# Glasp vs Pebble

Glasp records 889,564 monthly visits with -14.1% month-over-month growth and Freemium pricing. Pebble records 0 monthly visits with — growth and Freemium pricing.

| Metric | [Glasp](https://openaitools.app/tool/glasp) | [Pebble](https://openaitools.app/tool/pebble) |
| :--- | :--- | :--- |
| Website URL | https://glasp.co | https://chromewebstore.google.com/detail/pebble/pkakeldcbkglmgfdpknjdkcficoompgd |
| Categories | AI Research Tool, AI Agent, AI Summarizer, AI Youtube Summary | AI Reader, AI Assistant, AI Summarizer, AI Copilot |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 889,564 | 0 |
| MoM Growth Rate | -14.1% | — |
| Primary Market | United States | Global |
| Direct Visits | 400,603 | 0 |
| Review Score | 4.2 | 4 |
| Saved Count | 12 | 0 |
| Supported Platforms | Website | Browser Extension |

## Glasp

Glasp started from a simple observation: most people highlight things they never look at again. Instead of trapping highlights inside one app, Glasp makes them social. Install the extension, highlight a paragraph on any site or a line in a YouTube transcript, and it lands in your Glasp profile where you can add notes and tags. Because highlights are public by default unless you make them private, a feed of what like-minded people are reading and marking emerges — you can follow other users, see what resonates, and discover sources you would not have found on your own.

Your library becomes the raw material for AI features. Glasp can summarize a long article, a PDF or a YouTube video so you can decide whether it deserves reading, and it can organize what you have already saved into themes. The standout feature is the AI clone: by training on your own accumulated highlights and notes, it produces something that answers in the shape of your interests and reading history. There is also a digital-legacy angle, letting you hand your accumulated knowledge to someone else.

Glasp is free to start, with paid tiers for heavier use and greater AI capacity. Its real niche is learners, researchers, students and content curators who treat annotation as a public, collaborative practice rather than a private bookmark folder — and who want their saved material to do work for them later instead of gathering dust.

**Pricing & Plans:** Freemium. A free tier covers the core highlighting, saving and sharing features with limited AI usage; paid plans add higher AI limits and additional capacity. Check glasp.co for current tier pricing, as it is not published in our listing data.

- **Web and YouTube highlighting:** Mark up passages on any website or lines in a YouTube transcript from a browser extension, then keep them in one searchable library.
- **Social learning feed:** Highlights are shared publicly by default, so you can follow other users, react to their picks and discover sources through people with similar interests.
- **AI summarization:** Generate summaries of long articles, PDFs and YouTube videos to judge relevance fast and to digest what you have already saved.
- **Your own AI clone:** Trained on your accumulated highlights and notes, the AI clone answers in the shape of your reading history and areas of interest.
- **Notes, tags and Kindle import:** Add your own commentary and tags to every highlight, and bring in Kindle highlights so your reading lives in one place.

**Strengths:** Turns throwaway highlighting into a genuinely reusable, searchable library; The social feed surfaces sources through people rather than an opaque algorithm; AI summarization and the AI clone are built on your own saved material, not generic content; Works across web pages, YouTube, PDFs and Kindle imports in one place

**Limitations:** Public-by-default sharing is not for everyone; private lives behind a toggle you have to remember; The AI clone only becomes useful after you have accumulated a real body of highlights; Free-tier AI usage is limited, so heavy summarization pushes you to a paid plan

[Profile (Markdown)](https://openaitools.app/tool/glasp.md)

## Pebble

Pebble is an AI-powered active-reading companion for the web, distributed as a Chrome extension. Its premise is that reading and watching content online is usually passive, so information slips away quickly. Pebble counters that by weaving comprehension checks into the browsing experience: embedded AI questions prompt you to reflect on what you just read, and inline document Q&A lets you interrogate a page's content without opening another tab.

Beyond articles, Pebble extends to video. While you watch YouTube, it generates live AI questions that keep you engaged with the material. Everything you highlight, note or answer can be saved to memory, and the extension then turns that material into spaced-repetition and AI quizzes tied to the source website, so review is anchored to where you originally learned it.

The extension is published on the Chrome Web Store by a developer operating as "pebble" (contact me@harshpatel.ai), holds a 5.0 rating from a small number of reviewers, and offers in-app purchases for unlocked features. It is lightweight and English-only, with the latest version listed at 1.1, updated in June 2024.

**Pricing & Plans:** Free to install from the Chrome Web Store, with optional in-app purchases that unlock the full feature set.

- **Active-reading questions:** Embedded AI questions check whether you are genuinely absorbing a page instead of skimming past it.
- **Highlights and notes:** Highlight and annotate articles, then keep those notes organized so they are easy to revisit.
- **Document Q&A:** Ask questions directly about the page content and get answers in place, deepening comprehension on the spot.
- **Live questions on YouTube:** Live AI-generated questions appear while you watch YouTube, turning video into an active-learning exercise.
- **Spaced-repetition memory:** Saved questions, highlights and notes become spaced-repetition and AI quizzes to lock in what you learned.

**Strengths:** Turns passive reading and watching into active learning; Works across both web articles and YouTube videos; Highlights, notes and Q&A stay anchored to the source page; Spaced-repetition memory and quizzes aid long-term recall

**Limitations:** Small install base (about 57 users) and few reviews; In-app purchases are required for the full experience; Last updated in 2024, so feature velocity appears low; Requires a Google account to install and only supports English

[Profile (Markdown)](https://openaitools.app/tool/pebble.md)

## Frequently Asked Questions

### How do Glasp and Pebble compare in monthly traffic?

Glasp has 889,564 monthly visits, while Pebble has 0. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Glasp has a month-over-month growth rate of -14.1%; Pebble has —.

### How does pricing compare?

Glasp: Freemium. Freemium. A free tier covers the core highlighting, saving and sharing features with limited AI usage; paid plans add higher AI limits and additional capacity. Check glasp.co for current tier pricing, as it is not published in our listing data. Pebble: Freemium. Free to install from the Chrome Web Store, with optional in-app purchases that unlock the full feature set.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Notion](https://openaitools.app/tool/t) | 173,441,670 | +0.1% | Freemium | The AI workspace where teams and agents get work done together | [.md](https://openaitools.app/tool/t.md) |
| 2 | [Perplexity](https://openaitools.app/tool/perplexity-ai) | 88,310,223 | -3.7% | Freemium | Real-time AI answer engine and research workspace combining live web citations with frontier reasoning models. | [.md](https://openaitools.app/tool/perplexity-ai.md) |
| 3 | [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | -11.3% | Freemium | All-in-one AI assistant across web, browser, desktop and mobile | [.md](https://openaitools.app/tool/monica-ai.md) |
| 4 | [SciSpace](https://openaitools.app/tool/scispace) | 4,464,111 | +8.6% | Freemium | Excels at deep scientific literature reading and analysis, whereas Glasp targets general web and video content curation. | [.md](https://openaitools.app/tool/scispace.md) |
| 5 | [Sider](https://openaitools.app/tool/sider) | 2,644,740 | -10.6% | Freemium | AI sidebar and browser agent for reading, writing and research | [.md](https://openaitools.app/tool/sider.md) |
| 6 | [Merlin AI](https://openaitools.app/tool/merlin-ai-plugins) | 1,382,634 | +13.1% | Freemium | One AI assistant that plugs ChatGPT, Claude and Gemini into every tab | [.md](https://openaitools.app/tool/merlin-ai-plugins.md) |
| 7 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | Delivers powerful web automation and page summarization, but features a steeper learning curve than Glasp's streamlined extension. | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 8 | [Scholarcy](https://openaitools.app/tool/scholarcy) | 195,058 | +4.6% | Freemium | Converts academic papers into structured summary flashcards, but lacks Glasp's broad web article and YouTube highlighting capabilities. | [.md](https://openaitools.app/tool/scholarcy.md) |
| 9 | [Glarity](https://openaitools.app/tool/glarity-summarize-google-and-youtube) | 188,823 | -49.6% | Freemium | Summarize YouTube, Google, and any page with AI — free in your browser | [.md](https://openaitools.app/tool/glarity-summarize-google-and-youtube.md) |
| 10 | [Kome AI](https://openaitools.app/tool/kome-ai) | 174,910 | -6.5% | Freemium | Summarize, bookmark and write with AI right in your browser | [.md](https://openaitools.app/tool/kome-ai.md) |

---
Source: https://openaitools.app/compare/glasp-vs-pebble

More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)