Sider: Integrates frontier chat models into a versatile browser sidebar for on-page summarization, but lacks automated video-watching workflows. HoverNotes records 190,686 monthly visits with +156% month-over-month growth and Freemium pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
AI that watches your video and writes study notes as you watch
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | ||
|---|---|---|
| Official Domain | hovernotes.io | sider.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 190.69K (190,686) | 2.64M (2,644,740) |
| MoM Traffic Delta | +116.19K (+156%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇮🇳 India (51.3%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 94.19K | 1.7M |
| User Rating | 4.3 | 4.5 |
| Supported Platforms | Website | Website |
AI that watches your video and writes study notes as you watch
Captures code, equations, diagrams and slide content exactly as they appear, so notes are complete even on videos with no captions.
Generates headings, bullets and syntax-highlighted code blocks that drop straight into an Obsidian vault or any Markdown editor.
One click adds the current frame to your notes at the right timestamp, ideal for diagrams, demos and UI walkthroughs.
Listen to a speaker in your own language while the video stays in sync, and ask Hovie to explain or summarise any moment using your notes and screenshots.
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.
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.
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 lectures and videos into structured notes and interactive quizzes, but operates primarily as a web app rather than a video browser extension.
SpecialistConverts lectures and videos into structured notes and interactive quizzes, but operates primarily as a web app rather than a video browser extension.
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.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
Transcribes and summarizes video content quickly as a browser extension, but lacks HoverNotes' specialized real-time visual course tracking.
Transcribes and summarizes video content quickly as a browser extension, but lacks HoverNotes' specialized real-time visual course tracking.
Extracts key timestamped insights instantly via a browser extension, though it generates shorter summaries than HoverNotes.
Extracts key timestamped insights instantly via a browser extension, though it generates shorter summaries than HoverNotes.
One AI sidebar for ChatGPT, Claude and Gemini across the web
One AI sidebar for ChatGPT, Claude and Gemini across the web
