# Numberly vs Sider

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

| Metric | [Numberly](https://openaitools.app/tool/numberly) | [Sider](https://openaitools.app/tool/sider) |
| :--- | :--- | :--- |
| Website URL | https://www.numberly.app | https://sider.ai |
| Categories | AI Math, AI Assistant, AI Browsers, AI Productivity Tools | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 0 | 2,644,740 |
| MoM Growth Rate | 0% | -10.6% |
| Primary Market | Global | United States |
| Direct Visits | 0 | 1,699,535 |
| Review Score | 4.1 | 4.5 |
| Saved Count | 1 | 31 |
| Supported Platforms | Website | Website |

## Numberly

Numberly is a small, single-purpose Chrome extension: it solves math equations and performs metric conversions as you type. The pitch is simplicity — most people reach for a calculator app or a new tab several times a day for arithmetic that could just resolve where they are already typing, and Numberly collapses that step.

It fits into the same family of inline utility extensions as currency converters and unit helpers. You add it from the Chrome Web Store, pin it, and then work with numbers wherever a text field exists: checking a percentage while reading a report, converting centimetres to inches on a shopping page, or confirming a quick sum without losing your place.

Because the product is deliberately narrow, it is best evaluated as a convenience tool rather than a full AI assistant. The Chrome Web Store listing carries the details for installation and availability; note that the numberly.app website itself does not resolve at the time of review, so the store listing is the most reliable place to check the extension's current status.

**Pricing & Plans:** Listed on the Chrome Web Store as free to add, with no account required to start. Check the current store listing for any changes in availability or paid tiers.

- **Equations solved as you type:** Enter an equation while you type and Numberly resolves it immediately, removing the need to open a separate calculator.
- **Metric and unit conversion:** Convert between metric and other measurement units inline, which is handy when reading specs, recipes or international listings.
- **Works inside your browser:** Runs as a lightweight Chrome extension inside the pages you already use, so there is no dashboard or app to switch to.
- **Everyday calculation utility:** Keeps everyday arithmetic, percentages and conversions in one inline tool rather than scattered across tabs.
- **Quick to install:** Installs from the Chrome Web Store and is ready to use without a complicated account setup.

**Strengths:** Solves equations and conversions inline as you type; Lightweight and focused — no dashboard to learn; Works inside Chrome where you are already working; Free to add from the Chrome Web Store

**Limitations:** Purely a calculation/conversion utility, not a general assistant; The www website domain does not currently resolve, so discovery is mainly via the Chrome Web Store; Requires Chrome and adding an extension to your browser; Narrow scope compared with AI chatbots that also handle math

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

## 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)

## Frequently Asked Questions

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

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

### How do their growth rates compare?

Numberly has a month-over-month growth rate of 0%; Sider has -10.6%.

### How does pricing compare?

Numberly: Freemium. Listed on the Chrome Web Store as free to add, with no account required to start. Check the current store listing for any changes in availability or paid tiers. 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.

## 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 | [Solvely AI](https://openaitools.app/tool/solvely-ai) | 4,526,289 | +134% | Freemium | All-in-one AI study tool for homework help, exam prep, notes, and flashcards | [.md](https://openaitools.app/tool/solvely-ai.md) |
| 4 | [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | -11.3% | Freemium | Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools. | [.md](https://openaitools.app/tool/monica-ai.md) |
| 5 | [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) |
| 6 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider. | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 7 | [Math AI Solver](https://openaitools.app/tool/math-ai-solver-free-online) | 298,744 | +8.5% | Freemium | Snap or type any math problem and get step-by-step solutions | [.md](https://openaitools.app/tool/math-ai-solver-free-online.md) |
| 8 | [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) |
| 9 | [Kome AI](https://openaitools.app/tool/kome-ai) | 174,910 | -6.5% | Freemium | Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider. | [.md](https://openaitools.app/tool/kome-ai.md) |
| 10 | [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) |

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

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