GoPDF records 32,069 monthly visits with +0.3% month-over-month growth and Freemium pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
An all-in-one online PDF editor with AI chat, quizzes and invoicing
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | | |
|---|---|---|
| Official Domain | gopdf.io | sider.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 32.07K (32,069) | 2.64M (2,644,740) |
| MoM Traffic Delta | +81 (+0.3%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇺🇸 United States (18%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 11.34K | 1.7M |
| User Rating | 4.1 | 4.5 |
| Supported Platforms | Website | Website |
An all-in-one online PDF editor with AI chat, quizzes and invoicing
Ask questions about a document and get answers drawn from its content, so long reports and contracts do not need to be read line by line.
Modify text and images directly, add pages, headers and footers, use search and replace, and fill or sign forms with manual or image signatures.
Convert between PDF, Word, JPG and HTML, shrink oversized files, merge or split documents and remove excess pages.
Generate tailored quizzes from source content and create, manage and send invoices from the same platform.
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
AI-powered PDF editor for Windows, Mac and iOS
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.
All-in-one online PDF editor with AI helpers for reading, summarizing, and generating documents
All-in-one online PDF editor with AI helpers for reading, summarizing, and generating documents
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.
