# Sider vs Syncia - Power of ChatGPT on any website

Sider records 2,644,740 monthly visits with -10.6% month-over-month growth and Freemium pricing. Syncia - Power of ChatGPT on any website records 0 monthly visits with — growth and Free pricing.

| Metric | [Sider](https://openaitools.app/tool/sider) | [Syncia - Power of ChatGPT on any website](https://openaitools.app/tool/syncia) |
| :--- | :--- | :--- |
| Website URL | https://sider.ai | https://chrome.google.com/webstore/detail/syncia/bhdfllifdfodbkihgmahlfmddlmfdjak |
| Categories | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader | AI Assistant, AI Chatbot, Large Language Models (LLMs), AI Summarizer |
| Pricing Model | Freemium | Free |
| 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 | 4.5 |
| Saved Count | 31 | 2 |
| 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)

## Syncia - Power of ChatGPT on any website

Syncia is a browser extension that injects an OpenAI-powered assistant into every web page you visit. Press Ctrl+Shift+X (or your own shortcut) and a sidebar opens where you can ask questions about the page, request rewrites, or brainstorm, all without switching tabs or copying content into a separate chat window. Because it works on top of the current tab, the assistant can be used directly on articles, documentation, emails, forums and web apps.

The second core piece is the selection menu. Highlight any passage of text and Syncia shows a small floating toolbar that can summarise it, simplify the language, translate it, check grammar, or adjust length. You can also save your own custom prompts and re-use them from that same menu, which turns favourite instructions into one-click actions.

Syncia is fully free and open source, published under the developer's GitHub repository. It does not ship a bundled model or subscription: you connect your own OpenAI API key, so you control the account, the spend and the data flow. Settings are handled on a dedicated configuration page, and the extension declares that it does not collect or sell user data.

**Pricing & Plans:** Free and open source. There is no subscription or paid tier; you supply your own OpenAI API key and pay OpenAI for the usage you generate.

- **Chat sidebar on any site:** Open an OpenAI-powered chat panel over the page you are browsing using a keyboard shortcut, so you never lose context.
- **Selection quick menu:** Highlight text to summarise, simplify, translate, check grammar, or change length from a floating toolbar under the selection.
- **Custom prompt library:** Save your own instructions as reusable prompts and trigger them from the quick menu in one click.
- **Bring your own API key:** Connect a personal OpenAI key for full control over the account, model choice and usage costs.
- **Open source and private:** The code is published publicly, the extension is free forever, and the developer states that no user data is collected or sold.

**Strengths:** Completely free and open source, with no paywall or bundled subscription; Works on virtually any website through a sidebar plus a selection toolbar; Custom prompt storage turns repeated instructions into one-click actions; Your own API key means full visibility and control over usage costs

**Limitations:** Requires a separate OpenAI API key and an OpenAI account before it is useful; Feature depth and model quality depend entirely on the OpenAI models you choose; Chrome-only, so Firefox, Safari and Edge users are not covered

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

## Frequently Asked Questions

### How do Sider and Syncia - Power of ChatGPT on any website compare in monthly traffic?

Sider has 2,644,740 monthly visits, while Syncia - Power of ChatGPT on any website 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%; Syncia - Power of ChatGPT on any website 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. Syncia - Power of ChatGPT on any website: Free. Free and open source. There is no subscription or paid tier; you supply your own OpenAI API key and pay OpenAI for the usage you generate.

## 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 | [Grammarly](https://openaitools.app/tool/grammarly) | 58,867,412 | -1.5% | Freemium | Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides. | [.md](https://openaitools.app/tool/grammarly.md) |
| 4 | [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) |
| 5 | [Merlin AI](https://openaitools.app/tool/merlin-ai) | 1,382,634 | +13.1% | Freemium | One-click AI assistant for browsing, writing and research | [.md](https://openaitools.app/tool/merlin-ai.md) |
| 6 | [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) |
| 7 | [Glarity](https://openaitools.app/tool/glarity-summarize-google-and-youtube) | 188,823 | -49.6% | Freemium | Summarize YouTube, Google, and any page with AI — free in your browser | [.md](https://openaitools.app/tool/glarity-summarize-google-and-youtube.md) |
| 8 | [Kome AI](https://openaitools.app/tool/kome-ai) | 174,910 | -6.5% | Freemium | Summarize, bookmark and write with AI right in your browser | [.md](https://openaitools.app/tool/kome-ai.md) |
| 9 | [Voilà — AI Assistant, Chat and Writer](https://openaitools.app/tool/voil-chatgpt-browser-assistant) | 152,170 | -4.8% | Freemium | Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools. | [.md](https://openaitools.app/tool/voil-chatgpt-browser-assistant.md) |
| 10 | [Ddict](https://openaitools.app/tool/ddict) | 32,146 | +2.4% | Freemium | Browser translation, dictionary, and AI writing assistant | [.md](https://openaitools.app/tool/ddict.md) |

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

More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)