aiPDF records 3,816 monthly visits with -26.2% month-over-month growth and Freemium pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
Chat with PDFs, books, websites, YouTube videos and podcasts
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | ||
|---|---|---|
| Official Domain | aipdf.ai | sider.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 3.82K (3,816) | 2.64M (2,644,740) |
| MoM Traffic Delta | -1.36K (-26.2%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇺🇸 United States (91.9%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 1.5K | 1.7M |
| User Rating | 4.2 | 4.5 |
| Supported Platforms | Website | Website |
Chat with PDFs, books, websites, YouTube videos and podcasts
Upload PDFs, EPUB books, text files or paste a web article link, YouTube video or podcast episode and chat with the content in one interface.
Responses are backed by the passages they were drawn from, so you can check the source text instead of taking an answer on faith.
Large documents are summarised with their whole context in mind, which matters for ebooks and lengthy reports.
The system supports many languages and replies in the language of your question.
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.
A free, AI-powered PDF editor for every device
Free AI-powered PDF editor, converter and reader for every device
Free AI-powered PDF editor, converter and reader for every device
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.
Chat with any PDF and get cited answers instantly
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.
