistan | 4 | Compare |
| 6 | Locus | locusextension.com | 615 | -3.51K (-85.1%) | Freemium, Free Trial | United States | 4.1 | Compare |
| 7 | Walles.ai - Your AI Browser Sidekick | walles.ai | 8.31K | -5.35K (-39.2%) | Freemium | Global | 3.8 | Compare |
| 8 | Kome AI | kome.ai | 174.91K | -12.18K (-6.5%) | Freemium | India | 4.1 | Compare |
| 9 | Perplexity | perplexity.ai | 88.31M | -3.39M (-3.7%) | Freemium | United States | 4.7 | Compare |
| 10 | HARPA AI | harpa.ai | 537.46K | 267.81K (+99.3%) | Freemium | United States | 4.6 | Compare |
| 11 | ExplainThis | explainthis.ai | 1.46K | -1.72K (-54%) | Free | United States | 3.9 | Compare |
| 12 | AIAssist | chromewebstore.google.com | 0 | 0 (—) | Free | Global | 4 | Compare |
AI sidebar and browser agent for reading, writing and research
One-click AI assistant for browsing, writing and research

All-in-one AI assistant across web, browser, desktop and mobile
Highlight the web, learn in public, and build your AI clone

ChatGPT in your browser sidebar, without switching tabs

Ctrl+F, reimagined with AI for web pages and PDFs
Your GPT-powered sidekick for every page, PDF and video
Summarize, bookmark and write with AI right in your browser
Real-time AI answer engine and research workspace combining live web citations with frontier reasoning models.
One browser agent that combines every major AI model with web automation
Summarise and explain any page or video as you browse

An AI copilot in your browser for reading, summarizing and questioning anything on the page.
AI sidebar and browser agent for reading, writing and research
One-click AI assistant for browsing, writing and research
All-in-one AI assistant across web, browser, desktop and mobile
Highlight the web, learn in public, and build your AI clone
ChatGPT in your browser sidebar, without switching tabs
Ctrl+F, reimagined with AI for web pages and PDFs
Your GPT-powered sidekick for every page, PDF and video
Summarize, bookmark and write with AI right in your browser
Real-time AI answer engine and research workspace combining live web citations with frontier reasoning models.
Summarise and explain any page or video as you browse
An AI copilot in your browser for reading, summarizing and questioning anything on the page.