# Glasp vs HighlightGPT

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

| Metric | [Glasp](https://openaitools.app/tool/glasp) | [HighlightGPT](https://openaitools.app/tool/highlightgpt) |
| :--- | :--- | :--- |
| Website URL | https://glasp.co | https://chromewebstore.google.com/detail/highlightgpt/eehibkoimhbmcaaifkmhghofocfbeooo |
| Categories | AI Research Tool, AI Agent, AI Summarizer, AI Youtube Summary | AI Answer, Large Language Models (LLMs), AI API, AI Assistant |
| Pricing Model | Freemium | Paid |
| Monthly Visits | 889,564 | 0 |
| MoM Growth Rate | -14.1% | — |
| Primary Market | United States | Global |
| Direct Visits | 400,603 | 0 |
| Review Score | 4.2 | 4.1 |
| 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)

## HighlightGPT

HighlightGPT exists for the moment when a sentence on a webpage does not quite make sense and you do not want to break your reading flow to open a separate chat tab. You highlight the difficult passage and the extension sends it, together with a configurable amount of surrounding page text, to an OpenAI model that returns a plain-language explanation. Because the surrounding paragraph, heading and nearby argument are included, the answer tends to reflect what that sentence means in this specific article rather than a generic dictionary definition.

The extension exposes three levels of context so you can trade accuracy against cost: higher values pull in more of the page and give richer answers, lower values keep requests small and cheap. If a selection is too large for the model's request limit, HighlightGPT automatically reduces how much page content it ingests so the request still goes through. Double-click highlights are deliberately ignored, which prevents accidental triggers while you are simply selecting text to copy.

Setup is minimal but does require an OpenAI API key, and every explanation you generate is billed against that key. The project is a small, single-developer tool published under the name Sacrosaunt, and it upgraded its underlying model to GPT-4o in version 1.1.3. It is best understood as a focused reading aid rather than a full AI assistant suite.

**Pricing & Plans:** The extension itself is free to install, but it is not usable without your own OpenAI API key. You pay OpenAI directly for the tokens each explanation consumes, and larger context settings increase that cost. There is no separate subscription sold inside the extension.

- **In-place explanations:** Highlight a confusing sentence and receive a short explanation without leaving the page or opening another tab.
- **Three context levels:** Choose how much surrounding page text is sent along with your selection to balance answer quality against API cost.
- **Automatic request trimming:** When a selection plus page context exceeds the request size limit, the extension automatically lowers how much page content it ingests.
- **Double-click protection:** Accidental highlights created by double-clicking are ignored, so the tool only fires when you deliberately select text.
- **Bring-your-own-key design:** Runs against your personal OpenAI API key, keeping you in control of model choice, quota and spend.

**Strengths:** Explanations use surrounding page text, so answers match the article rather than a generic definition; No context switching — you stay on the page you are reading; Adjustable context depth lets you control how much you spend per explanation; Simple, single-purpose design with automatic handling of oversized requests

**Limitations:** Requires your own OpenAI API key, which adds setup friction for non-technical users; High context settings can consume your OpenAI quota quickly; Small user base and a narrow feature set — it explains text and little else

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

## Frequently Asked Questions

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

Glasp has 889,564 monthly visits, while HighlightGPT 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%; HighlightGPT 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. HighlightGPT: Paid. The extension itself is free to install, but it is not usable without your own OpenAI API key. You pay OpenAI directly for the tokens each explanation consumes, and larger context settings increase that cost. There is no separate subscription sold inside the extension.

## 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 | [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) |
| 4 | [Sider](https://openaitools.app/tool/sider) | 2,644,740 | -10.6% | Freemium | Offers a broader multi-model sidebar for quick page summarization, but lacks Glasp's community-driven public highlighting and curation. | [.md](https://openaitools.app/tool/sider.md) |
| 5 | [Merlin AI](https://openaitools.app/tool/merlin-ai-plugins) | 1,382,634 | +13.1% | Freemium | Provides faster multi-tab AI assistance and article summaries, but lacks dedicated social knowledge curation and note archiving features. | [.md](https://openaitools.app/tool/merlin-ai-plugins.md) |
| 6 | [Merlin AI](https://openaitools.app/tool/merlin-ai) | 1,382,634 | +13.1% | Freemium | One-click AI assistant for browsing, writing and research | [.md](https://openaitools.app/tool/merlin-ai.md) |
| 7 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | One browser agent that combines every major AI model with web automation | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 8 | [HyperWrite](https://openaitools.app/tool/hyperwrite-ai) | 255,429 | +34.4% | Freemium | AI writing assistant with autocomplete, research, and a Chrome extension | [.md](https://openaitools.app/tool/hyperwrite-ai.md) |
| 9 | [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) |
| 10 | [Glarity](https://openaitools.app/tool/glarity-summarize-google-and-youtube) | 188,823 | -49.6% | Freemium | Provides open-source YouTube and webpage summarization directly in search results, but lacks Glasp's long-term knowledge management. | [.md](https://openaitools.app/tool/glarity-summarize-google-and-youtube.md) |

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

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