Sider: Offers a broader multi-model sidebar for quick page summarization, but lacks Glasp's community-driven public highlighting and curation. Glasp records 889,564 monthly visits with -14.1% month-over-month growth and Freemium pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
Highlight the web, learn in public, and build your AI clone
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | ||
|---|---|---|
| Official Domain | glasp.co | sider.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 889.56K (889,564) | 2.64M (2,644,740) |
| MoM Traffic Delta | -146.38K (-14.1%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇺🇸 United States (15.5%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 400.6K | 1.7M |
| User Rating | 4.2 | 4.5 |
| Supported Platforms | Website | Website |
Highlight the web, learn in public, and build your AI clone
Mark up passages on any website or lines in a YouTube transcript from a browser extension, then keep them in one searchable library.
Highlights are shared publicly by default, so you can follow other users, react to their picks and discover sources through people with similar interests.
Generate summaries of long articles, PDFs and YouTube videos to judge relevance fast and to digest what you have already saved.
Trained on your accumulated highlights and notes, the AI clone answers in the shape of your reading history and areas of interest.
AI sidebar and browser agent for reading, writing and research
A persistent panel that reads the page you are on and answers follow-ups with GPT, Claude or Gemini without copying content into another tab.
Summarise long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material.
Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move.
Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistThe AI workspace where teams and agents get work done together
SpecialistReal-time AI answer engine and research workspace combining live web citations with frontier reasoning models.
SpecialistReal-time AI answer engine and research workspace combining live web citations with frontier reasoning models.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
SpecialistExcels at deep scientific literature reading and analysis, whereas Glasp targets general web and video content curation.
SpecialistExcels at deep scientific literature reading and analysis, whereas Glasp targets general web and video content curation.
Provides faster multi-tab AI assistance and article summaries, but lacks dedicated social knowledge curation and note archiving features.
Provides faster multi-tab AI assistance and article summaries, but lacks dedicated social knowledge curation and note archiving features.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.
SpecialistConverts academic papers into structured summary flashcards, but lacks Glasp's broad web article and YouTube highlighting capabilities.
SpecialistConverts academic papers into structured summary flashcards, but lacks Glasp's broad web article and YouTube highlighting capabilities.
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
