# DeClassIFY vs Sider DeClassIFY records 0 monthly visits with — month-over-month growth and Freemium pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing. | Metric | [DeClassIFY](https://openaitools.app/tool/declassify) | [Sider](https://openaitools.app/tool/sider) | | :--- | :--- | :--- | | Website URL | https://chromewebstore.google.com/detail/declassify/lpjbjbclcjofeofjjjpgkciiklidkkkc | https://sider.ai | | Categories | AI PDF Summarizer, AI Text Classifier, AI Article Summarizer, AI PDF | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader | | Pricing Model | Freemium | Freemium | | Monthly Visits | 0 | 2,644,740 | | MoM Growth Rate | — | -10.6% | | Primary Market | Global | United States | | Direct Visits | 0 | 1,699,535 | | Review Score | 4.2 | 4.5 | | Saved Count | 0 | 31 | | Supported Platforms | Browser Extension | Website | ## DeClassIFY DeClassIFY installs as a browser extension and works on the PDFs you already download every day. Instead of opening each file to find out what it is, the extension reads the document and assigns it a category, turning a folder of mixed downloads into something you can triage at a glance. The pitch is simple: stop burning hours on files that were never useful to you. The extension is intentionally narrow in scope. It does not try to be a full document manager, an editor or a cloud drive — it does one job, classification, and keeps the footprint small (under half a megabyte) so it stays out of the way of normal browsing. The listing states that the developer does not collect or sell user data. Because it is distributed through the Chrome Web Store, installing and removing it takes a single click, and updates arrive automatically. It will suit researchers, students, analysts and office workers who collect large numbers of PDFs and need a fast first-pass filter. **Pricing & Plans:** Free to install from the Chrome Web Store. The listing does not advertise a paid tier; any premium features, if they exist, are not described on the store page. - **One-second PDF classification:** Reads a PDF and assigns it a document category immediately, so you can decide whether it deserves your attention. - **Triage for mixed download folders:** Turns a pile of unsorted PDFs into labelled groups you can scan quickly instead of opening file by file. - **Tiny footprint:** The extension is only a few hundred kilobytes, so it loads fast and does not slow browsing down. - **Privacy-conscious design:** The developer declares that user data is not collected, sold or used for unrelated purposes. - **One-click install and updates:** Installs straight from the Chrome Web Store and updates automatically, with no separate account required. **Strengths:** Very fast classification that removes the manual step of opening every PDF; Small, unobtrusive extension that does not slow the browser down; Free to install and distributed through the official Chrome Web Store; Explicit statement that user data is not collected or sold **Limitations:** Small user base at the time of writing, so community reviews are limited; Only classifies PDFs — it is not a reader, editor or file manager; No public pricing page describing premium tiers or higher limits [Profile (Markdown)](https://openaitools.app/tool/declassify.md) ## Sider Sider's premise is that you should not have to leave the page you are reading to use an AI assistant. Its sidebar overlays the browser, detects the content in view, and responds with chat, summaries, translations or explanations using frontier models from multiple providers. The result is a lightweight research and reading workflow: highlight a paragraph, ask for a simpler explanation, translate a PDF and keep the original in sight. Recent versions push Sider beyond chat. Sider Hand is a browser agent that works across real websites and uses your logged-in sessions to carry out multi-step jobs such as comparing prices while shopping, filling forms, doing cross-site research or triaging a Gmail inbox. Sider Code goes the other way, letting you instruct changes to a website's appearance or behaviour in plain language and preserving the customisation for next time. A Create module generates images, videos, slides and documents from the same panel. Pricing moves from a limited free tier to credit-based paid plans aimed at heavier users. Lower plans suit occasional chat, summarisation and translation, while higher tiers add a dedicated cloud computer that keeps the browser agent running around the clock and a larger monthly credit allowance. Sider ships as browser extensions for Chrome and Edge plus desktop and mobile apps for macOS, Windows, iOS and Android, and is used by a very large installed base. **Pricing & Plans:** Freemium. Free tier available with limited credits; paid plans advertised at roughly US$10/month for occasional use up to around US$100/month at the top tier, with higher credit allowances and a dedicated cloud computer on the upper plans. - **AI sidebar on any page:** 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 and chat with documents:** Summarise long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material. - **Translation and read-aloud:** Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move. - **Sider Hand browser agent:** Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions. - **Sider Code page customisation:** Describe a change in plain words and have Sider restyle or simplify any website, remembering the modification for future visits. **Strengths:** Works inside the browser you already use, with no context switching; Access to multiple frontier models from one subscription; Strong reading toolkit: PDF chat, YouTube summaries, translation and read-aloud; Increasingly capable agent features for multi-step browser tasks **Limitations:** Useful credits run out quickly on the free and lower tiers; Model availability and quota rules change over time, so expectations must be checked per plan; Some agent and code features depend on a cloud machine and heavier plans [Profile (Markdown)](https://openaitools.app/tool/sider.md) ## Frequently Asked Questions ### How do DeClassIFY and Sider compare in monthly traffic? DeClassIFY has 0 monthly visits, while Sider has 2,644,740. Traffic estimates describe audience size, not product quality. ### How do their growth rates compare? DeClassIFY has a month-over-month growth rate of —; Sider has -10.6%. ### How does pricing compare? DeClassIFY: Freemium. Free to install from the Chrome Web Store. The listing does not advertise a paid tier; any premium features, if they exist, are not described on the store page. Sider: Freemium. Freemium. Free tier available with limited credits; paid plans advertised at roughly US$10/month for occasional use up to around US$100/month at the top tier, with higher credit allowances and a dedicated cloud computer on the upper plans. ## Alternatives | # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1 | [ChatGPT](https://openaitools.app/tool/chatgpt-4) | 6,048,022,723 | +2.2% | Freemium | OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research. | [.md](https://openaitools.app/tool/chatgpt-4.md) | | 2 | [Claude](https://openaitools.app/tool/claude-2) | 1,253,439,413 | +23.8% | Freemium | Anthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing. | [.md](https://openaitools.app/tool/claude-2.md) | | 3 | [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | -11.3% | Freemium | Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools. | [.md](https://openaitools.app/tool/monica-ai.md) | | 4 | [PDFgear](https://openaitools.app/tool/pdfgear) | 2,845,280 | -3.4% | Free | A free, AI-powered PDF editor for every device | [.md](https://openaitools.app/tool/pdfgear.md) | | 5 | [Merlin AI](https://openaitools.app/tool/merlin-ai) | 1,382,634 | +13.1% | Freemium | Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features. | [.md](https://openaitools.app/tool/merlin-ai.md) | | 6 | [UPDF AI](https://openaitools.app/tool/updf-ai) | 1,050,387 | -7.2% | Freemium, Free Trial, Paid | Cross-platform PDF editing with GPT-powered AI for reading, translating, and signing documents | [.md](https://openaitools.app/tool/updf-ai.md) | | 7 | [ChatPDF](https://openaitools.app/tool/chatpdf) | 1,044,477 | -3.7% | Freemium | Chat with any PDF, video, or website and get cited answers in seconds | [.md](https://openaitools.app/tool/chatpdf.md) | | 8 | [Glasp](https://openaitools.app/tool/glasp) | 889,564 | -14.1% | Freemium | Highlight the web, learn in public, and build your AI clone | [.md](https://openaitools.app/tool/glasp.md) | | 9 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider. | [.md](https://openaitools.app/tool/harpa-ai.md) | | 10 | [PDF.ai](https://openaitools.app/tool/pdf-ai) | 387,819 | -5.5% | Freemium, Free Trial | Chat with any PDF and get cited answers instantly | [.md](https://openaitools.app/tool/pdf-ai.md) | --- Source: https://openaitools.app/compare/declassify-vs-sider More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)