
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. Tabbit records 1,285 monthly visits with -85.6% growth and Freemium pricing.

The agentic browser that thinks with your tabs
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | sider.ai | tabbitbrowser.com |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 2.64M (2,644,740) | 1.29K (1,285) |
| MoM Traffic Delta | -314.2K (-10.6%) |
| -7.63K (-85.6%) |
| Primary Market & Share | 🇺🇸 United States (13.3%) | 🇺🇸 United States (100%) |
|---|
| Direct Visits / mo | 1.7M | 505 |
|---|
| User Rating | 4.5 | 4.2 |
|---|
| Supported Platforms | Website | Website |
|---|
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.

The agentic browser that thinks with your tabs
The agent can read open tabs, PDFs, bookmarks, HTML elements, screenshots, highlights and local files. Mention anything you have on screen — '@' a tab, a file or a highlighted element — and the agent picks it up as context.
Access most major models from inside the browser, with new versions typically available within about 12 hours of launch. The active model is displayed at the top of each chat so you always know which one is answering.
A large library of pre-built Skills covers popular sites and everyday tasks — pulling highlights from long videos, exporting a transcript to a knowledge base, summarising a research feed, or auditing subscriptions from email receipts. You can also package your own recurring prompts into Skills.
Research, operator, writing and analysis roles can be loaded with the right Skills and run in parallel for bigger jobs, so a single request can fan out across several specialised agents instead of one generalist chat.

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.

Your personal AI agent from Meta that actually gets things done
#3A general-purpose AI agent that executes tasks, not just answers them

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.

The AI browser that reads between your tabs

An AI supercompanion that handles tasks, code and creative work end to end

The agentic AI browser that reads your tabs, files, and screenshots as context

Free / Open-sourceOpen-source desktop AI workforce that runs browser, file, and app tasks for you

Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.

Free / Open-sourceFree browser that lets AI agents run parallel web automation with your own logins
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.
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.
An AI supercompanion that handles tasks, code and creative work end to end
The agentic AI browser that reads your tabs, files, and screenshots as context
Free / Open-sourceFree browser that lets AI agents run parallel web automation with your own logins