Side Reader records 355 monthly visits with -36.5% month-over-month growth and Freemium pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
Read and chat with PDFs right beside ChatGPT, Claude and DeepSeek.
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | ||
|---|---|---|
| Official Domain | side-reader.com | sider.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 355 (355) | 2.64M (2,644,740) |
| MoM Traffic Delta | -204 (-36.5%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇻🇳 Vietnam (100%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 149 | 1.7M |
| User Rating | 2.4 | 4.5 |
| Supported Platforms | Website | Website |
Read and chat with PDFs right beside ChatGPT, Claude and DeepSeek.
PDFs render directly in the sidebar next to the chat, so your document and the AI conversation are visible at the same time.
Summarize a whole document, translate it, or have passages explained in simpler terms using the AI you are already signed into.
Built-in buttons cover the common actions, and you can edit their prompts to make the AI respond in the format and tone you need.
Ask about charts, scans or regions that cannot be selected by taking a screenshot question instead.
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.
AI research platform for reading, understanding and writing scientific papers
AI research platform for reading, understanding and writing scientific papers
A free, AI-powered PDF editor for every device
Bilingual AI translation for websites, documents, video and images
Bilingual AI translation for websites, documents, video and images
Free AI-powered PDF editor, converter and reader for every device
Free AI-powered PDF editor, converter and reader for every device
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.
Cross-platform PDF editing with GPT-powered AI for reading, translating, and signing documents
Chat with any PDF, video, or website and get cited answers in seconds
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.
