ExplainThis records 1,463 monthly visits with -54% month-over-month growth and Free pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
Summarise and explain any page or video as you browse
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | ||
|---|---|---|
| Official Domain | explainthis.ai | sider.ai |
| Pricing Model | Free | Freemium |
| Monthly Visits | 1.46K (1,463) | 2.64M (2,644,740) |
| MoM Traffic Delta | -1.72K (-54%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇺🇸 United States (100%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 428 | 1.7M |
| User Rating | 3.9 | 4.5 |
| Supported Platforms | Website | Website |
Summarise and explain any page or video as you browse
Turn long articles and pages into a readable summary so you can decide what deserves a full read.
Get the key takeaways from YouTube videos without sitting through the entire runtime.
Primarily a Chrome extension, so it sits alongside whatever you are already browsing rather than forcing a separate app.
Built for startup knowledge workers who need context fast across marketing, sales and product research.
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.
One AI assistant that plugs ChatGPT, Claude and Gemini into every tab
One AI assistant that plugs ChatGPT, Claude and Gemini into every tab
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.
Highlight the web, learn in public, and build your AI clone
Highlight the web, learn in public, and build your AI clone
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.
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.
Summarize any YouTube video into key ideas and timestamped notes in seconds.
Summarize any YouTube video into key ideas and timestamped notes in seconds.
One AI sidebar for ChatGPT, Claude and Gemini across the web
One AI sidebar for ChatGPT, Claude and Gemini across the web
