# Sider vs tabOS

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

| Metric | [Sider](https://openaitools.app/tool/sider) | [tabOS](https://openaitools.app/tool/tabos) |
| :--- | :--- | :--- |
| Website URL | https://sider.ai | https://chromewebstore.google.com/detail/tabos/kjmamngookndcomlilkjckmbcneipnop |
| Categories | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader | AI Assistant, AI Productivity Tools, AI Chatbot, AI Copilot |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 2,644,740 | 0 |
| MoM Growth Rate | -10.6% | — |
| Primary Market | United States | Global |
| Direct Visits | 1,699,535 | 0 |
| Review Score | 4.5 | 4.3 |
| Saved Count | 31 | 1 |
| Supported Platforms | Website | Browser Extension |

## 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)

## tabOS

tabOS is a Chrome extension that reframes your browser's new tab as a small operating system for your work. Rather than being a one-trick tab manager, it bundles tab and group management with documents, notes, feeds and AI into a single surface. You install it from the Chrome Web Store, and from then on every new tab is a dashboard where you lay your open work out in the open instead of hunting through a strip of tabs.

The tab management layer is thorough: drag and drop to save or close tabs and groups, create and rearrange groups, layer groups into folders, discard tabs to free memory, pin and move tabs, and view everything in grid, column, list or tree layouts. Alongside it sits a real productivity stack — create documents with Markdown and syntax highlighting, take quick notes, run to-do lists and store code snippets and images, all without leaving the browser. There is also a feeds section for RSS, YouTube and Reddit.

The AI side is where tabOS leans into the ChatGPT branding. You can assemble custom-prompted AI helpers, chat with AI, use Vision AI for image recognition, and select among ChatGPT 3.5, 4.0 and Turbo. A sharing and collaboration layer supports shared folders, shared documents and live sessions, with global, open-tab and fuzzy search to find anything across tabs, bookmarks and cloud files. Pricing is freemium: a Free Plan covers the core, while Pro and AI Plus plans add extra cloud storage, AI sorting and automatic daily backups. It is developed by Aconiti interfaces AB, the same independent studio behind tabExtend, and is not an official Google product.

**Pricing & Plans:** tabOS uses a freemium model with in-app purchases. The Free Plan unlocks the core workspace features and can be started with an anonymous account. Pro and AI Plus plans add extra cloud storage, AI sorting capabilities and automatic daily backups; exact prices are shown in the Chrome Web Store and in-app.

- **Tab and group management:** Manage tabs and tab groups, drag and drop to save or close them, discard tabs to free resources, and organise everything in grid, column, list and tree views.
- **Documents and notes:** Create and edit documents, take notes, manage to-dos, store code snippets and use Markdown with syntax highlighting directly in the new tab.
- **AI helpers and assistants:** Assemble custom-prompted AI helpers, chat with AI, use Vision AI for image recognition and choose among ChatGPT 3.5, 4.0 and Turbo models.
- **RSS, YouTube and Reddit feeds:** Create and subscribe to RSS feeds, and follow YouTube and Reddit feeds, all from inside your new tab.
- **Search and organisation:** Search across tabs, bookmarks and cloud files with global, open-tab and fuzzy search, and keep data safe with automatic daily backups on paid plans.

**Strengths:** Combines tab management, documents, notes, feeds and AI in one surface; Solid tab workflow with groups, folders, discarding and multiple view layouts; Free Plan covers the essentials, with paid tiers for storage and AI sorting; Includes collaboration features like shared folders and documents

**Limitations:** Pro and AI Plus tiers are needed for extra cloud storage and AI sorting capabilities; It is a full workspace system, so there is more to learn than a simple tab-grouping add-on; AI features depend on the ChatGPT models the extension exposes, whose availability and behaviour can change

[Profile (Markdown)](https://openaitools.app/tool/tabos.md)

## Frequently Asked Questions

### How do Sider and tabOS compare in monthly traffic?

Sider has 2,644,740 monthly visits, while tabOS has 0. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Sider has a month-over-month growth rate of -10.6%; tabOS has —.

### How does pricing compare?

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. tabOS: Freemium. tabOS uses a freemium model with in-app purchases. The Free Plan unlocks the core workspace features and can be started with an anonymous account. Pro and AI Plus plans add extra cloud storage, AI sorting capabilities and automatic daily backups; exact prices are shown in the Chrome Web Store and in-app.

## 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 | All-in-one AI assistant across web, browser, desktop and mobile | [.md](https://openaitools.app/tool/monica-ai.md) |
| 4 | [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) |
| 5 | [Merlin AI](https://openaitools.app/tool/merlin-ai-plugins) | 1,382,634 | +13.1% | Freemium | One AI assistant that plugs ChatGPT, Claude and Gemini into every tab | [.md](https://openaitools.app/tool/merlin-ai-plugins.md) |
| 6 | [Craft](https://openaitools.app/tool/craft-do) | 703,417 | +8.9% | Freemium | A polished space for notes, tasks, and documents that follows you across every device. | [.md](https://openaitools.app/tool/craft-do.md) |
| 7 | [Tabbit Browser](https://openaitools.app/tool/tabbit-ai) | 670,981 | -30.2% | Freemium | The agentic AI browser that reads your tabs, files, and screenshots as context | [.md](https://openaitools.app/tool/tabbit-ai.md) |
| 8 | [Chatbox](https://openaitools.app/tool/chatbox) | 567,170 | -16.1% | Freemium | One privacy-first AI client for GPT, Claude, Gemini and more | [.md](https://openaitools.app/tool/chatbox.md) |
| 9 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | One browser agent that combines every major AI model with web automation | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 10 | [Typing Mind](https://openaitools.app/tool/typing-mind) | 533,103 | +12.9% | Paid | The best frontend for AI. | [.md](https://openaitools.app/tool/typing-mind.md) |

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Source: https://openaitools.app/compare/sider-vs-tabos

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