
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

Sider records 2,644,740 monthly visits with -10.6% month-over-month growth and Freemium pricing. StudyMateAI records 0 monthly visits with — growth and Free pricing.

A free ChatGPT-powered study companion that lives in your browser and PDFs
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | sider.ai | chromewebstore.google.com |
| Pricing Model | Freemium | Free |
| Monthly Visits | 2.64M (2,644,740) | 0 (0) |
| MoM Traffic Delta |
| -314.2K (-10.6%) |
| 0 (—) |
| Primary Market & Share | 🇺🇸 United States (13.3%) | 🌐 Global (—) |
|---|
| Direct Visits / mo | 1.7M | 0 |
|---|
| User Rating | 4.5 | 1.8 |
|---|
| Supported Platforms | Website | Browser Extension |
|---|
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.

A free ChatGPT-powered study companion that lives in your browser and PDFs
Point the extension at a long article, lecture note, or PDF page and get a condensed version that keeps the argument intact rather than stripping it to bullet fragments.
Convert a passage into study cards you can use for active recall, which saves the manual step of rewriting notes before you can start memorizing.
Ask a direct question about what you are reading and receive a natural-language answer in the extension, without opening a separate AI chat tab.
Highlight a term or concept you are stuck on and get an immediate explanation in context, so you keep your reading rhythm instead of breaking off to search.

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.

Share and access study materials worldwide — with AI study tools built in
AI flashcards that turn note dumps and PDFs into addictive quiz sessions

Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Free AI flashcard and study tools for students
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.

One AI assistant that plugs ChatGPT, Claude and Gemini into every tab
Chat with any PDF, video, or website and get cited answers in seconds
Highlight the web, learn in public, and build your AI clone
Europe's student learning hub with notes, AI flashcards and AI chat

Turn any lecture, PDF, or video into notes, flashcards, and quizzes in minutes
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.
Share and access study materials worldwide — with AI study tools built in
AI flashcards that turn note dumps and PDFs into addictive quiz sessions
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Free AI flashcard and study tools for students
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
One AI assistant that plugs ChatGPT, Claude and Gemini into every tab
Highlight the web, learn in public, and build your AI clone
Europe's student learning hub with notes, AI flashcards and AI chat
Turn any lecture, PDF, or video into notes, flashcards, and quizzes in minutes