
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.
Bookmarker records 4,227 monthly visits with -13.7% month-over-month growth and Paid pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.

Local-first Mac library for links, images and PDFs, sorted by on-device AI
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | bookmarker.cc | sider.ai |
| Pricing Model | Paid | Freemium |
| Monthly Visits | 4.23K (4,227) | 2.64M (2,644,740) |
| MoM Traffic Delta | -673 (-13.7%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇺🇸 United States (53%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 1.27K | 1.7M |
| User Rating | 4.3 | 4.5 |
| Supported Platforms | Website | Website |

Local-first Mac library for links, images and PDFs, sorted by on-device AI
Apple Foundation Models run locally to tag and summarize every link, image and PDF you save, so your library organizes itself with no setup and no cloud round-trip.
Search the text of every article, note and PDF in your library instantly, even with no connection.
Save a URL, a screenshot or an entire folder of documents the same way, and read any of them in a clean, ad-free reading view.
No account, no cloud sync and no tracking. Everything lives in a local database on your Mac unless you deliberately bring your own API key.
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.
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.
Chat with any PDF, video, or website and get cited answers in seconds
A polished space for notes, tasks, and documents that follows you across every device.
A polished space for notes, tasks, and documents that follows you across every device.
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.

AI agents that turn your own documents into summaries, mind maps and reports
AI agents that turn your own documents into summaries, mind maps and reports
Offline visual note-taking on an infinite canvas
Offline visual note-taking on an infinite canvas

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

AI agent and second brain that turns your files, meetings and browsing into finished work
AI agent and second brain that turns your files, meetings and browsing into finished work
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.